Magnesium Chloride Prill: A Commentary on Its Past, Present, and Future

Historical Development

For centuries, people extracted minerals like magnesium chloride from salty lakes and sea beds. Back in the late 19th century, as Europe’s chemical industry grew, companies hunted for ways to separate different salts. They used solar evaporation and crystallization, since the separation often happened under the sun, not in a laboratory. Magnesium chloride didn't pull much attention until industrial uses for lightweight metal alloys and deicing chemicals exploded. Its role changed as its prilled form—those hard, small beads—arrived, solving messy handling problems. I remember reading how road departments once complained about slippery brine and dusty flakes. Prills felt like a quiet revolution: easy to spread, easy to store, tough enough to survive transport. Decades passed, and the demand kept rising in industries ranging from chemical processing to sustainable agriculture.

Product Overview

The magnesium chloride prill is a compact form, round and consistent in size, typically white or grayish. Prilling takes the salt and melts it to drop into a tall tower, forming tiny beads as it cools mid-air. This gives us a product that handles much easier than powder or flakes. Suppliers now offer technical-grade prill for dust suppression, snow removal, specialized concrete, even as a supplement for livestock. Consumers sometimes grab pharmacy-grade prill for bath salts or trace mineral additions. You’ll find packaging from bulk sacks for industry to small tubs in a health aisle.

Physical & Chemical Properties

Magnesium chloride prill offers a formula of MgCl₂∙6H₂O in most hydrated forms, with a molecular weight hovering at 203.3 g/mol. Hard, roughly spherical beads, they absorb moisture from the air. Their deliquescent nature stands out, since prills can turn to liquid if left exposed. They melt at around 118°C in their hexahydrate state, and easily dissolve in water—no stirring tricks needed. Chemically, they remain stable at room temperature, but, once heated, they break down into magnesium oxide, hydrochloric acid, and water. Unlike sodium chloride, magnesium chloride wears less on equipment and presents lower corrosion. That matters in road deicing, since no one wants rotted car undercarriages or pipes in city waterworks.

Technical Specifications & Labeling

Every bag or drum tells a story about purity, moisture, prill size, and trace impurities. High-grade material, often labeled for food or pharmaceutical use, demands magnesium chloride above 98% and heavy metal content in the low ppm range. Technical grades allow for some calcium, potassium, and sodium in the mix, as long as they don’t interfere with the intended use. Buyers pay attention to sieve analysis, which sorts prills into the right particle size range. Batch numbers, country of origin, and safety guidance all appear on a well-printed label. Material Safety Data Sheets speak plainly about what’s inside and how to handle it. Regulations from groups like REACH and EPA force producers to keep detailed records on everything from raw mineral sourcing to transport logistics.

Preparation Method

Producers usually start by running brine solution—often from underground sources or salt lakes—through a series of evaporation ponds. Much of this work now happens at sites near the Great Salt Lake in Utah or in the Dead Sea basin, where both sun and wind do most of the heavy lifting. After evaporation chases off much of the water, fractionated crystallization separates magnesium chloride from sodium and other salts. This concentrated solution heads to a tall prilling tower, where it melts before being sprayed in fine droplets from the top. As the droplets tumble down, they cool into hard prills collected at the bottom. This process keeps dust low and ensures the finished granules store well, resisting clumping on warm, humid days. Every batch runs through a drying line and screening, leaving only hard, evenly sized prills for packaging.

Chemical Reactions & Modifications

Magnesium chloride enters the spotlight as both a reagent and a participant in chemical reactions. When heated strongly, it decomposes to form magnesium oxide, releasing hydrochloric acid vapor and water—a useful reaction in producing refractory bricks. In water, it dissociates, freeing magnesium and chloride ions, which support soil health and stabilize roads. React magnesium chloride with ammonia and you get complex salts for fertilizer blends. It also acts as a flocculant in wastewater, pairing with phosphates and helping settle out suspended solids. Industry tweaks the formula by adding anti-caking agents or blending prill size for custom jobs. Sometimes potassium or calcium chloride gets blended in, to suit special demands like ice melt at extreme temperatures or adjust nutrient content for animal feed.

Synonyms & Product Names

Some call it simply “mag chloride.” The food world refers to it as nigari, prized in tofu production. Agriculture circles use “magnesium dichloride” or “E511.” Pharmaceutical and laboratory supply shops list it as “hexahydrate” or “bitter salt.” Trade names vary, with some brands emphasizing purity or their prilling technique. Labels like “Ice Fighter” or “Dust Suppressant Prill” fill out hardware store shelves when snow season or construction projects roll around. Local names in Asia and Europe dot the international supply chain, but the core ingredient stays the same.

Safety & Operational Standards

Handling magnesium chloride prill requires simple precautions. It's not acutely toxic, but it stings cuts and eyes, and, like most concentrated salts, can irritate the lungs if dust rises during handling. Workers wear gloves and safety glasses in bulk applications, and plenty of ventilation steers clear of fine particles. Machines spreading prill along highways or shop floors roll with anti-corrosion liners, since magnesium chloride draws moisture and can wear at metal over time. Storage relies on sealed bags or silos kept away from rain and high humidity. The material ranks as environmentally friendly compared to harsh alternatives, but local wildlife and waterways should stay clear of big spills, which can disrupt aquatic mineral balances. Regulations from OSHA and similar agencies keep factories honest with air quality and worker safety, pushing better practices across the industry.

Application Area

Magnesium chloride prills pinch-hit all over: road deicing, dust control, agriculture, water treatment, even the food and wellness industries. Road crews started spraying brines and spreading prill to keep ice at bay, since the salt stays put and works at lower temperatures than sodium chloride. Farmers trust it for extra magnesium in animal feed, since both plants and livestock need this mineral for basic health. Cities use prill in dust suppression, controlling airborne particles on dirt roads and construction sites during dry seasons. Water treatment facilities find magnesium chloride boosts coagulation and softens water. Makers of tofu and pickles reach for high-purity grades as coagulants and mineral supplements. Even bath salts and foot soaks pick up these prills for their claimed muscle relaxing benefits. Not every user thinks about downstream effects, but the mineral’s handy and versatile nature lands it far beyond its humble beginnings as a byproduct.

Research & Development

Universities and private labs push research around magnesium chloride’s role in green industries, soil health, and advanced materials. Researchers target improved prill size and shelf life, since clumping and caking still bug some customers. Ongoing studies look at blending magnesium chloride with organic binders to limit environmental impact in road maintenance. Others study its effect on trace metal uptake in crops, hoping to unlock benefits for human nutrition. Technological improvements in extraction and purification keep costs down and reduce waste. Patents pile up for creative new blends, like prills with slow-release coatings or biochar to support low-carbon farming. International trade groups sponsor studies tracking supply chain sustainability and life cycle emissions, making magnesium chloride prill part of larger conversations about climate and public health.

Toxicity Research

Large-scale studies on magnesium chloride suggest low toxicity for humans and wildlife when used as directed. Swallowed in modest doses, magnesium chloride supports health, and people with magnesium deficiency benefit from supplements. High intake, especially through contaminated water or accidental ingestion of concentrated product, can cause digestive upsets and, at extreme doses, more serious health issues like bradycardia or respiratory depression. Spillover into streams can disturb aquatic ecosystems, raising chloride levels and mineral loads. Animal testing follows strict regulatory controls, and long-term monitoring looks for chronic toxicity in both terrestrial and aquatic settings. Worker exposure tends to fall below OSHA limits, but continued vigilance over air quality and repeated skin contact stays key. Researchers keep watching for subtle effects on soil microbes and native plants, since repeated spreading may alter delicate soils or water quality over time.

Future Prospects

Magnesium chloride prill faces a changing landscape. Demand grows for cleaner roads, healthier soils, and lighter, tougher metals in industries like automotive and aerospace. Researchers push hard to create greener prills with recycled content or barriers that slow environmental release. As cities and farms grapple with climate shifts, the need for dust control and gentler deicing only increases. Investment in renewable energy also creates markets for lightweight magnesium alloys, pumped full of chloride-based catalysts and intermediates. Digital tracking and blockchain now offer transparency in sourcing, letting buyers trace each prill back to its original lake or mine. People keep looking for alternatives to sodium-based salts, aiming for less corrosive, more sustainable deicing, and magnesium chloride prill keeps showing up as a solid option. Nobody expects it to fade away—more likely, we’ll see smarter blends, tighter controls, and new uses emerge as science and necessity catch up with old habits.



What are the primary uses of Magnesium Chloride Prill?

Keeping Ice at Bay

Ask anyone from the northern states about winter, and somebody will bring up ice on roads and sidewalks. A bag of magnesium chloride prill in the trunk helps keep driveways safe without chewing up the concrete or harming pets’ paws as rock salt does. Streets and public walkways need reliable deicers, and cities see fewer corrosion problems on vehicles and infrastructure when they use magnesium chloride instead of traditional salts. Studies have shown that magnesium chloride is less harsh on metal and concrete, which means fewer repair bills each spring.

Water Treatment and Dust Control

Nothing brings out a cough quite like dust billowing from a gravel road. Magnesium chloride prill finds its way onto these roads in rural towns and busy industrial zones, binding dust and pulling moisture from the air to keep surfaces damp. Municipalities and construction crews get longer stretches of clear air and less wear on vehicles. I’ve seen road crews spread prills ahead of summer’s dry spells; dust clouds shrink, making a real difference for anyone living nearby. This isn’t just an American practice—industrial sites across the world trust magnesium chloride for dust control where sand and gravel grind against tires every day.

Helping Out in Agriculture

Farmers always look for ways to feed crops and livestock efficiently. Magnesium chloride prill often finds a home in farmyards and fields. Cows, sheep, and even goats need magnesium in their diets to avoid metabolic disorders, and supplementing their feed with the right minerals helps prevent sick animals and costly vet visits. Crop soil sometimes runs low on magnesium. Farmers use the prills as an easy-to-handle fertilizer boost that dissolves gradually, releasing magnesium as rain and irrigation water breaks it down. Healthy soil grows better crops, plain and simple.

Assisting Wellness and Health

Many people drop magnesium chloride prill into bathwater after tough workdays. That’s not just folk wisdom. Bodies need magnesium for muscle function, and there’s truth to the idea that soaking in a magnesium-rich bath helps soreness and relaxation. Health food stores carry these prills as supplements. Some people mix them into their own skin-care solutions. The medical world recognizes magnesium’s role in hundreds of body processes—from calming nerves to supporting the heart. While popping prills like candy isn’t recommended, using them in moderation supports well-being for many.

A Helper for Industry

Factories don’t always make headlines, but magnesium chloride prill keeps many industries running smoothly. Paper mills use the prills during pulping, and textile factories rely on magnesium chloride during dyeing processes. Concrete workers sometimes add a bit to speed up setting times or help mixes resist extreme cold. Chemical producers grab magnesium chloride as an ingredient for other useful products. Over the years, I’ve talked with industry folks who appreciate how easily prills dissolve and mix—time saved means money saved.

Better Choices, Fewer Problems

Magnesium chloride prill stands out because it solves problems without some of the trade-offs you get with older products. Less damage to roads and vehicles, less dust in the air, and more health for livestock, land, and people—these are the real benefits we’ve seen. With more research and open conversations between government, farmers, and businesses, smarter uses for magnesium chloride will keep showing up. There’s plenty of room for responsible, science-backed solutions, whether you’re spreading the prills by hand or handling metric tons with a bulldozer.

Is Magnesium Chloride Prill safe for use around plants and pets?

Looking Beyond the Label

Magnesium chloride prill gets a lot of shelf space in the ice melt aisle and on garden forums as a “safer salt.” That phrase always rings in my ears when questions about a product’s safety pop up. Plenty of homes back up to driveways or sidewalks where ice melt lands, often just a stray wind away from garden beds or a curious dog’s nose. People end up using what’s marketed as dog-safe, plant-friendly, or people-pleasing even without reading the fine print.

How It Impacts the Soil and Greenery

I’ve spent more than a few spring mornings scraping away the gritty leftovers from icy sidewalks. Over the years, I’ve watched lawns at the curb edge go yellow, then patchy, after rough winters with heavy salt use. Traditional rock salt (sodium chloride) causes a lot of that burn. Magnesium chloride prill carries a reputation for gentler soil impact. Unlike sodium-based salts, magnesium supplies a nutrient that plants use already, sometimes even as a foliar spray or soil additive.

But dumping any salt—magnesium included—on green spaces or garden beds in big doses brings trouble. Roots don’t care where the salts come from; high levels upset water uptake and throw off nutrient balance. Studies from extension services at major universities have measured various melts and found magnesium’s effect less harsh, yet the damage shows up with overuse or repeated application. I’ve seen perennials struggle and shrubs shed leaves near walkways with heavy ice melt use, including magnesium products.

Pets and Prills: What Owners Should Know

Dog owners flip over every bag looking for reassurance. I’ve had pet sitters and neighbors ask if magnesium chloride prill burns paws or poses a poison risk. Compared to rock salt, it causes less irritation, which matters if your dog is anything like mine—always paw-deep in the slush. The prills dissolve faster, so there’s less grit to get stuck between toes. Veterinary toxicologists report fewer serious ingestion risks with magnesium compared to potassium or calcium-based de-icers, though a bored puppy that snacks on a big spill can still land in the vet’s office.

It’s not just about direct contact. Melted salts run off into puddles, linger in low spots, and drift in dust form. Pets drink from these, lick paws after walks, and absorb trace chemicals. Careful sweeping and rinsing matter, but no product is entirely risk-free if overused.

Finding a Smarter Approach

Many gardeners and pet owners want a safer fix, not just a new label. Less can be more — shoveling promptly, using sand for traction, diluting prills with sawdust, or simply spreading them thinner goes a long way. In some city parks, alternatives like beet juice brine or crushed shells supplement small amounts of salt. On my own paths, I sweep leftover prill up for spring reuse instead of letting it sink into garden beds.

Magnesium chloride prill gives people a tool for tough weather, not a blank check. Out of all the options out there, it brings a lower risk to roots and paws, but seeing it as harmless encourages misuse. Trusted practices, good cleanup, and being aware of runoff keep damage in check. Any product that melts ice can hurt green life and four-legged family if used with a heavy hand. Getting informed, choosing wisely, and keeping an eye on actual conditions makes the real difference.

How should Magnesium Chloride Prill be applied for ice melting or dust control?

Making Roads and Walkways Safer

Magnesium chloride prill solves real problems every winter and every dusty summer. On icy sidewalks or highways, prills work fast. Scatter them with a regular spreader right before a snowstorm or as soon as ice forms. The grains start pulling moisture from the air, which helps form a brine on the surface. That liquid cuts through ice better than plain rock salt, even when the weather drops below zero.

I’ve watched city crews keep downtrodden intersections clear with magnesium chloride when standard salt failed to make a dent. Parents and homeowners looking to avoid dangerous slips can use it directly on steps and driveways. Just be careful with application—a few pounds over a ten-car driveway makes a difference, and overdoing it won't speed things up. Excess runoff can harm grass and soil. For dog owners, it’s usually less harsh on paws than sodium-based options.

Choosing the Right Equipment

Low-tech equipment works fine for applying prills. For walkways and smaller lots, I’ve used a hand-held scoop and a wheeled broadcast spreader. Larger areas like parking lots need a tow-behind or truck-mounted spreader to reach every patch. If the prills show signs of clumping, I always check that the spreader is moving freely. Moisture can get into prills if stored poorly, so a sealed bucket in a garage beats a ripped bag in the back yard.

For roads, municipalities often blend magnesium chloride with sand or gravel. When it’s cold and dry, prill set down before a storm can slow ice from bonding. Reapplication helps after plows pass through, especially if temperatures swing up and down with the sun.

Dealing with Dust on Rural Roads

In rural areas, dust control matters for health and quality of life. Magnesium chloride soaks right into gravel, trapping fine particles that otherwise float off with every passing car. In my hometown, drivers would kick up choking dust clouds all spring and summer. Crews fixed the problem each year by mixing prills with water and spraying the wet solution with a tanker truck. The coat lasted for weeks, sometimes for a month, cutting down on road repairs and complaints from neighbors.

Timing matters. The soil should be damp—not muddy, not bone dry. After application, let the road settle. Traffic can compact it, extending the dust control. Applied too late, when the road is already cracked and split, magnesium chloride spreads less evenly and washes away with rain. Farmers can also spread prills on farm roads using a simple fertilizer spreader and then wet it down with a hose or a water tank.

Understanding Impact and Safety

Magnesium chloride came under scrutiny for possible effects on plants, water quality, and vehicle corrosion. It tends to be less corrosive than standard rock salt, but cars still benefit from regular washing during the melt season. Local authorities keep an eye on waterways to avoid chloride buildup. Using only as much as needed and storing it away from drains helps prevent runoff and keeps lawns and gardens healthier.

Smart Use Protects People and the Land

Magnesium chloride prill stands out because it does a tough job with fewer side-effects than some alternatives. Reliable application prevents falls in winter and brings peace in dusty months. My own experience—along with research from state transport departments and environmental agencies—underlines the value of smart, measured use. Communities gain from safe streets, healthy air, and cleaner cars and homes with a little know-how and care when putting these white grains to work.

What is the difference between Magnesium Chloride Prill and flakes?

Magnesium’s Many Roles in Everyday Life

Magnesium chloride can show up in your hands as prills or flakes, and folks often wonder if the difference matters. After working in agriculture and keeping an eye on winter road safety more than once, I’ve noticed a fair share of confusion about these two forms. Some ranchers swear by prills for animal magnesium supplementation. Maintenance crews spread flakes by the truckload during icy spells. Both show up in stores, usually in hefty bags with not much explanation. People who haven’t handled them before might think it’s all the same, but the form you pick can change your workday.

Physical Form and Handling

The main difference sits in the size and feel. Prills look like tiny, round pellets—think of coarse salt or fish food. Flakes break into thin, irregular pieces, almost like chipped ice or dried coconut slivers. This may sound minor, but in my experience, the form you choose decides spilling speed, scooping ease, and the mess you’ll make. Prills run through spreaders or scoops with less clumping. Farmers dumping them into feed or onto fields tend to make less dust. Flakes, dry or half-wet, catch the wind and create clouds—you’re likely to breathe in some if you rush the job.

Dissolving and Application Speeds

People wanting magnesium chloride for dust control or ice melting usually reach for flakes. The flakes break down fast when you toss water over them, melting ice or binding road dust in a pinch. In sub-zero weather, this quick action can help stop a walkway from becoming a lawsuit. Prills, with their thicker shape, roll less and resist melting quite as quickly. If you're working with livestock, though, that slower dissolve can be a plus. Animals benefit from a steady release, not one big jolt of magnesium, so I’ve always stuck to prills in feed mixtures. Healthcare folks using magnesium baths mention similar trade-offs; prills offer a slower, less intense release that suits long soaks.

Pocketbook Impact and Storage

You’ll see flakes more often in smaller bags at hardware shops, and prills in bulk sacks. Flakes ship well but break down if they get wet from a leak or humidity—sometimes leaving a stubborn block stuck inside the bag. Prills shrug off dampness much better, so they store in barns or sheds through winter storms. That difference can mean less waste, especially for anyone who buys ahead and keeps a seasonal stash. On average, flakes cost a bit less per pound thanks to their larger, less processed form. If you’re spreading large amounts, the cost savings can matter, but the hassle of cleanup may not be worth the savings for small or frequent jobs.

Safety and Environmental Concerns

Magnesium chloride in either form is less harmful to pets and plants than other ice melts like rock salt, but good handling beats careless dumping. Prills produce less dust, so exposure risks are smaller if you already deal with breathing issues or allergies. Flakes need careful handling—try to avoid pouring close to your face, and always store in a dry place. Both types break down in soil and water, though repeated overuse near gardens still risks soil changes over time. If you need to protect a garden bed or livestock pen, stick with light, occasional application and watch for residue buildup.

Choosing the Right Magnesium Chloride for the Job

I’ve learned that ignoring the differences between prill and flake can turn a simple job into a tiring hassle. If speed and even melting steal your attention, flakes can’t be beat—just remember to keep them dry and handle with care. If you want steady supply for animals or less mess when carrying bags, prills stand out. In the end, the answer lies in matching your work habits and storage space to the right form, not just what the label says. That’s the advice I pass to neighbors every year, and it’s saved many a headache across seasons.

Where can I purchase Magnesium Chloride Prill and what packaging sizes are available?

Sourcing Magnesium Chloride Prill in Today’s Market

Countless people have started seeking magnesium chloride prill for everything from road de-icing to health and bath products. Some use it for soil improvement, others for dust control on gravel drives, and plenty swear by it for sore muscles. I went on a search last winter after reading up on the benefits, but it wasn’t as straightforward as an online supermarket run.

Most common retail locations—your typical hardware stores, farm supply shops, and gardening centers—carry some form of this salt, but the packaging tends to be aimed at the typical home project. Bags in these stores often range from 2 to 25 pounds, sometimes labeled for ice melt or dust suppression. If you’re after a small batch, say for bath soaks or DIY spa recipes, these smaller bags make sense. I saw brands like Dead Sea Works and OMRI-certified sources, but reading the fine print matters because not all "magnesium salts" come in the prilled texture needed for certain applications.

Bulk Options and Industrial Sources

For those running a larger operation—maybe a farm, a road maintenance crew, or a wellness center—the story changes a bit. Bulk purchases almost always mean you’ll need to track down agricultural or chemical suppliers online. Outfits like Brenntag, North American Salt, ChemicalStore, or Hill Brothers serve up magnesium chloride in sizes from 50-pound bags right up to supersacks (1,000-2,000 pounds). Local feed stores or co-ops occasionally place special orders for customers with larger needs. That route often brings better prices per pound, but be ready to deal with freight delivery and storage challenges.

Nobody loves paying for shipping on a ton of salt, though, so regional suppliers or local distributors can be the ticket. I once split a pallet with neighbors who wanted to tame the dust on our road, which took some organizing but chopped down the individual cost nicely. Shopping in bulk doesn’t have to mean warehouse-sized quantities for a single buyer—just a bit of teamwork.

Packaging Sizes You’ll Find

The range of packaging tends to split into a few common sizes. On the small end, bags start at just over a pound, designed for individual bathers and home gardeners. Mid-sized bags, 20 to 50 pounds, work for hobby farms, small municipalities, or folks dealing with a larger stretch of sidewalk or driveway in winter. The huge bags—called “supersacks” or “bulk bags”—hold anywhere from half a ton to a full ton. These bags need equipment for handling, so they’re not for every backyard.

Suppliers who care about quality mention things like purity percentage and origin (Chinese, Israeli, or domestic US production). Not everyone minds a little residue, but gardeners often want to avoid excess heavy metals or contamination. It helps to request a Certificate of Analysis from serious suppliers, especially for agricultural or health purposes.

Buy Smart, Stay Safe

Buying safe, effective magnesium chloride prill starts with reading product labels and asking questions. Reliable vendors do more than simply list a price—they know where their product comes from, and they offer different grades for de-icing, animal feed, or bath use. Over the past few years, Canadian and US producers have improved transparency, a response to buyers who care what lands on their driveway or in the garden.

In my experience, it pays to pick up the phone or send a message before ordering in bulk. Knowledgeable sales teams explain which grade fits your purpose and flag up any extra shipping costs before you buy. With a little homework and a bit of legwork, most folks end up with exactly the right bag—whether it’s hand-sized or big enough to fill a skid-steer.

Magnesium Chloride Prill
Magnesium Chloride Prill
Names
Preferred IUPAC name magnesium dichloride
Other names Magnesium Dichloride
Dichloromagnesium
E511
Magnesium Chloratum
Magnesium Chloride Hexahydrate
Pronunciation /mæɡˈniːziəm ˈklɔːraɪd prɪl/
Preferred IUPAC name Magnesium dichloride
Other names E511
Magnesium dichloride
Bischloride of magnesia
Magnesium chloride hexahydrate
Pronunciation /mæɡˈniːziəm ˈklɔːraɪd prɪl/
Identifiers
CAS Number 7791-18-6
Beilstein Reference 607958
ChEBI CHEBI:6636
ChEMBL CHEMBL1201110
ChemSpider 14016
DrugBank DB09444
ECHA InfoCard 03bb49d8-2f24-40e2-88bf-4229d6a1782c
EC Number 231-793-3
Gmelin Reference 63654
KEGG C31689
MeSH D008275
PubChem CID 24580
RTECS number OM2800000
UNII 7N46IW5W8E
UN number UN magnesium chloride prill does not have a UN number.
CAS Number 7791-18-6
Beilstein Reference 607873
ChEBI CHEBI:6636
ChEMBL CHEMBL1201081
ChemSpider 21510
DrugBank DB09466
ECHA InfoCard ECHA InfoCard: 029-004-00-0
EC Number 231-791-2
Gmelin Reference 22211
KEGG C00410
MeSH D016699
PubChem CID 5284359
RTECS number OM2800000
UNII VHN1H92N6Y
UN number UN 1418
Properties
Chemical formula MgCl2
Molar mass 95.21 g/mol
Appearance White prills
Odor Odorless
Density 0.9 g/cm³
Solubility in water Soluble in water
log P -1.55
Vapor pressure Negligible
Acidity (pKa) 8.3
Basicity (pKb) 7.0 – 9.0
Magnetic susceptibility (χ) −23.0×10⁻⁶ cm³/mol
Refractive index (nD) 1.378
Dipole moment 9.0 D
Chemical formula MgCl2
Molar mass 95.21 g/mol
Appearance White prills
Odor Odorless
Density 0.9 g/cm³
Solubility in water Highly soluble
log P -1.498
Vapor pressure Negligible
Acidity (pKa) 6.0
Basicity (pKb) 7.0 - 8.5
Magnetic susceptibility (χ) -1.2×10⁻⁴
Refractive index (nD) 1.378
Dipole moment 9.0 D
Thermochemistry
Std molar entropy (S⦵298) 89.6 J·mol⁻¹·K⁻¹
Std enthalpy of formation (ΔfH⦵298) -641.8 kJ/mol
Std molar entropy (S⦵298) 89.4 J/(mol·K)
Std enthalpy of formation (ΔfH⦵298) -641.83 kJ/mol
Std enthalpy of combustion (ΔcH⦵298) -641.8 kJ/mol
Pharmacology
ATC code A12CC05
ATC code A12CC05
Hazards
Main hazards Irritating to eyes, skin, and respiratory system.
GHS labelling GHS07, Warning, H319, P264, P305+P351+P338, P337+P313
Pictograms GHS07
Signal word Warning
Hazard statements H319: Causes serious eye irritation.
Precautionary statements Keep only in original container. Wash hands thoroughly after handling. Do not eat, drink or smoke when using this product. Wear protective gloves/protective clothing/eye protection/face protection.
NFPA 704 (fire diamond) 1-0-1-W
Autoignition temperature > 625°C
Lethal dose or concentration LD50 Oral Rat: 2800 mg/kg
LD50 (median dose) LD50 (oral, rat): 2800 mg/kg
NIOSH SCGA
PEL (Permissible) “10 mg/m3”
REL (Recommended) 200 mg
IDLH (Immediate danger) Not established
Main hazards May cause irritation to eyes, skin, and respiratory system.
GHS labelling GHS07, Warning, H319, P264, P280, P305+P351+P338, P337+P313
Pictograms GHS07, GHS09
Signal word Warning
Hazard statements May cause respiratory irritation.
Precautionary statements Keep container tightly closed. Wash thoroughly after handling. Avoid breathing dust/fume/gas/mist/vapors/spray. Use only outdoors or in a well-ventilated area. Wear protective gloves/eye protection/face protection.
NFPA 704 (fire diamond) 1-0-1
Lethal dose or concentration LD50 (oral, rat): 2800 mg/kg
LD50 (median dose) LD50 (median dose): 2800 mg/kg (Rat, oral)
NIOSH MGCL2
PEL (Permissible) PEL (Permissible Exposure Limit) for Magnesium Chloride Prill: Not established
REL (Recommended) 50-200 kg/ha
IDLH (Immediate danger) No IDLH established.
Related compounds
Related compounds Magnesium sulfate
Magnesium nitrate
Calcium chloride
Potassium chloride
Sodium chloride
Related compounds Magnesium sulfate
Magnesium oxide
Magnesium hydroxide
Calcium chloride
Potassium chloride