Material Safety Data Sheet: Calcium Chloride Flake

1. Identification

Product Name: Calcium Chloride Flake
Other Names: Dihydrate, Anhydrous Calcium Chloride
Recommended Use: De-icing, dust control, concrete acceleration, brine production
Supplier: Name and address of supplier used locally
Contact Information: Emergency phone numbers, non-emergency contact information for supplier and manufacturer
CAS Number: 10043-52-4 (anhydrous), 10035-04-8 (dihydrate)
UN Number: 1748 (Calcium Chloride, Anhydrous)

2. Hazard Identification

Classification: Irritant to eyes, skin, and respiratory system
GHS Label Elements: Caution symbol, exclamation mark
Signal Word: Warning
Hazard Statements: Causes serious eye irritation, harmful if swallowed, may cause skin irritation
Precautionary Statements: Avoid contact with eyes, skin, and clothing; do not ingest; wash thoroughly after handling; use only with proper ventilation

3. Composition / Information on Ingredients

Chemical Name: Calcium Chloride
Formula: CaCl₂
Concentration: 77-80% for flake form
Other Components: Trace amounts of sodium chloride, magnesium chloride, water of crystallization (dihydrate)
CAS Number: 10043-52-4 (CaCl₂ anhydrous), 10035-04-8 (CaCl₂·2H₂O dihydrate)

4. First Aid Measures

Inhalation: Move to fresh air, seek medical attention if symptoms persist
Eye Contact: Rinse immediately with plenty of water for at least 15 minutes, remove contact lenses if present, get medical attention
Skin Contact: Remove contaminated clothing, rinse exposed skin with water and soap, seek medical help if irritation continues
Ingestion: Rinse mouth thoroughly with water, do not induce vomiting, give small quantities of water, seek medical attention
Symptoms: Irritation of eyes, mouth, and throat, coughing, mild burns with prolonged exposure

5. Fire-Fighting Measures

Suitable Extinguishing Media: Use dry chemical, foam, carbon dioxide or water spray according to surrounding material
Unsuitable Extinguishing Media: None known specific to this product
Specific Hazards: Reacts with water to generate heat, can decompose at high temperatures forming chlorine gas
Protective Equipment for Firefighters: Wear full protective gear and self-contained breathing apparatus
Firefighting Procedure: Contain runoff, cool containers exposed to fire with water spray

6. Accidental Release Measures

Personal Precautions: Wear protective gloves, goggles, and clothing; avoid breathing dust
Environmental Precautions: Prevent product from entering drains, watercourses, or soil
Spill Cleanup Methods: Sweep up and place in a suitable container for disposal, use non-sparking tools, flush area with water afterward
Release to Watercourses: Notify appropriate authorities if contamination occurs

7. Handling and Storage

Handling: Handle in a well-ventilated space, avoid generating dust, avoid direct contact with skin and eyes, wash hands after use
Storage Conditions: Store in a cool, dry, well-ventilated area, keep away from moisture and incompatible materials such as strong acids
Packaging: Use corrosion-resistant containers with well-fitting lids
Special Requirements: Do not store near food or feed, keep container tightly closed when not in use

8. Exposure Controls and Personal Protection

Engineering Controls: Use local exhaust ventilation to minimize dust exposure
Control Parameters: No established occupational exposure limit for calcium chloride, TWA should be considered for nuisance dust
Personal Protection: Safety goggles, chemical resistant gloves, long-sleeved clothing, dust mask or respirator (P2 type)
Hygiene Measures: Do not eat, drink, or smoke while handling; change clothes if dust exposure is significant

9. Physical and Chemical Properties

Appearance: White flakes, granules, or powder
Odor: Odorless
pH (1% solution): 8.0–10.0
Melting Point: 772°C (anhydrous)
Boiling Point: 1600°C
Solubility: Highly soluble in water; exothermic dissolution
Density: 2.15 g/cm³
Hygroscopicity: Readily absorbs moisture from air
Vapor Pressure: Not applicable

10. Stability and Reactivity

Chemical Stability: Stable under normal conditions, deliquescent on air exposure
Thermal Decomposition: Releases hydrogen chloride gas at very high temperatures
Reactivity: Reacts vigorously with water and acids
Incompatible Materials: Strong acids, zinc, bromide trifluoride
Hazardous Polymerization: Will not occur

11. Toxicological Information

Routes of Exposure: Inhalation, skin contact, ingestion, eye contact
Acute Toxicity: Oral LD₅₀ (rat) 1000 mg/kg
Health Effects: Irritating to eyes, respiratory tract and skin; ingestion can cause gastrointestinal irritation, hypercalcemia in sensitive individuals
Chronic Effects: Prolonged skin contact may worsen pre-existing skin disorders
Carcinogenicity: Not classified as carcinogenic by IARC, NTP, OSHA or ACGIH

12. Ecological Information

Ecotoxicity: Toxic to aquatic life in high concentrations, especially freshwater organisms
Persistence and Degradability: Dissolves readily, dissociates to calcium and chloride ions
Bioaccumulative Potential: Low, not likely to bioaccumulate
Mobility in Soil: High, moves easily with water
Other Adverse Effects: May increase soil salinity, disrupt plant growth if released in large amounts

13. Disposal Considerations

Waste Treatment Methods: Use approved disposal contractors; landfill as non-hazardous waste; comply with local and national regulations
Waste Packaging: Empty containers can be recycled or disposed of following thorough cleaning
Precautions: Avoid dispersal in environment, do not allow to enter surface water or sewage system

14. Transport Information

UN Number: 1748 (anhydrous), not regulated for dihydrate form
UN Proper Shipping Name: Calcium Chloride
Transport Hazard Class: Class 9 (Miscellaneous) for certain forms
Packing Group: III
Environmental Hazards: Not classified as marine pollutant
Special Precautions for User: Avoid moisture ingress in transit, secure load to prevent shifting

15. Regulatory Information

TSCA (US): Listed
REACH (EU): Registered
OSHA Hazards: Irritant
Right to Know Act: Included on state and federal lists where relevant
SARA Title III: Not subject to reporting requirements
Canadian WHMIS: Included, classified as an irritant
Other International Inventories: Listed or exempted in most major chemical inventories