MSDS for 2,5-Dimethyl-2,5-Bis(T-Butyl Peroxide) Hexyne-3 Enox Yne

Identification

Product Name: 2,5-Dimethyl-2,5-Bis(T-Butyl Peroxide) Hexyne-3 Enox Yne
Chemical Family: Organic peroxide
Synonyms: No commonly used synonyms
Recommended Use: Polymerization initiator, specialty chemical synthesis
Supplier: Industrial chemical distributors, specialty peroxide manufacturers
Emergency Contact: Local poison control centers, company safety representative
CAS Number: 78-63-7
UN Number: 3106 (organic peroxide type D, liquid)

Hazard Identification

Physical Hazards: High risk of explosion, intense flammability, can decompose violently at elevated temperature or by accidental impact
Health Hazards: May cause severe skin and eye irritation, inhalation can result in respiratory distress, ingestion may damage internal organs
Environmental Hazards: Toxic to aquatic life, possible long-term adverse effects in the aquatic environment
Classification: Organic Peroxide Type D (explosive), Acute Toxicity—oral (Category 4), Skin Irritant (Category 2), Eye Damage (Category 1)
Label Elements: Hazard pictograms for explosion, human health, environmental risk
Signal Word: Danger
Hazard Statements: Heating may cause a fire or explosion. Causes skin irritation. Causes serious eye damage. Harmful if swallowed. Very toxic to aquatic organisms.

Composition / Information on Ingredients

Chemical Name: 2,5-Dimethyl-2,5-Bis(T-Butyl Peroxide) Hexyne-3 Enox Yne
Concentration: More than 98% pure (technical grade)
Impurities: Hydrocarbon residues, minor peroxidic contaminants (less than 2%)
Additives: No stabilizers intentionally added
Molecular Formula: C16H30O4
Molecular Weight: 286.41 g/mol

First Aid Measures

Inhalation: Immediately move to fresh air, call for medical assistance if symptoms of coughing, dizziness, or shortness of breath occur
Skin Contact: Flush with soap and plenty of water for at least 15 minutes, remove contaminated clothing, seek medical attention if irritation persists
Eye Contact: Rinse cautiously with water for several minutes, keep eyelids open, call a physician without delay
Ingestion: Rinse mouth, do not induce vomiting, get immediate medical help
Acute Effects: Burning sensation in eyes and throat, blistering, stomach pain, headache, chest tightness
Delayed Effects: Sensitization and chemical burns on prolonged exposure

Fire-Fighting Measures

Suitable Extinguishing Media: Dry sand, water spray, alcohol-resistant foam, avoid using dry chemicals or CO₂ due to risk of violent decomposition
Unsuitable Extinguishing Media: Halogenated agents, dry powder
Specific Hazards: Risk of explosion under fire conditions, vapors may travel and ignite remotely, intense heat will speed decomposition
Protective Equipment: Self-contained breathing apparatus, complete fire-resistant clothing
Firefighting Instructions: Cool containers with flooding amounts of water from a safe distance, evacuate area, contain runoff to prevent environmental contamination
Decomposition Products: Carbon monoxide, carbon dioxide, flammable gases, possible ketones and alcohols

Accidental Release Measures

Personal Precautions: Evacuate unnecessary personnel, avoid breathing vapors, prevent contact with skin and eyes, wear full protective gear including chemical-resistant gloves and face shield
Environmental Precautions: Do not let spill enter drains or natural waterways, cover with inert material, contain run-off
Methods for Cleaning Up: Use non-sparking tools, absorb spill with vermiculite or dry sand, collect into safe, closed containers for disposal, ventilate area thoroughly, clean surfaces with detergents after substance removal
Disposal: Prevent mixture with combustibles or reducing substances, transfer to authorized waste facility under strict supervision

Handling and Storage

Precautions for Safe Handling: Handle with care, avoid shock, friction, heat, or static discharge, use only in well-ventilated locations, ground all equipment
Storage Conditions: Store in cool, well-ventilated, dedicated organic peroxide storage area, keep away from direct sunlight, ignition sources, strong acids and bases, store at recommended temperature (below 30°C)
Compatible Packaging: Only use approved containers, segregate from oxidizable and combustible materials
Other Practices: Post clear warning signs, maintain small inventories, keep safety shower and eyewash station nearby

Exposure Controls and Personal Protection

Occupational Exposure Limits: No established OSHA or ACGIH limits for this substance, minimize exposure by all available means
Engineering Controls: Use local exhaust ventilation, explosion-proof electrical fixtures, regular air monitoring for peroxides
Personal Protective Equipment: Splash goggles, chemical-resistant gloves (butyl rubber, nitrile), flame-resistant laboratory coat, respiratory protection where airborne vapor is present
Hygiene Measures: Wash hands and exposed skin after handling, avoid eating, drinking, or smoking during work, remove contaminated protective gear before leaving area

Physical and Chemical Properties

Appearance: Clear to pale yellow oily liquid
Odor: Slight, sweet odor (peroxidic)
Odor Threshold: Not determined
pH: Not applicable (non-aqueous)
Melting Point/Freezing Point: -20°C to -15°C
Boiling Point/Range: Decomposes before boiling at standard pressure
Flash Point: Less than 20°C (closed cup)
Evaporation Rate: Not specified
Flammability (solid, gas): Highly flammable liquid
Upper/Lower Flammability Limits: Not established
Vapor Pressure: Low at room temperature
Vapor Density: Heavier than air
Relative Density: About 0.9 (water = 1)
Solubility: Insoluble in water, soluble in most organic solvents (ethers, alcohols)
Partition Coefficient: Not measured
Auto-ignition Temperature: Around 120°C
Decomposition Temperature: Starts at 80°C
Viscosity: Moderately viscous at 20°C

Stability and Reactivity

Chemical Stability: Thermally unstable, decomposes rapidly with heat or contamination
Reactivity: Reacts violently with strong acids, bases, reducing agents, heavy metal compounds
Hazardous Reactions: Explosive decomposition triggered by friction, impact, heat, or exposure to incompatible materials
Conditions to Avoid: Temperatures over 30°C, open flames, sunlight, static discharge, contamination
Incompatible Materials: Combustible materials, organic chemicals, iron salts, copper, amines
Hazardous Decomposition Products: Oxides of carbon, toxic organic fumes, possible alkanes and lower peroxides

Toxicological Information

Acute Toxicity: Harmful by ingestion (oral LD50 in rats: 600 mg/kg), moderate inhalation risk
Skin Corrosion/Irritation: Causes skin irritation, sensitization with repeated contact
Serious Eye Damage/Irritation: Causes irreversible eye damage, risk of blindness
Respiratory Sensitization: May cause coughing, chest tightness, or difficulty breathing
Long-Term Exposure: Not classed as a carcinogen, possible reproductive toxicity not fully evaluated
Symptoms: Nausea, vomiting, abdominal discomfort, redness, swelling, drop in blood pressure on large exposure
Other Data: Prolonged or repeated contact increases risks of allergic reactions or long-term tissue damage

Ecological Information

Ecotoxicity: Highly toxic to aquatic organisms (LC50 for fish: <0.1 mg/l)
Persistence and Degradability: May persist in the environment, limited biodegradation
Bioaccumulation Potential: Expected to have low potential due to moderate water insolubility, but direct data lacking
Mobility in Soil: Poor mobility due to volatility and low solubility, risk of groundwater contamination if spilled
Other Adverse Effects: Breakdown products also hazardous, major risk if released into rivers or lakes

Disposal Considerations

Waste Treatment Methods: Treated as hazardous chemical waste, dispose under direct supervision of qualified personnel
Incineration: Only suitable in specialized licensed facilities with peroxide waste approval
Contaminated Packaging: Triple-rinse, puncture, and deliver to hazardous waste disposal
Prevent Environmental Release: Do not dump in nature or municipal sewers, avoid incinerators without scrubbers
Other Notes: Residues and spill cleanup materials must follow full hazardous-waste protocol

Transport Information

UN Number: 3106
Proper Shipping Name: Organic peroxide type D, liquid
Transport Hazard Class: 5.2 (organic peroxide)
Packing Group: II
Marine Pollutant: Yes
Labels Required: Explosive, organic peroxide, marine pollutant
Special Transport Precautions: Temperature-controlled transport, secondary containment, immediate notification if a spill occurs
Other Instructions: Segregate from food, incompatible chemicals, avoid mechanical shocks during transport

Regulatory Information

OSHA Status: Classified as a hazardous substance
TSCA (Toxic Substances Control Act): Listed
SARA Title III: Section 302, 304, 311/312 Hazard Categories: Fire hazard, sudden release hazard
RCRA (Resource Conservation and Recovery Act): U-listed hazardous waste
State Regulations: Subject to California Proposition 65 (developmental toxicity concern)
Other Approvals: Classified as environmentally hazardous under EPA, subject to strict local and international transport and storage laws