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Product Name: N-Butyl 4,4-Bis(tert-Butylperoxy)valerate
Common Names: Valeric acid, 4,4-bis(tert-butylperoxy)-, n-butyl ester
CAS Number: 13122-18-4
Recommended Use: Polymerization initiator
Supplier Details: Manufacturer contact information supplied on request, including address, phone, and emergency contact number
Emergency Numbers: Poison control hotlines and fire/emergency contacts available on regional MSDS sheets
GHS Classification: Organic Peroxides Type E, Acute Toxicity (Oral) Category 4, Skin Irritation Category 2, Eye Irritation Category 2A
Signal Word: Warning
Hazard Statements: Combustible, may cause skin and eye irritation, poses ingestion and inhalation risks, may cause respiratory irritation, risk of fire if exposed to heat or friction
Pictograms: Flame, exclamation mark
Precautionary Statements: Avoid breathing dust or vapor, wash hands after handling, wear protective gloves, eye and face protection necessary, store away from heat sources, maintain good ventilation, keep away from food and drink
Chemical Identity: N-Butyl 4,4-Bis(tert-Butylperoxy)valerate
Component: N-Butyl 4,4-Bis(tert-Butylperoxy)valerate – up to 52%
Inert Solids: Non-reactive carrier, at least 48% by mass
Other Components: Trade secret stabilizers, less than 2% combined
Impurities: Peroxide decomposition by-products may be present in trace amounts, manufacturing impurities controlled within safe limits
Eye Contact: Immediately flush eyes with low-pressure water for at least 15 minutes, seek medical attention if irritation continues, do not rub eyes
Skin Contact: Remove contaminated clothing, wash skin thoroughly with soap and water, seek medical advice if symptoms persist
Inhalation: Move to area with fresh air, keep patient warm and at rest, monitor for irritation or breathing difficulty, contact emergency services if symptoms occur
Ingestion: Do not induce vomiting, rinse mouth, give only small quantities of water if patient is conscious, seek prompt medical attention
Overview: Symptomatic measures recommended; bring MSDS to physician if possible
Suitable Extinguishing Media: Dry chemical, foam, or water spray recommended, CO2 in limited scenarios
Unsuitable Media: Direct water jet may spread contents
Specific Hazards: Product releases flammable vapors, oxidizing potential can intensify fire, decomposition releases toxic gases such as carbon monoxide, carbon dioxide, and possibly peroxy acids
Protective Equipment: Self-contained breathing apparatus and full protective clothing required for firefighters
Firefighting Guidance: Cool containers with water spray from safe distance, clear area of all unprotected persons, be aware of container rupture risk
Personal Safety Measures: Evacuate unnecessary personnel, provide adequate ventilation, prevent dust generation, avoid inhalation and skin contact by using personal protective gear
Environmental Precautions: Prevent product spillage into drains, surface and ground water; alert authorities if significant quantities enter watercourses or public sewers
Spill Cleanup: Remove ignition sources, utilize non-sparking tools, collect spilled material with inert absorbent material (sand, sawdust), transfer to secure waste container, avoid using combustible cleaning agents, decontaminate spill area thoroughly
Disposal: Dispose of waste in accordance with local, regional, and national regulations
Decontamination: Wash area with plenty of water, ventilate space before re-entry
Handling Procedures: Wear chemical-resistant gloves and eye protection, avoid all sources of heat and ignition, handle in well-ventilated areas, keep containers tightly closed outside of use
Storage Conditions: Store in original, clearly labeled containers in a cool, dry, well-ventilated location away from direct sunlight and incompatible materials such as acids, bases, reducing agents, heavy metals
Special Requirements: Do not stack heavy objects on containers, maintain separation from food/stimulants, ensure secondary containment or spill trays for large quantities
Incompatibility: Keep away from strong reducing agents, combustible materials, acids, iron, copper
Airborne Exposure Limits: Occupational exposure limits not broadly established; recommend limiting exposure below 1 mg/m3 as a precaution
Engineering Controls: Use local exhaust ventilation systems, maintain air exchange close to point of generation
Personal Protection: Nitrile or PVC gloves, safety goggles, face shield for splash risk, antistatic and flame-retardant clothing, suitable respiratory protection if dust or vapor exceeds acceptable levels
Hygiene Measures: Wash hands, face, and forearms after handling and before eating, drinking, or smoking, remove contaminated clothing and clean separately
Physical State: Off-white to light yellow solid or paste
Odor: Mild, sweetish organic perfume
pH: Not applicable (non-aqueous dispersion)
Melting Point: Estimated between 40°C and 60°C
Boiling Point: Decomposition occurs before boiling
Flash Point: Approximately 75°C (closed cup)
Explosion Limits: Not determined; risk of violent decomposition
Vapor Pressure: Low at 20°C
Solubility in Water: Insoluble
Partition Coefficient (log Kow): Not readily available
Viscosity: Not determined
Density: Approximately 1.0–1.2 g/cm3 depending on solid content
Chemical Stability: Stable at recommended storage temperatures below 30°C, decomposes under heat, friction, or contamination
Reactivity: Can react vigorously with reducing agents, strong acids, and bases
Possibility of Hazardous Reactions: Risk of runaway decomposition with heat, incompatible materials, or accidental mixing; can cause fire or explosion
Incompatible Materials: Metals (iron, copper, brass), fuels, organic materials, acids, bases, accelerators
Decomposition Products: Carbon monoxide, carbon dioxide, flammable and irritating organic vapors, possibly peroxy acids on break down
Acute Toxicity: Ingestion may cause gastrointestinal distress, headaches, dizziness; inhalation may trigger nose and throat irritation
Skin Contact: Can cause moderate irritation, redness, or dermatitis
Eye Contact: Irritation, lacrimation, stinging, possible corneal damage on prolonged exposure
Chronic Effects: Repeated exposure may sensitize skin, long-term effects not fully studied in humans, based on related peroxides
Carcinogenicity: No current classification as a human carcinogen by IARC, ACGIH, NTP, or OSHA
Other Data: No evidence of mutagenicity or reproductive toxicity from limited animal testing, but caution advised
Ecotoxicity: May present moderate hazard to aquatic ecosystems due to peroxide action; fish and daphnia: estimated LC50 in low mg/l range
Persistence and Degradation: Organic peroxides are typically reactive in the environment; degraded by sunlight, hydrolysis not rapid
Bioaccumulation Potential: Low based on chemical properties, unlikely to build up
Mobility: Low water solubility; likely to bind to soil particles
Other Adverse Effects: Spills can depress oxygen levels in water bodies, impact aquatic organisms
Waste Handling: Treat as hazardous organic peroxide waste, use approved incineration or chemical treatment by licensed disposal contractors
Container Disposal: Rinse thoroughly before discarding or recycling; puncture prevents reuse
Regulations: Follow all local, regional, and national hazardous waste regulations, avoid landfill whenever possible
Precaution: Never dispose of with regular garbage, prevent environmental release
UN Number: 3107
Proper Shipping Name: Organic Peroxide Type E, Solid (N-Butyl 4,4-Bis(tert-butylperoxy)valerate < 52%)
Hazard Class: 5.2 (Organic peroxide)
Packing Group: II
Label Requirements: Organic Peroxide, flame symbol
Transport Precautions: Keep cool, prevent vibration/shock, segregate from food, acids, bases, and other chemicals, do not stack; transport in compliance with local and international DG regulations (IMDG, IATA, DOT)
Regulatory Status: Covered under national chemicals inventory and workplace safety regulations (OSHA, REACH, TSCA, WHMIS, etc.)
Classification Codes: Controlled as hazardous under GHS, OSHA, European CLP
Reporting Requirements: Included in SARA Title III and CERCLA lists for some jurisdictions, notification required for large accidental releases
Labeling: Must meet GHS/OSHA standards for hazard communication
Worker Rights: Right to know laws and training required, access to safety data and appropriate protective measures at all times
