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Name: Tert-Butyl Peroxypivalate
Concentration: Active ingredient ≤32%, Type A Diluent ≥68%
Chemical Family: Organic peroxide mixture
Common Uses: Initiator in polymerization processes, industrial chemical synthesis
Manufacturer Contact: Details of manufacturer, emergency contact phone
Synonyms: Peroxydipivaloyl tert-butyl
Product Code: Typically assigned by suppliers
Recommended Use: Industrial only, not for consumer or food use
Restrictions: Avoid use outside of regulated environments
Globally Harmonized System Classification: Organic peroxide, Type C; Flammable liquid; Acute toxicant, oral and dermal
Signal Word: Danger
Hazard Statements: May cause fire or explosion; strong oxidizer. Toxic if swallowed, in contact with skin or inhaled. Causes skin and eye irritation.
Pictograms: Exploding bomb, skull and crossbones, exclamation mark
Routes of Exposure: Inhalation, skin contact, ingestion, eye contact
Precautionary Statements: Keep away from heat, hot surfaces, sparks, open flames, and all ignition sources. Wear protective gloves, protective clothing, eye and face protection. Do not breathe vapors or mists.
Chemical Name: Tert-Butyl Peroxypivalate
Concentration: 28–32%
CAS Number: 614-45-9
Type A Diluent: 68–72% (typically mineral oil or similar carrier; supplier will specify exact type)
Impurities: Less than 2% (trace stabilizers, water)
Molecular Formula: C9H18O4 for the active peroxide component
Inhalation: Remove person to fresh air, keep comfortable, seek medical attention if breathing difficulties or symptoms persist
Skin Contact: Remove contaminated clothing, rinse thoroughly with soap and water; seek medical attention for irritation or burns
Eye Contact: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing. Seek immediate medical attention
Ingestion: Rinse mouth. Do not induce vomiting. Immediate medical attention required; danger of aspiration into lungs
Most Important Symptoms and Effects: Severe respiratory symptoms, chemical burns, vomiting, dizziness, headache, skin and eye irritation; delayed effects may occur after exposure
Notes to Physician: Treat symptomatically. Monitor for respiratory distress and chemical burns
Extinguishing Media – Suitable: Dry chemical, carbon dioxide, foam (do not use water jets directly on burning product)
Fire Hazards: Decomposes under heat, releasing flammable and toxic gases (including carbon monoxide, carbon dioxide, acetic acid); explosion risk
Advice for Firefighters: Full protective gear and self-contained breathing apparatus required; approach from upwind to avoid exposure to vapors and fumes
Special Precautions: Cool closed containers exposed to fire with water spray
Combustion Products: Irritating, toxic gases, dense smoke, possible explosive fragments
Personal Precautions: Evacuate area and restrict access, provide adequate ventilation, wear appropriate personal protective equipment (PPE), avoid inhalation and contact
Environmental Precautions: Prevent further leakage or spillage if safe. Do not let product enter drains, sewers, or watercourses
Containment and Cleanup: Absorb with inert material (vermiculite, sand). Collect and place in approved container for disposal, avoid use of combustible material for cleanup. Clean area thoroughly, ventilate until vapors dissipate
Emergency Procedures: Notify local regulatory authorities for significant spill, follow institution protocol for hazardous materials
Safe Handling: Use only in well-ventilated, explosion-proof areas; avoid all sources of ignition; avoid contact with incompatible materials (acids, bases, reducing agents, combustible substances)
Personal Protection: Full chemical-resistant suit, gloves, safety goggles, face shield, proper respiratory protection if ventilation inadequate
Other Precautions: Do not breathe vapor or mist; do not eat, drink, or smoke while handling
Storage Conditions: Keep container tightly closed in a cool, dry, well-ventilated, secure chemical storage area, out of direct sunlight, maintained at recommended temperature (below 30°C), away from heat, sparks, and open flames
Packaging Materials: Only store in original or approved containers resistant to organic peroxides; do not reuse container for other materials
Exposure Limits: No specific occupational exposure limit established; minimize exposure as with all organic peroxides
Engineering Controls: Local exhaust ventilation, closed system processes, proper storage; explosion-proof equipment preferred
Personal Protective Equipment: Resistant gloves (nitrile, neoprene), full coveralls, chemical splash goggles, face shield, appropriate respiratory protection if handling large quantities or insufficient ventilation
Hygiene Measures: Always wash hands after handling, before eating or drinking; launder contaminated clothing before reuse
Monitoring: Air monitoring for peroxides or flammable vapors in work area
Appearance: Clear, colorless or pale yellow liquid
Odor: Slightly pungent, faint chemical or ester-like smell
Odor Threshold: Not established; irritating at higher concentrations
pH: Not relevant for non-aqueous solution
Melting Point/Freezing Point: Approx. -30°C
Boiling Point: Active peroxide decomposes before boiling; but diluent flash point typically >60°C
Flash Point: 56–61°C (depends on diluent)
Flammability: Highly flammable liquid and vapor
Vapor Pressure: 16 hPa at 20°C
Vapor Density: Heavier than air
Solubility: Insoluble in water, miscible with many organic solvents
Partition Coefficient (n-octanol/water): Not provided
Decomposition Temperature: Begins at approximately 60°C
Viscosity: Similar to light oil
Chemical Stability: Stable below recommended storage temperature, sensitive to light and heat; rapidly decomposes at elevated temperatures, risk of explosion or fire
Reactivity: Strong oxidizer, reacts violently with incompatible materials such as strong acids, bases, reducing agents, and combustibles
Hazardous Reactions: Exothermic self-accelerating decomposition, may cause rupture of closed containers
Conditions to Avoid: Heat, open flames, ignition sources, contamination with incompatible materials, direct sunlight, physical shock or friction
Incompatible Materials: Strong acids, alkalis, amines, heavy metal compounds, combustibles
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, oxides of nitrogen and various organic acids
Acute Toxicity: Oral LD50 in rats: 200–500 mg/kg (toxic); Skin LD50: 500–1000 mg/kg; inhalation may cause respiratory tract irritation, dizziness, headache, drowsiness
Skin Irritation: Causes moderate to severe irritation, potential burns with prolonged exposure
Eye Irritation: Severe irritation or corrosive effects
Inhalation: Toxic, may cause coughing, respiratory distress, dizziness, nausea
Sensitization: Product may cause allergic skin reaction with repeated exposure
Chronic Toxicity: Prolonged exposure may cause organ damage; repeated dermal exposure raises risk of dermatitis
Carcinogenicity, Mutagenicity, Reproductive Toxicity: Not classified by IARC, NTP or OSHA; no specific evidence of carcinogenicity
Ecotoxicity: Harmful to aquatic organisms, risk of long-term adverse effects in aquatic environment
Persistence and Degradability: Not readily biodegradable, peroxides break down to simpler compounds but some diluents may persist, consult product literature
Bioaccumulative Potential: Low predicted bioaccumulation, but diluent fraction may persist
Mobility in Soil: Expected to have low mobility due to partitioning into organic phase
Other Adverse Effects: Avoid discharge into environment; product decomposes to carbon dioxide, acetic acid, and t-butanol among other compounds
Waste Treatment Methods: Must be incinerated or disposed of in accordance with local, state, and federal environmental control regulations; hazardous waste classification
Product Disposal: Do not dispose of in trash or sewer. Contact licensed waste disposal company
Container Disposal: Empty container may contain residue, treat as hazardous. Do not reuse; follow regulatory requirements for disposal
Special Considerations: Prevent contamination of surfaces or groundwater during disposal
UN Number: UN 3107
UN Proper Shipping Name: Organic peroxide type C, liquid (Tert-Butyl Peroxypivalate ≤32% with Type A diluent)
Transport Hazard Class: 5.2 (Organic peroxides)
Packing Group: II (Medium danger)
Labels: Organic peroxide, Flammable
Special Precautions for Transport: Protect from shock, heat, pressure or direct sunlight. Use only authorized transport carriers, avoid transport with incompatible substances
Marine Pollutant: Yes, per IMDG
Emergency Response Guide Number: 145
Occupational Safety and Health Administration (OSHA): Regulated as hazardous chemical
TSCA Status: Included in US Toxic Substances Control Act (TSCA) Inventory
European Regulations (REACH): Registration status must be checked with supplier, subject to restrictions on peroxides
WHMIS Classification (Canada): Class B (flammable/combustible material), Class D (toxic material), Class F (dangerously reactive)
EPA CERCLA Reportable Quantity: Not established, but spills must be reported locally
SARA Title III - Sections 302/313: Subject to notification and reporting
International Inventories: Listed on EINECS/ELINCS, AICS, DSL, IECSC, ENCS, PICCS, NZIoC
Other Applicable Regulations: Transportation of Dangerous Goods Act, OSHA Hazard Communication Standard, Globally Harmonized System (GHS) for classification and labeling
