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Product Name: Tert-Butyl Peroxyisobutyrate
Other Names: Perester TBPIB, Peroxyisobutyrate t-butyl ester
Recommended Use: Industrial initiator in polymerizations
Supplier/Manufacturer: [Supplier Information Here]
Emergency Contact Number: [Emergency Phone Number Here]
CAS Number: 26748-41-4
UN Number: 3107
EC Number: 247-952-9
Classification (GHS): Organic Peroxide Type E, Acute Toxicity (Oral, Dermal), Eye Damage/Irritation, Specific Target Organ Toxicity Single Exposure
Pictograms: Flame, Exclamation Mark, Health Hazard
Signal Word: Danger
Hazard Statements: Heating may cause fire or explosion. Harmful if swallowed, causes skin and eye irritation. May cause respiratory irritation. Toxic to aquatic life with long lasting effects.
Precautionary Statements: Keep away from heat, open flames, sparks, hot surfaces. No smoking near product. Use personal protective equipment as required. Wash thoroughly after handling. Avoid release to environment.
Chemical Identity: Tert-Butyl Peroxyisobutyrate
Concentration: 52%–77%
CAS Number: 26748-41-4
Diluent Type B: ≥ 23% (hydrocarbon-based inert diluent)
Impurities: Trace organic peroxides and stabilizers present (typically less than 0.5%).
Hazardous Components: Tert-Butyl Peroxyisobutyrate contributes peroxide hazard; diluent functions as a flammable liquid.
Inhalation: Move exposed individual outdoors into fresh air. Support breathing and seek immediate medical attention if symptoms appear.
Skin Contact: Remove contaminated clothing and rinse skin thoroughly with water and mild soap. If redness, burning, or irritation occurs, seek medical advice.
Eye Contact: Rinse with plenty of water for at least 15 minutes, keeping eyelids open. Remove contact lenses if easy to do. Consult an ophthalmologist promptly.
Ingestion: Rinse mouth, avoid induced vomiting. Never give anything by mouth if unconscious. Call Poison Control Center or physician at once.
Most Important Symptoms: Respiratory distress, coughing, burning sensation, headache, dizziness, nausea, eye redness, skin irritation.
Suitable Extinguishing Media: Water spray, foam, dry powder. Do not use CO2 directly on fires involving peroxides.
Hazards from Combustion: Toxic fumes may evolve, including carbon oxides. Peroxide components may decompose explosively under intense heat.
Special Equipment: Firefighters require full-body chemical protective gear and self-contained breathing apparatus.
Advice for Firefighters: Cool containers with flooding quantities of water from safe locations. Evacuate area. Do not allow run-off from fire fighting to enter drains or water courses.
Unusual Fire/Explosion Hazards: Decomposition may induce violent rupture of sealed containers due to gas formation.
Personal Precautions: Evacuate unprotected personnel from area. Prevent skin and eye contact. Remove all ignition sources immediately. Don required PPE: gloves, goggles, flame-resistant suit.
Environmental Precautions: Prevent product from entering drains, sewers, waterways. Toxic to aquatic organisms even at low concentrations.
Spill Cleanup: Contain and absorb spill using inert non-combustible material (e.g., sand, earth). Use non-sparking tools. Place in a suitable, labeled container for disposal per local regulations.
Decontamination: Avoid use of cleaning agents that react with peroxides. Wash affected surface thoroughly with water before removing restricted area.
Secondary Prevention: Ensure proper ventilation. Restrict access to trained personnel until cleanup is complete.
Handling Practices: Use only in well-ventilated areas. Avoid direct sunlight, sources of heat, and shock. Do not open packages or handle material near ignition sources. Always ground containers when transferring material. Keep away from incompatible substances.
Safe Storage Conditions: Store in original container tightly closed and upright in a designated cool, dry, and well-ventilated peroxide-approved storage area (between 0°C and 30°C). Use explosion-proof equipment. Segregate from acids, alkalis, reducing agents, amines, and combustibles.
Incompatible Materials: Iron, copper, brass, strong acids, bases, reducing agents, organic materials.
Storage Recommendations: Avoid metal shelving. Use polyethylene or fiberglass secondary containment. Mark storage area with hazard signs. Rotate stock to minimize extended storage.
Control Parameters: No occupational exposure limits established for this substance by OSHA or ACGIH.
Engineering Controls: Use process enclosures, local exhaust ventilation, or other engineering controls to minimize airborne exposure.
Personal Protection: Wear chemical-resistant gloves (nitrile, butyl rubber), flame-retardant body clothing, safety goggles or face shield, closed-toe shoes, respiratory protection (organic vapor/particulate cartridge) if airborne concentration exceeds limits.
Hygiene Practices: Wash thoroughly before eating, drinking, or smoking. Remove contaminated clothing immediately. No contact lenses during use.
Environmental Controls: Avoid product release to the environment. Use spill containment and emergency wash stations nearby.
Appearance: Clear to pale yellow liquid
Odor: Slightly pungent, ester-like
Odor Threshold: Not established
pH: Not applicable (non-aqueous)
Melting Point/Freezing Point: Below −20°C
Boiling Point and Range: Approx. 170°C (decomposes before boiling)
Flash Point: About 28°C (closed cup)
Evaporation Rate: Not determined
Flammability: Flammable liquid and vapor
Explosion Limits: Not established
Vapor Pressure: Low at ambient temperature
Vapor Density: Heavier than air
Relative Density: Approx. 0.96–0.98 at 20°C
Solubility in Water: Insoluble
Partition Coefficient (n-octanol/water): No data available
Autoignition Temperature: Decomposes explosively on heating
Decomposition Temperature: Begins above 60°C
Viscosity: Low to moderate
Chemical Stability: Unstable under elevated temperatures, strong sunlight, contamination, or shock.
Reactivity: Contact with metals, acids, bases, or reducing agents causes rapid decomposition, possible fire or explosion.
Possibility of Hazardous Reactions: Self-accelerating decomposition. Violent exothermic reactions with incompatible substances.
Conditions to Avoid: Heat sources, friction, static electricity, ultraviolet light, contamination with dust or foreign materials.
Hazardous Decomposition Products: Carbon oxides, flammable vapors, hydrocarbons.
Polymerization Risk: Hazard of uncontrolled polymerization present in contamination scenarios.
Likely Exposure Routes: Inhalation, skin contact, eye contact, ingestion.
Acute Toxicity: Moderate oral and dermal toxicity; ingestion may cause nausea, vomiting, dizziness, CNS effects. Inhalation of vapors irritates nose and throat.
Skin Corrosion/Irritation: Prolonged or repeated skin contact may cause redness, dryness, and inflammation.
Serious Eye Damage/Irritation: Liquid or vapor causes irritation, possible severe injury.
Respiratory Sensitization: May cause transient respiratory irritation, cough.
Chronic Effects: Repeated exposure may lead to defatting of skin, dermatitis.
Carcinogenicity/Mutagenicity/Reproductive Toxicity: No clear evidence, but peroxides as a class need cautious handling.
Symptoms of Overexposure: Burning sensation, cough, headache, dizziness, nausea, eye watering, skin redness.
Ecotoxicity: Harmful to aquatic organisms, may cause long-term negative effects in aquatic environments.
Persistence and Degradability: Organic peroxides degrade into alcohols, acids, and gases; process may not be rapid.
Bioaccumulation Potential: Low to moderate potential anticipated.
Mobility in Soil: Limited by poor solubility, but some migration in case of spills on permeable ground.
Other Adverse Effects: Breakdown products can contribute to oxygen depletion in water; persistent residue dangerous to aquatic life for extended periods.
Product Disposal: Incinerate only at government-approved hazardous waste facilities equipped to manage organic peroxides. Do not dispose down the drain or in household waste.
Container Disposal: Cleaned empty containers must be triple rinsed and then punctured or crushed for recycling or landfill in accordance with local regulations.
Contaminated Waste: Handle any spill material, rags, and personal protective equipment as hazardous waste. Package in tightly sealed, compatible containers for transport.
Regulatory Requirements: Label all disposal containers clearly. Secure all waste to prevent unauthorized access or accidental ignition.
UN Number: 3107
UN Proper Shipping Name: ORGANIC PEROXIDE TYPE E, LIQUID (Tert-Butyl Peroxyisobutyrate, ≤ 77%)
Transport Hazard Class: 5.2 (Organic peroxide)
Packing Group: II
Marine Pollutant: Yes
Special Transport Precautions: Never transport with acids, alkalis, combustibles, or foodstuffs. Use only approved, ventilated vehicles. Protect from physical damage, direct sunlight, temperature over 30°C.
Labeling: Display “Organic Peroxide” and marine pollutant placards during transport.
Labeling Regulations: GHS, OSHA Hazard Communication Standard, EU CLP regulated, requires “Danger” signal word and standardized pictograms.
Inventory Status: Listed in TSCA, REACH (Annex XVII, restricted use), AICS, DSL, and other major chemical inventories.
Restriction Status: Subject to handling and storage controls under OSHA, EPA SARA Title III, and EU Seveso Directive.
SARA 313 Chemical: Not applicable
Right-to-Know Act: Listed in various state hazardous substance lists.
Other Requirements: Emergency response plan and safety training for all users. Safety data sheets must be available at the point of use.
