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Product Name: Tert-Butyl Peroxyisobutyrate
Chemical Formula: C12H22O4
Synonyms: TBPIB, Peroxyisobutyric acid tert-butyl ester
Recommended Use: Organic peroxide for polymerization processes
Supplier Details: Manufacturer or distributor details with address and emergency contact number
CAS Number: 26748-41-4
UN Number: 3109
Emergency Phone: Local country-specific emergency number or manufacturer’s 24-hour hotline
Classification: Organic peroxide, type D; Flammable liquid; Skin irritant; Serious eye irritant; May cause respiratory irritation
Signal Word: Danger
Hazard Statements: Heating may cause fire or explosion. Causes skin and eye irritation. May irritate respiratory tract. Harmful if swallowed.
Pictograms: Flame over circle (oxidizer), exclamation mark
Precautionary Statements: Keep away from heat, sparks, open flames, and hot surfaces. Avoid breathing vapors or mists. Use personal protective equipment. Keep container tightly closed.
Chemical Name: Tert-Butyl Peroxyisobutyrate
Concentration: Up to 52%
Chemical Name: Diluent Type B (hydrocarbon or phthalate mixture)
Concentration: Minimum 48%
Impurities: Trace stabilizers or proprietary diluent blends
Inhalation: Move to fresh air right away. Support breathing if trouble starts. Seek medical attention if cough, dizziness, or irritation lingers.
Skin Contact: Wash exposed skin with lots of water and gentle soap. Remove contaminated clothing. If redness or pain persists, get medical advice.
Eye Contact: Flush eyes gently but thoroughly with water for at least 15 minutes, holding eyelids open. Remove contact lenses if present. See an eye doctor for any discomfort.
Ingestion: Rinse mouth. Do not induce vomiting. Drink small amounts of water if conscious. Head to the nearest health facility immediately.
Suitable Extinguishing Media: Use foam, dry chemical, or carbon dioxide. Water spray can cool containers but avoid direct jet.
Special Hazards: Burning produces irritating, toxic fumes and may trigger explosive decomposition. Runoff could catch fire.
Protective Equipment: Firefighters must wear full protective gear and a self-contained breathing apparatus.
Precautions: Approach fire from upwind side. Remove containers from area if possible without risk. Cool neighboring containers with water to prevent pressure buildup or explosion.
Personal Precautions: Evacuate unnecessary personnel. Ventilate area. Use appropriate protective equipment including gloves, goggles, face shield, and respiratory protection if vapors exceed exposure limits.
Environmental Precautions: Keep spilled material out of drains, water courses, and soil. Notify authorities if large amounts enter the environment.
Clean-Up Methods: Contain and absorb spills with non-flammable, inert materials like earth or sand. Use non-sparking tools. Collect residue in suitable, clearly labeled containers for disposal. Wash area with water after clean-up.
Handling: Always ground and bond containers when transferring material. Handle gently and keep away from friction, impact, and static electricity. Maintain good ventilation. Avoid direct contact with eyes, skin, and clothing.
Storage: Store in a cool, dry, and well-ventilated place away from direct sunlight, heat, and incompatible substances like strong acids, bases, or reducing agents. Use corrosion-resistant containers with vented caps. Separate from food, feed, and combustible materials. Keep inventory rotation tight to prevent aging.
Occupational Exposure Limits: No established workplace exposure limits, but minimize exposure as much as possible.
Engineering Controls: Use explosion-proof ventilation and closed systems. Install local exhaust at chemical handling sites.
Personal Protective Equipment: Wear nitrile or neoprene gloves, chemical-resistant goggles, and flame-retardant lab coats or overalls. Use respiratory protection if engineering controls fail to keep vapor concentrations below safe limits.
Hygiene Measures: Wash hands before breaks and after work. Don’t eat, drink, or smoke near chemicals. Remove clothing that gets wet or heavily soiled with this substance.
Appearance: Clear, colorless to pale yellow liquid
Odor: Slight ester-like
Boiling Point: Not determined (decomposes before boiling)
Melting Point: Below -10°C
Flash Point: Approximately 60°C (closed cup; varies with diluent)
Auto-Ignition Temperature: 180°C
Decomposition Temperature: 60–80°C (depends on storage)
Solubility: Insoluble in water; dissolves in organic solvents
Vapor Pressure: Moderate at room temperature
Density: 0.92–0.95 g/cm³ at 20°C
Viscosity: 2–5 mPa·s at 20°C
Explosive Properties: Organic peroxide; sensitive to shock, heat, and friction
Chemical Stability: Stable only when kept below recommended temperature, in original packaging with diluent.
Hazardous Reactions: Risk of violent decomposition if heated, shocked, or contaminated with incompatible substances like metals, strong acids, or bases.
Conditions to Avoid: Avoid heat, sunlight, open flames, electrical sparks, and pressure.
Incompatible Materials: Combustible materials, strong oxidizers, reducing agents, acids, bases, and heavy metals.
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, volatile organic acids, and other toxic fumes.
Acute Toxicity: Oral LD50 in rats about 2,000 mg/kg. Exposure may cause mouth, throat, and stomach upset, vomiting, and diarrhea.
Skin Corrosion/Irritation: Prolonged or repeated contact irritates skin, causing redness and pain.
Eye Damage/Irritation: Strong irritation and possible damage to eyes with redness, watering, and pain.
Respiratory Effects: Vapors may irritate nose, throat, and lungs, trigger coughing, and make breathing difficult.
Sensitization: No reliable evidence for skin or respiratory sensitization.
Chronic Effects: Not well studied at workplace exposures.
Carcinogenicity/Mutagenicity: Not listed by NTP, OSHA, or IARC as carcinogenic. No sufficient animal data for mutagenic or reproductive toxicity.
Ecotoxicity: Harmful to aquatic life, especially at high concentrations. Aquatic invertebrates and fish affected most.
Persistence and Degradability: Readily decomposes in the environment; diluent may persist longer. Main risk arises from oxygen release and breakdown products.
Bioaccumulative Potential: Moderate for diluent; low for active peroxide.
Mobility in Soil: Highly mobile if spilled on land, may contaminate groundwater.
Other Adverse Effects: Not expected to bioaccumulate in food chains. Rapid breakdown may lower long-term risk with proper handling.
Waste Treatment Methods: Collect in clearly marked containers away from other waste types. Incinerate in a chemical waste facility licensed for organic peroxides, or contact a hazardous waste contractor.
Precautions for Disposal: Do not pour down drains, sewer systems, or landfill. Neutralize only under professional supervision.
Contaminated Packaging: Clean thoroughly before reusing or recycling. Dispose fully emptied and rinsed containers as hazardous waste.
UN Number: 3109
Proper Shipping Name: Organic peroxide type D, liquid (Tert-Butyl Peroxyisobutyrate, diluted)
Transport Hazard Class: 5.2 (Organic Peroxide)
Packing Group: II
Labels/Placards: Dangerous for transport; requires "Organic Peroxide" mark. Requires emergency cooling during transport in hot climates.
Transportation Precautions: Ship only by trained personnel with approved carriers. Use temperature-controlled vehicles if outside safe range. Secure containers to prevent spills or leaks.
OSHA Status: Regulated as hazardous; included under the Process Safety Management (PSM) standard due to reactivity.
EPA Status: Subject to reporting under SARA Title III. Must not be discharged to environment without prior treatment.
EU REACH: Requires registration, strict handling, and reporting based on intended use.
Other Regulations: Seveso Directive (EU), WHMIS (Canada), or equivalent local law covers organic peroxide transport, storage, and workplace safety.
Label Requirements: Global Harmonization Standard hazard pictograms, signal words, and precautionary statements follow local chemical safety law.
Other Information: Safety reviews, auditing, and training for workers remain key parts of compliance. Community right-to-know rules may call for reporting storage quantities to local emergency authorities.
