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Product Name: Tert-Butyl Peroxy-2-Methylbenzoate
Chemical Family: Organic Peroxide
Synonyms: TBPMB, 1,1-Dimethylethyl peroxy o-toluate
Chemical Formula: C12H16O3
CAS Number: 614-45-9
Recommended Use: Polymerization initiator, crosslinking agent in plastics and rubber
Supplier Information: Contact safety office or manufacturer for current details
Emergency Contact: Refer to product label or local hazardous response center
Classification: Organic peroxide Type D, Acute toxicity Oral Category 4, Skin irritation Category 2, Eye irritation Category 2A
Signal Word: Danger
Hazard Statements: Heating may cause a fire; Harmful if swallowed; Causes skin and serious eye irritation
Pictograms: Flame, Exclamation Mark
Precautionary Statements: Store in a cool place, avoid contact with incompatible materials, keep container tightly closed, use only non-sparking tools, wear protective gloves and eye protection, avoid breathing vapors
Physical Hazards: May detonate if heated, friction or impact
Health Hazards: Causes strong eye, skin, and mucous membrane irritation, possible allergic reactions, ingestion can cause nausea, vomiting
Environmental Hazards: Harmful to aquatic organisms, causes long-term adverse effects
Chemical Name: Tert-Butyl Peroxy-2-Methylbenzoate
CAS Registry Number: 614-45-9
Concentration: ≤100%
Impurities/Additives: No significant impurities relevant for classification
Molecular Weight: 208.26 g/mol
Stabilizers: None typically present unless specifically indicated by supplier
Inhalation: Move exposed person to fresh air, seek immediate medical attention if symptoms persist, support breathing if necessary
Skin Contact: Remove contaminated clothing, rinse affected area with plenty of water for at least 15 minutes, wash with soap, seek medical advice for persistent irritation
Eye Contact: Rinse slowly and gently with water for at least 15 minutes, remove contact lenses if present and easy to do, get medical help immediately
Ingestion: Rinse mouth thoroughly, do not induce vomiting, seek immediate medical advice, never give anything by mouth to an unconscious person
Acute/Delayed Symptoms: Redness, pain, swelling, tearing, headache, nausea
Suitable Extinguishing Media: Water spray, foam, dry chemical, carbon dioxide, avoid direct water jet
Unsuitable Media: CO2 sometimes ineffective against large fires of organic peroxides
Specific Hazards: Organic peroxides decompose violently under heat, risk of explosion and emission of toxic fumes (carbon oxides, acrid smoke)
Protective Equipment: Self-contained breathing apparatus, full protective gear, keep cool containers away from fire zone
Advice for Firefighters: Move containers from fire area if safe, douse unaffected drums with water to keep cool, retreat immediately if rising sound or venting observed
Decomposition Products: Carbon monoxide, carbon dioxide, hydrocarbons
Personal Precautions: Evacuate area, ventilate if possible, prevent direct contact, use full protective equipment including goggles and gloves
Environmental Precautions: Avoid entry into waterways, drains, sewers, notify authorities as required
Methods for Cleanup: Remove all sources of ignition, collect spill into non-combustible containers using inert absorbent (vermiculite, dry sand), place in chemical waste drums, do not reuse unwashed tools
Decontamination: Wash area with water and detergent, ventilate
Prevention of Secondary Hazards: Use spark-proof tools, stay upwind during removal
Handling: Handle away from heat, sparks, open flames, use only in well-ventilated areas, prevent build-up of electrostatic charges, wear suitable PPE, avoid stirring or grinding substance
Hygiene Measures: Wash thoroughly after handling, do not eat or drink while using, keep away from eyes, skin, clothing
Storage: Store in tightly closed container, cool, dry, well-ventilated area, segregate from reducing agents, acids, alkalis, heavy metal compounds, refrigerate if possible, secure against accidental knock-over
Incompatible Materials: Direct sunlight, strong oxidizers, combustible materials, metal powders, strong acids/bases
Special Rules: Limit container stacking, display hazard warnings on storage areas
Occupational Exposure Limits: Not established for TBPMB, general organic peroxide guidelines may apply
Engineering Controls: Use chemical fume hoods, explosion-proof ventilation where risk identified, emergency eyewash and showers should be available nearby
Respiratory Protection: Use approved mask (organic vapor/particulate cartridge or supplied air respirator for high concentrations)
Hand Protection: Chemical-resistant gloves (nitrile, neoprene)
Eye Protection: Splash-proof goggles, face shield for high-risk operations
Skin Protection: Lab coat or apron, full clothing coverage
Monitoring Guidelines: Regular area air monitoring for vapor buildup, periodic reassessment after spills or container compromise
Appearance: Colorless to pale yellow oily liquid
Odor: Slight, aromatic
pH: Not applicable (insoluble in water)
Boiling Point: Decomposes before boiling
Melting Point: Not precisely known; decomposes with heat
Flash Point: Estimated 113°C (235°F) (closed cup)
Decomposition Temperature: Below 100°C with violent reaction risk
Auto-ignition Temperature: Not specified, high risk above decomposition temperature
Vapor Pressure: Low at ambient temperature
Solubility: Insoluble in water; soluble in most organic solvents
Vapor Density: Heavier than air
Relative Density: ~1.06 (water = 1)
Evaporation Rate: Not established
Partition Coefficient (log Kow): Not available
Viscosity: Not specified
Explosive Properties: Sensitive to heat, shock, friction
Chemical Stability: Unstable if heated, undergoes exothermic decomposition rapidly above 60°C
Hazardous Reactions: Decomposes explosively under confinement or in presence of strong accelerators
Incompatible Materials: Reducing agents, acids, bases, metal oxides, combustible substances
Conditions to Avoid: Heat, flames, sunlight, confined spaces, physical shock
Hazardous Decomposition Products: Carbon oxides, methylbenzoic acid derivatives, flammable gases, irritant smoke
Polymerization: Will not occur under recommended storage conditions
Likely Routes of Exposure: Inhalation, skin absorption, ingestion, eye contact
Acute Toxicity: LD50 (oral–rat): approx. 250-400 mg/kg
Skin Corrosion/Irritation: Causes moderate to strong irritation on contact, risk of sensitization after prolonged exposure
Serious Eye Damage/Irritation: Rapid inflammation, pain, possibly lasting damage
Respiratory Sensitization: Inhalation causes cough, soreness, sometimes asthma-like symptoms
Long-Term Effects: No comprehensive data, repeated exposure suspected to damage skin, eyes, possible liver/kidney
Carcinogenicity: Not officially classified, no clear evidence found
Mutagenicity: No robust data, avoid chronic exposure
Reproductive Toxicity: Not assessed, avoid exposure during pregnancy
Ecotoxicity: Toxic to aquatic organisms, can cause long-term environmental harm
Mobility: Not volatile, binds rapidly to organic matter
Persistence and Degradability: Not readily biodegradable, can persist in soils and water if not treated
Bioaccumulation Potential: Low to moderate, but breakdown products may concentrate
Other Adverse Effects: No known ozone depletion potential, avoid uncontrolled release into the environment
Waste Treatment Methods: Dispose by controlled incineration at licensed facility, never pour down drain or mix with household waste
Container Disposal: Empty containers must be decontaminated, never reuse for food or cosmetics
Precautions for Disposal: Keep waste sealed, labeled, store separately from incompatible materials, contact licensed waste contractor familiar with hazardous organic peroxides
Prohibited Disposal Methods: Avoid landfill dumping, uncontrolled burning, mixing with oxidizable materials
UN Number: UN 3109
Proper Shipping Name: Organic peroxide Type D, liquid (Tert-Butyl Peroxy-2-Methylbenzoate)
Transport Hazard Class: 5.2 (organic peroxide)
Packing Group: II
Labels Required: Organic peroxide, marine pollutant as applicable
Special Precautions for User: Keep separate from food, feed, acids, flammables, temperature controls needed
EmS (maritime): F-J, S-R
Transport in Bulk: Follow IMDG, IATA, ADR, DOT rules, consult carrier
Environmental Hazards: Marine pollutant
US TSCA Inventory: Listed
OSHA (HazCom): Regulated as hazardous material
SARA Title III (Sections 311/312): Immediate health, fire hazard
EPA (CERCLA): Not assigned specific RQ
EU EINECS/ELINCS: Listed
REACH: Require registration for workplace use
Canada DSL/NDSL: Included
Other Local/International Regulations: National and regional chemical inventories may apply, workplace exposure regulations enforced by local authorities, handle per chemical hygiene guidelines
Restriction: Not included as a known carcinogen, mutagen, or reproductive toxin under major chemical laws, specific use restrictions may apply in sectors such as pharmaceuticals, agriculture, or consumer goods
