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Product Name: Tert-Amyl Peroxypentanoate
Synonyms: Pentanoic acid, 4,4-dimethyl-1,2,3-trioxopentane, Diluted with Type B
Product Use: Initiator for polymerization reactions or crosslinking in plastics and rubbers
Manufacturer: Information available on packaging or product documentation
Emergency Phone: Local emergency response numbers and manufacturer contact lines provide direct support during incidents
CAS Number: 67587-25-1
UN Number: 3107, applicable for transport and emergency response referencing
GHS Classification: Organic Peroxide Type D, Skin Irritant Category 2, Eye Irritant Category 2, Acute Toxicity Category 4 (oral)
Label Elements: Flame, exclamation mark, and corrosion pictograms signal primary hazards
Signal Word: Danger
Hazard Statements: Heating may cause fire or explosion; causes skin and eye irritation; may be harmful if swallowed
Precautionary Phrases: Store away from sparks/open flames/hot surfaces; wear protective gloves/clothing/eye protection; avoid breathing vapors
Potential Health Effects: Eyes: Severe irritation, redness, blurred vision possible; Skin: Irritation, redness, swelling; Inhalation: Sore throat, coughing; Ingestion: Stomach pain, nausea, vomiting
Chemical Name: Tert-Amyl Peroxypentanoate
CAS Number: 67587-25-1
Concentration: ≤ 77%
Diluent Type B: Proprietary composition, balance to 100% (≥ 23%)
Impurities: None present at concentrations classified as hazardous under relevant regulations
Eye Contact: Flush eyes under running water for at least 15 minutes while holding eyelids open; seek medical attention if irritation persists
Skin Contact: Remove contaminated clothing immediately, rinse skin with plenty of water, contact a physician for persistent irritation or burns
Inhalation: Move affected person to fresh air, keep at rest, provide oxygen if breathing is difficult, seek medical help for prolonged symptoms
Ingestion: Rinse mouth, never attempt to induce vomiting, seek immediate medical attention, provide product container or label if available
Other Information: Treat symptomatically based on observed effects, support vital functions where required
Suitable Extinguishing Media: Dry chemical powder, foam, carbon dioxide; do not use water jet as it could spread flaming material
Hazards from Combustion: May emit toxic fumes including carbon monoxide, carbon dioxide, and various volatile organic byproducts
Special Protective Equipment: Firefighters require self-contained breathing apparatus and full protective gear
Precautions: Remove sources of heat/ignition, evacuate area, keep containers cool by spraying water in a safe manner to prevent pressure build-up or explosion
Unusual Fire/Explosion Hazards: Product is an organic peroxide, capable of violent decomposition or deflagration when heated
Personal Precautions: Evacuate non-essential personnel, ventilate area, wear personal protective gear such as gloves, goggles, flame-resistant clothing
Environmental Precautions: Prevent entry into sewers or waterways, contain with sand, earth, or inert absorbents, avoid disposal with combustible materials
Clean-Up Procedures: Collect spilled material with non-combustible absorbent, place in tightly sealed approved waste container, label for hazardous waste disposal
Decontamination: Wash contaminated surface with water/detergent, dispose washings as hazardous waste
Emergency Procedures: Notify authorities as appropriate, restrict area until cleanup complete
Handling Procedures: Open containers slowly and carefully, use only in well-ventilated areas, avoid friction, shock, and impact
Precautions: Do not breathe vapors or allow contact with skin or eyes, avoid contamination with incompatible materials such as acids, bases, or reducing agents
Storage Conditions: Store in original container tightly closed, in a cool, dry, well-ventilated and flame-proof location away from sunlight and other sources of heat
Incompatibles: Keep away from accelerators, heavy metal compounds, combustible or oxidizing substances, reducing agents
Other Information: Maintain temperature below 30°C to minimize decomposition risk, practice stock rotation to use oldest material first
Occupational Exposure Limits: No established permissible exposure limit (PEL) or threshold limit value (TLV) for this specific peroxide, control exposure by engineering means
Engineering Controls: Use closed systems, explosion-proof ventilation, local exhaust at points of vapor release
Personal Protective Equipment: Eyes: Safety goggles/face shield; Hands: Chemical-resistant gloves (nitrile or neoprene); Clothing: Flame-retardant long sleeves and trousers; Respiratory: Use approved organic vapor respirator if airborne concentration expected
Hygiene Measures: Wash hands thoroughly after handling, remove and wash contaminated clothing before reuse, keep food and beverages away from work area
Appearance: Clear to slightly yellowish oily liquid
Odor: Slightly pungent, characteristic organic peroxide smell
Boiling Point: Decomposes before boiling
Melting Point: Below 0°C, liquid at room temperature
Flash Point: Approximately 60°C (closed cup, varies with diluent)
Autoignition Temperature: Around 200°C
Decomposition Temperature: Begins about 70°C, rapid at higher temperatures
Solubility: Insoluble in water, soluble in most organic solvents
Density: 0.97–1.05 g/cm³ at 20°C
Vapor Pressure: Low at room temperature
Viscosity: Moderately viscous
Chemical Stability: Unstable at higher temperatures, product highly sensitive to heat, contamination, and friction
Conditions to Avoid: Heat, sunlight, open flames, sparks, shock, and physical impact
Incompatible Materials: Acids, bases, reducing agents, metal salts, combustibles, strong oxidizers
Decomposition Products: Releases hazardous gases upon decomposition including carbon oxides, flammable organic vapors, and other irritants
Possibility of Hazardous Reactions: Violent decomposition can occur, risk of explosion if confined and heated above safe limits
Likely Routes of Exposure: Skin and eye contact, inhalation, ingestion
Acute Effects: Irritation of skin, eyes, respiratory tract, may cause systemic toxicity if ingested
Chronic Effects: Prolonged or repeated exposure could lead to skin sensitization, dermatitis
LD50 (Oral, Rat): Estimated at 500–2000 mg/kg
Carcinogenicity: No evidence from current studies, not listed by IARC/NTP/OSHA
Mutagenicity: Not classified as mutagenic based on available data
Other Effects: Sensitization not expected with standard precautions, but possible with long exposure or improper use
Ecotoxicity: Harmful to aquatic organisms, may cause adverse effects in water environments; avoid unintentional release
Persistence and Degradability: Limited persistence due to instability, decomposes in sunlight and at room temperature
Bioaccumulative Potential: Low, due to rapid breakdown; unlikely to accumulate in aquatic or terrestrial food chains
Mobility in Soil: Mobile in soil, but decomposes to less hazardous products before significant migration
Other Adverse Effects: Careful containment and proper disposal prevent unwanted environmental impact
Waste Disposal Methods: Collection in specialized containers for incineration or chemical treatment by licensed waste handlers
Container Disposal: Empty packaging should be triple-rinsed, punctured for disposal, and not reused or incinerated with other wastes
Legal Compliance: Follow regional, national, and local hazardous waste regulations; consult environmental agencies for guidance
Precautions: Never mix with combustibles or pour down drains
Reporting Requirements: Document all disposal events, and notify applicable regulatory bodies if large releases or emergencies occur
UN Number: 3107
Proper Shipping Name: Organic peroxide type D, liquid (Tert-Amyl Peroxypentanoate, solution)
Transport Hazard Class: 5.2 (Organic Peroxide)
Packing Group: II
Labeling: Required hazard indicia: "Organic Peroxide," flame symbol, emergency response info provided
Marine Pollutant: Yes, hazardous to the environment
Special Precautions: Protect from heat and direct sunlight, maintain upright position during transportation, follow carrier and regulatory safety protocols
Inventory Listings: Listed on major chemical inventories (TSCA, EINECS, DSL)
OHS Regulations: OSHA hazardous chemical requiring safety training and risk communication
Labeling Requirements: GHS/OSHA-compliant, pictograms, signal words, hazard, and precautionary statements in plain language
Reporting Requirements: Immediate reporting of significant spills, workplace release, or exposures as per CERCLA/SARA guidelines
Other Considerations: Maintain up-to-date safety training, documentation, and access to MSDS at points of use and storage
