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Product Name: Tert-Butyl Peroxy-2-Ethylhexyl Carbonate
Synonyms: TBPEHC, 2-Ethylhexyl carbonate, tert-butylperoxy ester
CAS Number: 34443-12-4
Recommended Uses: Industrial polymerization initiator, crosslinking agent
Supplier Details: Chemical manufacturer contact information with address and 24-hour emergency phone number
Emergency Overview: Clear to pale yellow liquid with faint odor, highly reactive, strong oxidizer, potential explosion risk
GHS Classification: Organic Peroxides Type D, Acute Toxicity (oral, dermal, inhalation) Category 4, Skin Corrosion/Irritation Category 2, Serious Eye Damage/Irritation Category 2, Specific Target Organ Toxicity (single exposure) Category 3
Label Elements: Signal Word: Danger; Pictograms: Flame, Exclamation Mark
Hazard Statements: Heating may cause fire or explosion; causes skin and eye irritation; harmful if swallowed, inhaled, or absorbed through skin; may cause respiratory irritation
Precautionary Statements: Avoid all sources of ignition or static discharge; wear flame-resistant protective clothing; do not eat, drink, or smoke near product; wash hands thoroughly after handling; use only outdoors or in a well-ventilated area
Other Hazards: Vapors may cause dizziness or nausea; product decomposes with vigorous gas release; sensitization possible with regular exposure
Chemical Identity: Tert-Butyl Peroxy-2-Ethylhexyl Carbonate
CAS Number: 34443-12-4
EC Number: 251-995-2
Concentration: 90–100%
Impurities/Stabilizers: Proprietary stabilizers < 10 ppm; water < 0.1%; trace hydroperoxides
Inhalation: Move person to fresh air immediately, keep warm and quiet, monitor for breathing difficulties, seek medical attention if symptoms develop.
Skin Contact: Remove contaminated clothing, rinse affected skin with plenty of running water and mild soap, do not rub skin, flush area for at least 15 minutes, transport to medical facility if irritation persists.
Eye Contact: Hold eyelids apart, rinse eyes continuously with water for 20 minutes, remove contact lenses after first few minutes, seek complex ophthalmological evaluation promptly.
Ingestion: Rinse mouth with water, do not induce vomiting, never give anything by mouth if victim is unconscious, immediate hospital assessment needed.
Advice to Physicians: Symptomatic treatment; monitor for chemical pneumonitis, hypoxia, and severe skin/eye burns; treat for exposure to organic peroxides.
Suitable Extinguishing Media: Dry sand, foam, CO2, water spray (fog only to avoid spreading), avoid direct water stream due to risk of spattering and decomposition.
Fire Hazards: Rapid heating or mechanical shock may trigger violent decomposition; vapors may form explosive mixtures with air; combustion releases highly toxic gases (carbon monoxide, carbon dioxide, oxides of nitrogen).
Special Protective Equipment: Full firefighting turnout gear including self-contained breathing apparatus, chemical resistant suit and gloves.
Firefighting Instructions: Evacuate area, fight fire from maximum safe distance, cool unopened containers with water spray, use unmanned hoses whenever possible, approach from upwind.
Unusual Fire/Explosion Hazards: Sealed container rupture possible under fire conditions; avoid contact with combustible materials, metal powders, heavy contamination.
Personal Precautions: Evacuate unprotected personnel, restrict access, wear chemical splash suit, butyl rubber gloves, face shield, positive-pressure respirator.
Environmental Precautions: Prevent entry to drains, sewer systems, waterways—contain spill using inert absorbing material like vermiculite or diatomaceous earth.
Methods for Clean-Up: Absorb with dry, non-combustible material; transfer to well-ventilated open container using non-sparking tools; avoid contamination with acids, oxides, reducing agents; collect and label for hazardous waste disposal.
Reporting Requirements: Notify environmental authorities if large release presents fire/explosion risk or risk to watercourse; document incident for local regulatory review.
Safe Handling Advice: Use only in chemical fume hood or explosion-proof area, ground all equipment, eliminate ignition sources, handle with insulated tools, dispense smallest volume possible, avoid physical impact or friction.
Hygiene Recommendations: Remove contaminated PPE before leaving area, regular laundering of clothing, refrain from smoking, eating, or drinking in work area.
Storage Conditions: Store in original, vented containers at 2–8°C (refrigerated), isolated from direct sunlight, incompatible chemicals, sources of heat or static electricity.
Incompatible Materials: Strong acids, alkali metals, oxidizing and reducing agents, combustible substances, heavy metal compounds.
Storage Containers: Use only approved, properly labeled, corrosion-resistant vessels with pressure relief capability.
Occupational Exposure Limits: No specific OSHA, NIOSH, or ACGIH standards; treat as hazardous material, exposure aim: keep airborne concentrations below 0.1 ppm.
Engineering Controls: Explosion-proof ventilation system, ducted chemical fume hoods, process area sensors for temperature, vapor concentration and peroxide decomposition.
Personal Protective Equipment: Impervious gloves (butyl, Viton), chemical splash goggles, full-face shield, flame-resistant lab coat, closed footwear, PAPR or SCBA in high exposure risk.
Respiratory Protection: Air-purifying respirator with organic vapor/acid gas cartridge or equivalent, always check filter expiration, switch to supplied air options for emergencies.
Other Protection: Emergency showers and eyewash stations within 10 m of workstation.
Appearance: Clear to very pale yellow liquid
Odor: Faint, sweet, ester-like
Odor Threshold: Not established
pH: Not applicable
Melting Point/Freezing Point: -30°C
Boiling Point/Range: Decomposes before boiling above 120°C
Flash Point: 50°C (closed cup, c.c.)
Evaporation Rate: Not measured
Flammability (solid, gas): Flammable—organic peroxide
Upper/Lower Flammability Limits: Not determined
Vapor Pressure: ~1.2 hPa at 20°C
Vapor Density: Not evaluated
Relative Density: 0.97–1.02 g/cm³ at 20°C
Solubility(ies): Insoluble in water, soluble in most organic solvents (alcohols, ethers)
Partition Coefficient n-octanol/water: Not determined
Auto-Ignition Temperature: 280–310°C
Decomposition Temperature: 110–120°C
Viscosity: 14–18 mPa·s at 20°C
Chemical Stability: Unstable under heat, impact or contamination—decomposes exothermically, potential for violent reaction.
Conditions to Avoid: Friction, heat, sunlight, open flames, electromagnetic fields, shock loading.
Incompatible Materials: Concentrated acids, alkali, reducing agents, heavy metals, transition metal salts, dirt.
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, acetic acid, tert-butanol, flammable gases.
Polymerization: Not susceptible; thermal decomposition hazard dominates.
Routes of Exposure: Inhalation, skin and eye contact, accidental swallowing
Acute Toxicity: Oral (rat) LD50 ~350 mg/kg; Dermal (rabbit) LD50 ~450 mg/kg
Skin Corrosion/Irritation: Causes severe irritation; risk of burns with prolonged exposure
Serious Eye Damage/Irritation: High risk of burns, corneal opacity
Respiratory Sensitization: May trigger bronchospasm in predisposed individuals
Chronic Effects: Prolonged or repeated skin exposure may cause dermatitis or sensitization
Carcinogenicity/Mutagenicity/Reproductive Toxicity: No evidence in current literature, but avoid all unnecessary exposure
Symptoms: Nausea, headaches, skin redness, blistering, eye watering, respiratory discomfort, drowsiness
Ecotoxicity: Harmful to aquatic organisms (acute LC50 fish < 10 mg/L), significant risk with even limited spills
Persistence and Degradability: Rapidly decomposes in environment via hydrolysis and photolysis, forms low molecular weight organics
Bioaccumulative Potential: Low—organic peroxide instability limits persistence in fat or soil
Mobility in Soil: Moderate migration through subsoil possible, but likely to degrade before contaminating groundwater
Other Adverse Effects: Toxic breakdown products can stress aquatic species; regulators require strict containment and spill response planning
Waste Disposal Methods: Classified as hazardous waste under federal/state/local laws; send only to authorized incineration facility equipped to handle peroxides; never landfill
Packaging Disposal: Triple or pressure-rinse inner packaging, remove labeling, treat as hazardous regardless of contents
Precautions for Disposal: Always neutralize small spills immediately using peroxides-dedicated quenching method; do not wash down drains or sewer
Disposal in Accordance With: Local, regional, national, international laws (including EPA RCRA, EU REACH, ADR, IMDG, IATA)
UN Number: UN 3115
UN Proper Shipping Name: Organic peroxide type D, liquid (tert-Butyl peroxy-2-ethylhexyl carbonate)
Transport Hazard Class(es): 5.2 (Organic peroxide)
Packing Group: II
Emergency Response Guide Number: 145
Special Precautions for Transport: Keep at prescribed temperature; use only certified vehicles/containers; isolation from foodstuffs, feed, and incompatible chemicals
Regulatory Requirements: Placarding, documented chain of custody, pre-notification to authorities for large shipments
Environmental Hazards: Marine pollutant if released in bulk; notify competent authority following any loss or spill en route
Regulatory Status: Subject to strict regulation under OSHA Process Safety Management Standard; listed on TSCA Chemical Substance Inventory, REACH Annex IV, Canadian DSL/NDSL
Labelling Requirements: GHS-compliant signal word, hazard pictograms, risk and safety statements conspicuously displayed; access to full SDS required for all users
Restrictions: Prohibited for direct sale to consumers; industrial users must train workers on safe management under chemical safety plan
Other Relevant Legislation: CERCLA (release thresholds), SARA Title III reporting, EU CLP Regulation
Worker Protection: All facilities require written emergency response, first aid and fire-fighting SOP, regular drills; compliance monitoring via workplace inspection and chemical inventory audit
