© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Product Name: Tert-Butyl Peroxystearyl Carbonate
Synonyms: peroxy stearyl carbonate, tert-butyl ester peroxide
Chemical Family: Organic peroxide
Recommended Use: Polymerization initiator, crosslinking agent
Manufacturer: Industrial chemical producer with certified distribution chains
Emergency Contact: Refer to local poison control or CHEMTREC for regional emergency numbers
CAS Number: 995-33-5
Classification: Organic peroxide Type E, combustible, self-reactive
Health Hazards: Skin irritant, causes moderate reddening and discomfort; Eyes: causes severe irritation, risk of permanent damage; Inhalation: may irritate respiratory tract, trigger coughing, dizziness
Environmental Hazards: Highly toxic to aquatic life with long-lasting effects
Signal Word: Danger
Hazard Pictograms: Flame, exclamation mark, health hazard, environmental hazard
Precautionary Statements: Store locked up, avoid release to environment, keep away from heat, sparkle, open flame, hot surfaces; use protective equipment, wash exposed skin thoroughly,
Label Elements: Contains tert-butyl peroxystearyl carbonate, may intensify fire—oxidizer, causes serious eye damage
Chemical Name: Tert-Butyl Peroxystearyl Carbonate
Concentration (%): ≤ 100%
CAS Number: 995-33-5
Impurities/Stabilizers: Mixture may contain minute levels of stabilizer (antioxidant) or mineral oil, exact composition varies by supplier batch—consult certificate of analysis for precise diagnostic levels.
Eye Contact: Flush gently with water for a minimum 15 minutes, lifting eyelids as needed; call a physician at once. Carry safety data if transfer to clinic or emergency facility occurs.
Skin Contact: Remove any contaminated clothing, wash skin using soap and running water; do not use solvents on skin. If irritation or redness persists, see medical professional.
Inhalation: Move affected individual to fresh air. Seek immediate medical advice if persistent coughing, labored breathing, or dizziness arises.
Ingestion: Rinse mouth thoroughly; do not induce vomiting unless directed by poison control. Obtain medical evaluation promptly.
Acute/Delayed Symptoms: Burning sensation, eye damage, blistering, respiratory tract distress, stomach discomfort from accidental ingestion.
Suitable Extinguishing Media: Use water spray, large quantities of water, dry chemical (Class D powder), or foam as available on scene.
Unsuitable Media: Carbon dioxide not supported due to possible gas formation or pressure build-up.
Hazardous Combustion Products: Carbon monoxide, carbon dioxide, complex organic fumes
Firefighting Precautions: Approach upwind, keep uninvolved personnel away. Ensure full turnout gear with self-contained breathing apparatus (SCBA). Cool containers exposed to fire with water spray from a sheltered location.
Explosion Hazards: May explode if confined, heated, or subjected to impact. Spontaneous decomposition risk rises quickly above room temperature.
Personal Precautions: Evacuate area; prevent unprotected personnel entry. Wear chemical-resistant gloves, safety goggles, and positive pressure respirator.
Environmental Precautions: Block drain access and stop material from reaching water supply, soils, or sewers.
Clean-Up Methods: Use tools with non-sparking properties. Scoop up spilled solid without creating dust, transfer to open container for disposal. Contaminated surfaces should be washed with detergent and copious water.
Decontamination: Wipe up residues using damp cloth—dispose of all cleanup materials as hazardous waste. Ventilate area thoroughly before re-entry.
Safe Handling advice: Always handle away from flame, ignition sources, static, and strong oxidizers or reducing agents. Avoid crushing, dropping, or rough handling. Do not open container unnecessarily.
Storage Requirements: Store in air-tight original containers under refrigeration (2–8°C). Keep drums upright, segregated from flammable or decomposable acids. Ensure ventilation and temperature monitoring are functional.
Incompatible Materials: Bases, strong acids, metal salts, combustible materials including packaging or cleaning rags.
Special Precautions: Label clearly, train handlers in emergency response, store away from sunlight and moisture.
Exposure Limits: No established OSHA/ACGIH exposure limits. Minimize exposure as much as possible.
Engineering Controls: Install adequate local ventilation, explosion-proof exhaust where feasible.
Eye Protection: Chemical splash goggles, face shield if risk of container breach exists.
Skin Protection: Impermeable gloves (nitrile or neoprene), flame-resistant lab coat, long pants, rubber boots.
Respiratory Protection: NIOSH-approved cartridge respirator, or air-supplied systems where high dust or vapor risk is present.
Hygiene Measures: Wash hands before eating, after handling. Remove all traces of chemical before leaving work area.
Appearance: White to pale yellow waxy solid, mild ester or fruity odor
Molecular Formula: C25H50O4
Formula Weight: 414.66 g/mol
Melting Point: 36–42°C
Boiling Point: Decomposes before reaching boiling
Flash Point: Not determined—self-reactive
Solubility: Practically insoluble in water, miscible with organics (ethanol, hexane)
Vapor Pressure: Negligible at room temperature
Decomposition Temperature: Starts above 50°C, can be hazardous
Density: 0.85 g/cm³ at 20°C
Oxidizing Properties: Strong, capable of fueling combustion.
Chemical Stability: Stable in original, sealed container at recommended cold storage
Instability: Rapid breakdown triggered by heat, sunlight, impurities, friction, static, or shock.
Hazardous Polymerization: Not known to occur under normal industrial usage
Incompatible Materials: Avoid alkalis, metal catalysts, strong oxidizers, dry powders.
Decomposition Products: Releases carbon monoxide, carbon dioxide, hydrocarbons, possibly stearic acid, and volatile organic compounds during fire or overheating.
Conditions to Avoid: Above room temperature, open flames, strong light, vibration or impact.
Acute Toxicity: Significantly irritating to eyes and skin by animal studies; single exposure may trigger moderate toxicity with symptoms including nausea, headache, skin rash.
Chronic Toxicity: Repeated contact dries skin, may lead to eczema; prolonged inhalation—risk of bronchial irritation, rarely mild nervous system effects.
Sensitization: No evidence of allergic skin reaction; some cases suggest mild response.
Carcinogenicity: No data supporting human carcinogenicity; not listed by IARC, NTP, OSHA.
Mutagenicity: No lab data pointing to genetic hazard.
Specific Effects: Potential for corneal injury, upper respiratory stinging, stomach upset if swallowed by accident.
Target Organs: Skin, eyes, upper respiratory tract.
Ecotoxicity: Acute hazard to fish and invertebrates—expected to stunt aquatic life, possibly fatal at lower concentrations.
Persistence / Degradability: Expected to degrade through natural processes but not rapidly. Hydrolysis and photolysis break down main structures over long time frame.
Bioaccumulation: Moderate potential—fatty ester backbone can be absorbed by organisms, but breakdown limits larger bioconcentration.
Soil Mobility: Strong adsorption to sediment and organic matter on release.
Other Adverse Effects: No known disruption of ozone, but surface spills quickly impair water oxygen content.
Waste Disposal Methods: Place in chemical-waste drum for controlled incineration by licensed hazardous-waste contractor.
Container Disposal: Triple rinse and render package unusable before sending to landfill, or follow local hazardous waste return policy.
Reuse/Recycling: Do not reuse containers. All residues, including cleaning media and protective wear, must stay segregated from general waste.
Legislation: Handle disposal in compliance with environmental protection laws and waste management acts of jurisdiction.
UN Number: UN3106
Proper Shipping Name: Organic peroxide type E, solid
Transport Hazard Class: 5.2 (Organic Peroxides)
Packing Group: II (Medium danger)
Labels: Yellow and red hazard marking, explosive symbol
Shipping Instructions: Keep in original tubs, allow no shocks or stacking, log chain of custody.
Special Precautions for Transport: Never load with food, feed, or oxidizers. Restrict transit in high heat or during extreme weather.
Environmental Hazards: Mark as marine pollutant for sea shipment. Notify authorities on loss or breach in transit.
OSHA Status: Classified hazardous chemical under OSHA Hazard Communication Standard (29 CFR 1910.1200)
TSCA Status: Listed on Toxic Substances Control Act Inventory
EPA Regulation: Subject to reporting under SARA Title III, Section 313
EU Regulation (REACH): Candidate for registration; observe CLP guidelines for labelling and safe use
Labeling: GHS-compliant signal word, pictograms, and hazard statements displayed prominently
Restrictions: Employment of safe handling, worker training, incident reporting required by law in most countries
Other Standards: Refer to national Right-To-Know regulations, workplace environmental monitoring guidelines, and international shipping guidelines for organic peroxides.
