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Product Name: 2,5-Dimethyl-2,5-Bis(Tert-Butylperoxy)Hexane
Chemical Formula: C16H34O4
CAS Number: 78-63-7
Physical Appearance: Pale yellow to colorless oily liquid, distinct odor
Synonyms: Commonly called DTBHPH, known for its use in polymerization and crosslinking applications.
Concentration: 90% to 100% active ingredient in commercial forms.
Health Hazards: Causes severe skin burns and eye damage, respiratory irritation, can be harmful if swallowed or inhaled, sensitizer on repeated exposure, risk of chronic effects like dermatitis on contact
Environmental Hazards: Toxic to aquatic life, potential for long-lasting contamination in water and soil, spills can cause oxygen depletion in bodies of water
Physical Hazards: Organic peroxide, strong oxidizer, may self-accelerate decomposition, can explode on heating or flaming, reacts with combustible materials.
Label Elements: Corrosive, oxidizing, exclamation mark for acute health hazard, aquatic hazard symbol for marked impact on environment.
Main Ingredient: 2,5-Dimethyl-2,5-Bis(Tert-Butylperoxy)Hexane, 90-100% by weight
Impurities: Tert-butyl alcohol, minor hydrocarbon byproducts, water content usually less than 3%
No solvents or significant diluents in higher concentration products, impurities can contribute to flammability and toxicity.
Inhalation: Move to fresh air immediately, seek medical help if breathing feels difficult or if coughing continues, remove contaminated clothing and loosen tight clothes
Skin Contact: Rinse with water for at least 15 minutes, use soap, remove affected clothing, watch for blistering, seek medical attention if irritation persists
Eye Contact: Flush with clean, gently flowing water for 15 minutes, remove contact lenses after first few minutes unless stuck, get medical attention immediately
Ingestion: Do not induce vomiting, give water to drink, get emergency medical care, look for symptoms like nausea, drowsiness, or convulsions.
Suitable Extinguishing Media: Water spray, foam, dry chemical, never try to smother flames with carbon dioxide due to reactivity with organic peroxides
Specific Hazards: May generate toxic fumes like carbon monoxide, carbon dioxide, and possibly explosive gaseous byproducts
Protective Equipment: Firefighters wear full gear, including self-contained breathing apparatus, keep upwind, and isolate danger zone
Firefighting Advice: Cool unopened containers with water to avoid rupture, remove all ignition sources, avoid breathing fumes.
Personal Precautions: Evacuate area, avoid skin and eye contact, wear protective gloves, goggles, chemical apron, and respirator in enclosed space
Environmental Precautions: Prevent runoff into drains and waterways, contain spill with earth or inert material
Clean-up Methods: Scoop up with non-sparking tools, absorb liquid with sand, vermiculite, avoid sawdust or organic materials, dispose in controlled conditions according to laws, vent contaminated area well.
Handling: Wear chemical-resistant gloves, goggles, and protective clothing, avoid friction, shock, or heat exposure, work in a well-ventilated area, ground all equipment during transfer, keep away from incompatible materials such as reducing agents or acids
Storage: Store in tightly closed original containers, away from combustible or reactive substances, keep in a cool, dry, and well-ventilated area, avoid direct sunlight, refrigerate if recommended, ensure fire-resistant construction and readily accessible spill-control kits nearby.
Engineering Controls: Local exhaust ventilation at workstations, flameproof electrical equipment, continuous air monitoring for peroxides in areas of regular use
Personal Protective Equipment: Splash-proof goggles, chemical-resistant gloves (like nitrile or neoprene), full-face shield for transfer operations, fire-retardant lab coat or apron, closed shoes
Respiratory Protection: Use NIOSH-certified organic vapor respirator if ventilation does not fully control exposure levels, especially when airborne concentrations exceed recommended limits
Hygiene Measures: Wash hands thoroughly after handling, change clothes that become contaminated, never eat, drink, or smoke around this material.
State: Liquid at room temperature
Color: Clear to pale yellow
Odor: Slight, sharp
Melting Point: Below -40°C
Boiling Point: Decomposes before boiling, over 150°C develops decomposition products
Flash Point: Around 75°C, but may self-ignite at higher concentration
Solubility: Insoluble in water, soluble in many organic solvents
Density: Typically near 0.89 g/cm³ at 20°C
Vapor Pressure: Low at ambient temperature, increases rapidly with heat.
Chemical Stability: Tends to decompose at elevated temperatures or if exposed to strong acids, bases, or metal ions, can self-accelerate
Conditions to Avoid: Heat, friction, impact, sparks, open flames, storage near incompatible chemicals
Incompatible Materials: Reducing agents, acids, accelerators, strong oxidizers, metals like copper or iron, combustible materials
Hazardous Decomposition Products: Releases carbon oxides, hydrocarbons, flammable gas and other harmful vapors during fire or decomposition events.
Routes of Exposure: Inhalation, skin absorption, eye or oral contact
Symptoms: Skin burns, eye irritation or injury, cough, sore throat, headache, dizziness, possible delayed lung effects, risk of sensitization on repeat contact
Chronic Exposure: Long-term occupational handling can lead to dermatitis, repeated inhalation in high doses could damage respiratory system, some peroxides in this family suspected of being mutagenic
Acute Toxicity: Moderately toxic by oral, dermal, or inhalation exposure according to animal studies, rapid intervention lowers long-term health risks.
Environmental Impact: Toxic to aquatic species even at low parts per million, slow natural degradation in water, risk of contamination in soils near industrial sites
Mobility: Tends to bind with organic materials, limited migration in soil or groundwater
Persistence and Degradability: Not readily biodegradable, can persist under poor waste management, partial breakdown yields persistent organic pollutants
Bioaccumulation: Potential for moderate bioaccumulation, recommends caution near food or feed storage areas.
Disposal Methods: Incinerate in a chemical incinerator equipped with afterburner and scrubber, avoid landfill, do not release to sewers
Legal Compliance: Follow strict hazardous waste disposal rules, label waste packaging clearly, work with authorized chemical disposal contractors
Waste Handling: Never mix with other wastes, especially organic or flammable materials, always stabilize waste before transport.
Proper Shipping Name: Organic Peroxide Type E, Liquid
Transport Hazard Class: 5.2 (Organic Peroxides)
Packing Group: II (substances presenting a medium level of danger)
Labeling Requirements: Display oxidizer and environment hazard symbols on all containers
Special Precautions: Protect against heat, impact, and friction during transit, keep segregated from food, feed, and incompatible substances.
Classification: Controlled as a dangerous good under various international transport regulations (IMDG, ADR, IATA), flagged hazardous by workplace chemical safety acts in North America, Europe, Asia
Restrictions: Prohibited from public sale, managed under strict occupational use protocols, subject to registration and licensing for handling and processing
Worker Protection: Mandated employee training on specific hazards and control measures, severe penalties for improper use or dumping, regular audits of storage and usage records by regulators.
