MSDS for Bis(2,4-Dichlorobenzoyl) Peroxide TBEC

Identification

Product Name: Bis(2,4-Dichlorobenzoyl) Peroxide TBEC
Chemical Family: Organic Peroxide
Synonyms: 2,4-Dichlorobenzoyl Peroxide DCBP
CAS Number: 133-14-2
Manufacturer: Major chemical suppliers, consult specific source for updated contact information
Use: Polymerization initiator, crosslinking agent in plastics, chemical intermediate in manufacturing processes
Emergency Phone: Regional poison center, hazardous material response team number
Recommended Use: Industrial polymer and resin production, not intended for household or consumer applications

Hazard Identification

Hazard Classification: Oxidizing solid (Category 1), Acute toxicity (oral, Category 4), Skin irritation (Category 2), Eye irritation (Category 2A), Specific target organ toxicity – single exposure (Category 3, respiratory tract irritation)
Signal Word: Danger
Hazard Statements: May cause fire or explosion; strong oxidizer, Harmful if swallowed, Causes skin and eye irritation, May cause respiratory irritation
Pictograms: Flame over circle, Exclamation mark
Precautionary Statements: Keep away from heat, sparks, open flames; Avoid breathing dust or vapors; Use only outdoors or in well-ventilated area; Wear protective gloves, clothing, and eye protection
Routes of Exposure: Inhalation, ingestion, skin contact, eye contact
Target Organs: Skin, eyes, respiratory system
Environmental Hazards: Toxic to aquatic life with long lasting effects

Composition / Information on Ingredients

Chemical Name: Bis(2,4-Dichlorobenzoyl) Peroxide
CAS Number: 133-14-2
Concentration: Over 95% by weight
Other Components: Trace stabilizers, non-hazardous process residues (less than 5%)
Impurities: Minor amounts of related peroxides or unreacted materials
Additives: None intentionally added, may contain phlegmatizer such as dimethyl phthalate at <2% in commercial grades

First Aid Measures

Inhalation: Move affected person to fresh air, keep at rest and warm, administer oxygen if breathing is difficult, seek medical attention if symptoms develop
Skin Contact: Remove contaminated clothing and shoes immediately, wash skin thoroughly with soap and water, consult a physician for persistent irritation
Eye Contact: Flush eyes with plenty of water for at least 15 minutes, lift eyelids occasionally, remove contact lenses carefully, seek prompt ophthalmic care
Ingestion: Do not induce vomiting, rinse mouth if conscious, never give anything by mouth to an unconscious person, seek immediate medical attention
Symptoms and Effects: Burning, irritation, itching, redness, shortness of breath; inhalation can cause coughing and chest discomfort
Advice for Doctors: Treat symptomatically, monitor for delayed pulmonary edema or increased sensitivity of exposed skin

Fire-Fighting Measures

Suitable Extinguishing Media: Powder, foam, carbon dioxide, dry chemical agents; avoid water jet
Special Hazards: Decomposes under heat or fire to release toxic, corrosive vapors like hydrogen chloride, phosgene, and other chlorinated organics; strong oxidizer, accelerates burning of combustibles
Protective Equipment: Full protective clothing, self-contained breathing apparatus (SCBA), chemical-resistant gloves
Procedures: Cool containers with flooding quantities of water even after fire is out to prevent re-ignition and pressure buildup
Unusual Fire Hazards: Vigorous and violent burning especially when in contact with organic materials, risk of explosion if not properly contained
Decomposition Products: Carbon dioxide, carbon monoxide, hydrogen chloride, phosgene, dichlorobenzene, benzoyl chloride
Firefighting Precautions: Approach from upwind, avoid inhalation of smoke or vapors, evacuate area at risk

Accidental Release Measures

Personal Precautions: Evacuate unnecessary personnel; ensure use of appropriate PPE (impervious gloves, safety goggles, antistatic footwear, respirator for dust); avoid breathing dust
Environmental Precautions: Prevent entry into drains, soil, or bodies of water; notify authorities if product enters sanitation/drainage systems
Spill Containment: Eliminate all ignition sources; stop leak if safe to do so; prevent spread using inert, noncombustible absorbent such as vermiculite or sand
Cleanup Methods: Sweep or scoop into clean, dry, plastic containers for disposal; do not use metal tools to avoid sparks
Decontamination: Ventilate spill area; wash spill area with soda ash and water; bag contaminated cleaning materials in suitable containers for disposal
Disposal Reference: Refer to local, regional, national waste handling requirements

Handling and Storage

Safe Handling: Keep away from heat, sparks, open flames, hot surfaces; avoid friction, grinding, impact; do not handle in bulk near incompatible substances like reducing agents, acids, or bases
Use Practices: Handle in small batches or portions; open only in well-ventilated areas; avoid direct physical contact; use non-sparking tools
Hygiene Measures: Wash hands and face thoroughly after handling; remove contaminated clothing before entering eating or rest areas; do not eat, drink, or smoke during use
Storage Requirements: Store in tightly closed original container, away from sunlight, below 30°C, in dry, well-ventilated, dedicated chemical storage room
Segregation: Isolate from incompatible substances such as organic materials, combustibles, heavy metals, acids, alkalis, and strong reducing agents
Container Materials: Use only approved polyethylene, polypropylene, or glass containers; avoid metal
Storage Stability: Monitor for signs of decomposition (bulging, odor, heat); comply with shelf-life guidance, typically 6–12 months under specified conditions

Exposure Controls and Personal Protection

Occupational Exposure Limit: No ACGIH TLV or OSHA PEL assigned; minimize exposure as much as possible
Engineering Controls: Local exhaust ventilation; use explosion-proof electrical systems; chemical fume hood in laboratory environments
Respiratory Protection: Particulate respirator (N95 or better) or full-face supplied-air respirator for large spills
Hand Protection: Butyl rubber, nitrile, or other chemical-resistant gloves
Eye/Face Protection: Safety goggles, face shield when splash hazard exists
Skin/Body Protection: Antistatic lab coat, flame-resistant clothing, suitable footwear
Hygiene Practices: Change contaminated clothing promptly; wash hands thoroughly; do not mix with food, beverages, or smoking materials
Monitoring Methods: Use chemical sensors or gas detectors in workspaces for early detection of peroxide decomposition products

Physical and Chemical Properties

Appearance: White to off-white crystalline solid or powder
Odor: Faint, sweet aromatic odor
Odor Threshold: Not established
pH: Not applicable (solid)
Melting Point/Freezing Point: 104–109°C (decomposes before boiling)
Initial Boiling Point and Range: Not measurable, decomposes before boiling
Flash Point: Not applicable (solid organic peroxide)
Evaporation Rate: Not established
Flammability: Oxidizing solid, causes combustion in contact with organic material
Explosive Properties: May explode under confinement or fire
Vapor Pressure: Negligible at room temperature
Vapor Density: Not applicable
Partition Coefficient (n-octanol/water): Estimated log Pow 4.5–5.5
Solubility: Practically insoluble in water; soluble in most aromatic and chlorinated hydrocarbons
Decomposition Temperature: 105°C (rapid exothermic breakdown with gas evolution)
Auto-ignition Temperature: Over 140°C
Bulk Density: 0.5–0.7 g/cm³ (depending on granule size and manufacturing)

Stability and Reactivity

Reactivity: Readily oxidizes organic materials, acts as a powerful oxidizing agent
Chemical Stability: Thermally unstable, decomposes exothermically above 40°C or under mechanical shock
Incompatible Materials: Strong acids, alkalis, reducing agents, heavy metal salts, amines, flammable substances, combustibles, organic solvents
Hazardous Decomposition: Carbon monoxide, carbon dioxide, hydrogen chloride, phosgene, aromatic chlorinated compounds
Hazardous Polymerization: Will not self-polymerize, but self-accelerating decomposition possible
Conditions to Avoid: Heat, flames, sparks, impact, friction, contamination from dust or metallic surfaces
Other Notes: Decomposition can be rapid and violent, potential for spontaneous combustion under improper storage

Toxicological Information

Acute Toxicity (Oral): LD50 (rat) 300–2000 mg/kg
Acute Toxicity (Dermal): LD50 (rat/rabbit) >2000 mg/kg
Acute Toxicity (Inhalation): LC50 (rat) not precisely determined, may irritate respiratory tract
Skin Corrosion/Irritation: Causes moderate to severe irritation on contact, potential for chemical burns
Eye Damage/Irritation: Severe irritation, pain, watering, possible corneal damage
Respiratory Sensitization: Persistent cough, throat irritation, pulmonary edema in severe cases
Chronic Effects: Repeated exposure can lead to dermatitis, asthmatic symptoms in sensitive individuals
Carcinogenicity: Not classified by IARC, NTP, or OSHA as carcinogenic
Mutagenicity: No reliable evidence in standard in vitro or animal experiments
Teratogenicity: No conclusive animal or epidemiological data
Other Information: Prolonged exposure to peroxides has occasionally led to systemic toxicity in poorly ventilated settings

Ecological Information

Ecotoxicity: Harmful to aquatic invertebrates, acute and chronic effect on Daphnia magna and fish (LC50/EC50: 1–10 mg/L)
Persistence and Degradability: Moderate persistence in environment, slowly degrades via hydrolysis and photolysis; break-down forms persistent chlorinated aromatics
Bioaccumulation Potential: High potential due to high log Pow; may accumulate in aquatic organisms
Mobility in Soil: Low water solubility means low mobility, but runoff may occur after spillage
Other Adverse Effects: Break-down products may be more persistent and toxic than parent compound; avoid contamination of surface waters and soils

Disposal Considerations

Waste Generation: Avoid generating dust; segregate from combustible and incompatible materials
Disposal Methods: Incinerate in an approved facility with afterburner and scrubber; do not landfill unless facility is licensed for hazardous peroxides
Container Disposal: Triple rinse, puncture, send to licensed chemical disposal facility
Contaminated Packaging: Handle as hazardous waste; do not reuse containers
Regional Regulations: Follow national, state, and local regulations regarding peroxide and hazardous chemical disposal
Special Instructions: Avoid release to environment during disposal operations; contractors should be trained in peroxide handling

Transport Information

UN Number: UN 3108
Proper Shipping Name: Organic peroxide type E, solid (Bis(2,4-Dichlorobenzoyl) Peroxide TBEC)
Hazard Class: 5.2 (Organic Peroxides)
Packing Group: II
Labels Required: Oxidizer, Organic Peroxide
Transport Hazard: Avoid rough handling, keep container upright and cool; check vehicle for compatibility
Marine Pollutant: Yes
Special Precautions: Emergency response guidebook code 145; segregate from foodstuffs and animal feed during transport
Environmental Hazards: Product and solution hazardous to aquatic life, avoid cargo spillage
Regulatory References: Compliance with IMDG, IATA, ADR requirements

Regulatory Information

Classification: Listed as hazardous under OSHA Hazard Communication Standard (29 CFR 1910.1200)
SARA Title III Sections 311/312: Immediate Health Hazard, Delayed Health Hazard, Fire Hazard, Reactivity Hazard
SARA Title III Section 313: Not subject to reporting, unless mixed with listed hazardous substances
TSCA Inventory: Included
REACH: Registered, subject to REACH restrictions and authorization for supply in EU
Canadian WHMIS: Class C (oxidizing materials), D2B (toxic materials causing other effects)
EU Classification: O Oxidizing, Xn Harmful, N Dangerous for the Environment
Notification: Producers and users must maintain accurate inventory and annual reporting for large scale use
Additional Notes: Subject to restrictions for consumer supply; must observe workplace chemical safety programs and local control measures