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Chemical: 1,3-Dichloro-2-Butene
Synonym: 1,3-DCB
Formula: C4H6Cl2
Appearance: Clear to slightly yellowish liquid, noticeable odor
Uses: Intermediate for pharmaceuticals, organic chemicals, specialty applications where reactivity with double bonds matters
Molecular Weight: 125.0 g/mol
CAS Number: 1476-11-5
Classification: Flammable Liquid, Health Hazard, Environmental Hazard
Physical Hazards: Vapor/air mixtures may ignite at room temperature
Health Hazards: Toxic if inhaled or ingested, skin and eye irritant, may cause lung irritation after exposure, possible carcinogen
Environmental Hazards: Harmful to aquatic life, risk to soil and groundwater due to persistence and mobility
Component: 1,3-Dichloro-2-Butene
Concentration: 98% or greater
Impurities: Relatively low; monochloro and trichloro derivatives may be present in trace amounts
Inhalation: Move to fresh air, avoid breathing vapors
Skin Contact: Wash affected area with soap and water, remove contaminated clothing
Eye Contact: Rinse with plenty of water, seek medical advice if irritation persists
Ingestion: Avoid inducing vomiting, rinse mouth with water, seek prompt medical attention
Suitable Extinguishing Media: Carbon dioxide, dry chemical powder, foam
Special Hazards: Releases toxic, corrosive gases such as hydrogen chloride on burning
Protective Equipment: Full protective gear, self-contained breathing apparatus
Advice for Firefighters: Cool containers with water spray, avoid inhaling vapors or smoke
Personal Precautions: Use personal protective equipment, ventilate area, avoid breathing fumes
Environmental Precautions: Prevent entry into sewers, soil, or waterways
Clean-Up: Absorb spill with inert material such as sand, place in chemical waste drum, decontaminate area with water and detergent
Safe Handling: Use in well-ventilated places, avoid skin and eye contact, keep away from sparks and open flames
Proper Storage: Keep in tightly closed containers, store in a cool, dry, well-ventilated area away from incompatible chemicals like oxidizers or acids
Engineering Controls: Use fume hoods or local exhaust ventilation
Personal Protective Equipment: Chemical-resistant gloves, goggles or safety glasses, lab coat or protective clothing, approved respirator when exposure limits are at risk of being exceeded
Hygiene Measures: Wash hands after handling, do not eat, drink, or smoke in work areas
State: Liquid
Color: Clear to yellowish
Odor: Sharp, chloroalkene-like
Boiling Point: Near 130°C
Melting Point: Below freezing, exact point can vary
Vapor Pressure: Moderate at room temperature
Solubility: Slightly soluble in water, readily soluble in most organic solvents
Density: Heavier than water
Flash Point: Ranges around 40°C
Autoignition: Not low but still possible in lab fires
Explosive Properties: Vapors can form explosive mixtures with air
Chemical Stability: Stable under recommended storage conditions but breaks down with strong acids or bases
Reactivity: Reacts with oxidizers, strong bases, may produce toxic gases on heating or combustion
Incompatible Materials: Strong acids, bases, oxidizing agents, alkali metals
Acute Toxicity: Harmful if inhaled, ingested, or absorbed through skin. Laboratory animals exposed to dichlorobutenes showed irritation to lung tissue, central nervous system effects at high concentration
Chronic Exposure: Can cause skin dermatitis or respiratory tract issues
Symptoms of Overexposure: Headache, nausea, irritation, drowsiness, coughing
Carcinogenicity: Some sources point toward possible cancer risk, though evidence remains based on animal studies, not large human trials
Additional Info: High vapor concentrations may cause dizziness, lack of coordination
Aquatic Toxicity: Endangers aquatic organisms due to moderate persistence
Mobility: Moves through soil, potential to contaminate groundwater
Persistence: Biodegradable to a degree, but breakdown products stay in environment for some time
Bioaccumulation: Little is known about buildup in the food chain, but solubility presents some risk to fish and invertebrates
Methods: Burn in a chemical incinerator, compliant with local and national disposal rules
Avoid: Direct flushing into drains, uncontrolled releases
Precautions: Empty containers retain product residue; handle with same caution as full ones to avoid fires, environmental damage
UN Number: Classified under hazardous goods for shipping
Label Required: Flammable liquid, toxic
Packing Group: Moderate risk
Precautions for Shipment: Protect from physical damage, keep containers upright and secured, avoid high heat and sparks during transit
TSCA: Listed in US for industrial use
REACH Status (Europe): Generally recognized as hazardous and subject to precautionary labelling
Workplace Control: Exposure limited by occupational health standards, PPE required by law in many countries
Hazard Symbols: Complies with GHS labelling for flammable, poisonous, environmental danger
