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Chloroprene

CAS Number
126-99-8
EC Number
204-818-0
Chemical Formula
C4H5Cl
Molecular Weight
88.53 g/mol

Description

Chloroprene (CAS 126-99-8 ), also known as 2-chlorobutadiene, is the primary monomer used in the production of polychloroprene, one of the most commercially significant synthetic elastomers. It undergoes controlled polymerization to yield a rubber with strong resistance to oils, weathering, and flame. These properties determine its suitability across demanding industrial applications. The dominant use of this monomer is in the manufacture of neoprene rubber, where it is polymerized to produce sheets, adhesives, foams, and molded goods for global markets. In the automotive and construction sectors, polychloroprene is processed into belts, hoses, seals, and gaskets. These components must perform under mechanical stress and chemical exposure. Adhesive formulators rely on polychloroprene-based contact adhesives for bonding dissimilar substrates. This is common in footwear, furniture, and panel assembly industries. Specialty wire and cable jacketing also depends on polychloroprene for its flame-retardant characteristics. This is essential for safety in demanding electrical installations. The product is supplied as a stabilized liquid monomer, typically in bulk or isotank quantities. It is handled under inhibited conditions to prevent premature polymerization during transit. Technical-grade specifications are standard for industrial supply. Purity levels and inhibitor content are defined per buyer or process requirements to ensure consistent performance. Contact us for supply of Chloroprene Request Quote

Other Names (Synonyms)

beta-Chloroprene | 2-chlorobutadiene | 2-chloro-1,3-butadiene | 2-Chlor-1,3-butadien | 2-chlorobuta-1,3-diene | 1,3-Butadiene, 2-chloro-

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point-130 °C
Boiling Point59.4 °C
Density0.956 g/cm³ @ Temp: 20 °C
Flash Point11 °C
AppearanceChloroprene is a colorless, flammable liquid possessing a pungent odor. The Odor Threshold is 0.4 milligram per cubic meter
FormColorless liquid
Water Solubility256mg/L at 20℃
Vapor Pressure118 at 10 °C, 200 at 20 °C, 275 at 30 °C (quoted, Verschueren, 1983)
Refractive Index1.4583
Log P2.525 at 20℃

Safety & Handling

Danger
GHS02· FlammableGHS07· IrritantGHS08· Health HazardGHS06· ToxicGHS09· Environment

Hazard Statements

H225Highly Flammable liquid and vapor
H301Toxic if swallowed
H302Harmful if swallowed
H310Fatal in contact with skin
H311Toxic in contact with skin
H315Causes skin irritation
H319Causes serious eye irritation
H331Toxic if inhaled
H332Harmful if inhaled
H335May cause respiratory irritation
H340May cause genetic defects
H350May cause cancer
H351Suspected of causing cancer
H360May damage fertility or the unborn child
H361Suspected of damaging fertility or the unborn child
H370Causes damage to organs
H371May cause damage to organs
H372Causes damage to organs through prolonged or repeated exposure
H373May causes damage to organs through prolonged or repeated exposure
H411Toxic to aquatic life with long lasting effects H302+
H332Harmful if swallowed or if inhaled

Precautionary Statements

P203Obtain, consult and follow expert instructions for use.
P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233Keep container tightly closed.
P240Ground and bond container and receiving equipment.
P241Use explosion-proof equipment.
P242Use non-sparking tools.
P243Take action to prevent static discharges.
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P262Do not get in eyes, on skin, or on clothing.
P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P271Use only outdoors or in a well-ventilated area.
P273Avoid release to the environment.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P316Get emergency medical help immediately.
P317Get emergency medical help.
P318IF exposed or concerned, get medical advice.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P330Rinse mouth.
P391Collect spillage.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P316Get emergency medical help immediately.
P317Get emergency medical help.
P352IF ON SKIN: Wash with plenty of water.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P316Get emergency medical help immediately.
P317Get emergency medical help.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P364Take off immediately all contaminated clothing and wash it before reuse.
P364Take off contaminated clothing and wash it before reuse.
P378Use … for extinction.
P233Store in a well-ventilated place. Keep container tightly closed.
P235Store in a well-ventilated place. Keep cool.
P353IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

Storage Class3 - Flammable liquids
WGK (Germany)3