Description

Chloroprene (CAS 126-99-8) is a highly reactive organic compound with the molecular formula C₄H₅Cl and the IUPAC name 2-chlorobuta-1,3-diene. This colorless, volatile liquid is a critical monomer in the production of synthetic rubber, particularly polychloroprene (neoprene), known for its excellent resistance to oils, heat, weathering, and chemical degradation. Chloroprene is synthesized via the chlorination of butadiene or the catalytic dehydrogenation of 1,2-dichlorobutene. It is stored and handled under strict conditions due to its flammability and potential health hazards, including respiratory and skin irritation. Ideal for industrial and research applications, our high-purity Chloroprene meets stringent quality standards, ensuring optimal performance in polymerization and material science research.

Properties

• CAS Number: 126-99-8
• Complexity: 54.7
• IUPAC Name: 2-chlorobuta-1,3-diene
• InChI: InChI=1S/C4H5Cl/c1-3-4(2)5/h3H,1-2H2
• InChI Key: YACLQRRMGMJLJV-UHFFFAOYSA-N
• LogP: 2.2
• Exact Mass: 88.0079779
• Molecular Formula: C4H5Cl
• Molecular Weight: 88.53
• SMILES: C=CC(=C)Cl
• Monoisotopic Mass: 88.0079779
• Physical Description: Chloroprene, stabilized appears as a clear colorless liquid. Flash point is very low. May polymerize exothermically if heated or contaminated. If polymerization takes place inside a container, the container may rupture violently. Less dense than water. Vapors heavier than air. Used to make neoprene rubber.
• Color/Form: Colorless liquid
• Odor: Pungent, ether-like odor
• Boiling Point: 138.9 °F at 760 mmHg
• Melting Point: -202 °F
• Flash Point: -4 °F
• Solubility: Slightly soluble
• Density: 0.9583 at 68 °F – Less dense than water; will float
• Vapor Density: 3 – Heavier than air; will sink
• Vapor Pressure: 118 mmHg at 50 °F ; 188 mmHg at 68 °F
• Stability/Shelf Life: POLYMERIZES ON STANDING
• Autoignition Temperature: 440 °C
• Ionization Potential: 8.79 eV
• Odor Threshold: Odor Threshold Low: 0.11 [ppm]
• Refractive Index: Index of refraction: 1.4583 @ 20 °C/D
• Synonyms: CHLOROPRENE, 2-Chloro-1,3-butadiene, 2-Chlorobuta-1,3-diene, 126-99-8, 1,3-Butadiene, 2-chloro-, Neoprene, .beta.-Chloroprene, beta-Chloroprene, 2-Chloroprene, CCRIS 873, NSC 18589, HSDB 1618, EINECS 204-818-0, UNII-42L93DWV3A, UN1991, CHEBI:39481, .beta.-Chlorobutadiene, 2-Chlorobutadiene 1,3, NSC-18589, CHLOROPRENE [HSDB], CHLOROPRENE [IARC], DTXSID5020316, EC 204-818-0, NSC18589, CHLORO-1,3-BUTADIENE, 2-, UN 1991, CHLOROPRENE (IARC), CHLOROPRENE, (STABILIZED), CHLOROPRENE, [STABILIZED], beta-Chlorobutadiene, Polychloroprenes, Chloroprene Polymers, 2Chloro1,3butadiene, 2-chlorobutadiene-1,3, CHLOROPRENE, STABILIZED, DTXCID30316, beta-Chloroprene (ACGIH:OSHA), 2-Chloro-1,3-butadiene (OSHA), beta-CHLOROPRENE (2-CHLORO-1,3-BUTADIENE), yaclqrrmgmjljv-uhfffaoysa-n, Chlorobutadiene, 2-Chlorobutadiene, Chloropreen, Cloroprene, 2-Chlor-1,3-butadien, Chloropren, 2-Cloro-1,3-butadiene, 2-Chloor-1,3-butadieen, 42L93DWV3A, Chloroprene (>96% chloroprene), Chloroprene (99.6% chloroprene), Chloropreen [Dutch], Cloroprene [Italian], Chloropren [German, Polish], 2-Chlor-1,3-butadien [German], 2-Chloor-1,3-butadieen [Dutch], 2-Cloro-1,3-butadiene [Italian], Chloroprene, uninhibited [Forbidden], Chloroprene, inhibited, beta-Chloroprene 2-Chloro-1,3-butadiene, Chloroprene, uninhibited, SCHEMBL20161, WLN: 1UYG1U1, Chloropren(GERMAN, POLISH), CHEMBL555660, SCHEMBL1790892, SCHEMBL5491779, SCHEMBL6743397, BCP31738, AKOS028108417, Chloroprene 5000 microg/mL in Methanol, MSK000181-1000M, NS00008234, Chloroprene Solution in Methanol, 1000ug/mL, C19208, C19502, Q410871, Chloroprene, inhibited [UN1991] [Flammable liquid, Poison], 2-Chlorobuta-1,3-diene;2-Chloro-1,3-butadiene;1,3-Butadiene, 2-chloro-

Application

Chloroprene is primarily used as a monomer in the production of polychloroprene rubber (neoprene), which is valued for its durability and resistance to harsh environments. It is widely applied in automotive components, industrial hoses, adhesives, and protective gear due to its thermal and chemical stability. Researchers also utilize Chloroprene in studies of polymerization kinetics and elastomer development.

Safety and Hazards

GHS Hazard Statements

• H225: Highly Flammable liquid and vapor [Danger Flammable liquids]
• H301: Toxic if swallowed [Danger Acute toxicity, oral]
• H311: Toxic in contact with skin [Danger Acute toxicity, dermal]
• H315: Causes skin irritation [Warning Skin corrosion/irritation]
• H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]
• H331: Toxic if inhaled [Danger Acute toxicity, inhalation]
• H340: May cause genetic defects [Danger Germ cell mutagenicity]
• H350: May cause cancer [Danger Carcinogenicity]
• H360: May damage fertility or the unborn child [Danger Reproductive toxicity]
• H370: Causes damage to organs [Danger Specific target organ toxicity, single exposure]
• H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
• H373: May causes damage to organs through prolonged or repeated exposure [Warning Specific target organ toxicity, repeated exposure]

Precautionary Statements

• P203, P210, P233, P240, P241, P242, P243, P260, P261, P262, P264, P264+P265, P270, P271, P280, P301+P316, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P308+P316, P316, P318, P319, P321, P330, P332+P317, P337+P317, P361+P364, P362+P364, P370+P378, P403+P233, P403+P235, P405, and P501

Hazard Classes and Categories

• Flam. Liq. 2 (100%)
• Acute Tox. 3 (72.1%)
• Acute Tox. 4 (27.9%)
• Skin Irrit. 2 (100%)
• Eye Irrit. 2 (100%)
• Acute Tox. 4 (100%)
• STOT SE 3 (100%)
• Carc. 1B (100%)
• STOT SE 2 (18.1%)
• STOT RE 2 (100%)
• Aquatic Chronic 2 (89.8%)

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Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.