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Topic summary

Chloroprene

Chloroprene
Names Preferred IUPAC name
2-Chlorobuta-1,3-diene
Other names
  • Chloroprene
  • 2-chloro-1,3-butadiene
  • Chlorobutadiene
  • β-Chloroprene
Identifiers
3D model (JSmol)
741875 ChEBI
ChEMBL
ChemSpider
ECHA InfoCard100.004.381EC Number
  • 204-818-0
277888 KEGG
RTECS number
  • EL9625000
UNII
UN number1991
  • InChI=1S/C4H5Cl/c1-3-4(2)5/h3H,1-2H2
    Key: YACLQRRMGMJLJV-UHFFFAOYSA-N
  • InChI=1/C4H5Cl/c1-3-4(2)5/h3H,1-2H2
    Key: YACLQRRMGMJLJV-UHFFFAOYAQ
  • C=C(Cl)C=C
Properties C4H5ClMolar mass88.53 g·mol Appearance Colorless liquid OdorPungent, ether-like Density0.9598 g/cmMelting point−130 °C (−202 °F; 143 K) Boiling point59.4 °C (138.9 °F; 332.5 K) 0.026 g/100 mLSolubility in diethyl ethermiscible Solubility in acetonemiscible Solubility in benzenemiscible Solubility in ethanolsoluble Vapor pressure
  • 118 mmHg (10 °C (50 °F; 283 K))
  • 188 mmHg (20 °C (68 °F; 293 K))
  • 215 mmHg (25 °C (77 °F; 298 K))
1.4583 Hazards Occupational safety and health (OHS/OSH):
Main hazards
Highly flammable, irritant, toxic GHS labelling: DangerH225, H302, H315, H319, H332, H335, H350, H373P203, P210, P233, P240, P241, P242, P243, P260, P264, P264+P265, P270, P271, P280, P281, P301+P317, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P308+P313, P317, P318, P319, P321, P330, P332+P317, P337+P313, P362+P364, P370+P378, P403+P233, P403+P235, P405, P501NFPA 704 (fire diamond)
2
3
1
Flash point−4 °C (25 °F; 269 K) Explosive limits1.9%–20.0%10 ppm (skin) (TWA) Lethal dose or concentration (LD, LC): 450 mg/kg (rat, oral) 3207 ppm (rat, 4 hr)
  • 1052 ppm (rabbit, 8 hr)
  • 350 ppm (cat, 8 hr)
NIOSH (US health exposure limits):
PEL (Permissible)
25 ppm (90 mg/m, TWA, skin)
REL (Recommended)
1 ppm (3.6 mg/m, Ca C, [15-minute])
IDLH (Immediate danger)
300 ppm (1086 mg/m) Related compounds
Related Dienes
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Chloroprene (IUPAC name 2-chlorobuta-1,3-diene) is a chemical compound with the molecular formula CH2=CCl−CH=CH2. Chloroprene is a colorless volatile liquid, almost exclusively used as a monomer for the production of the polymer polychloroprene, better known as neoprene, a type of synthetic rubber.

Wikipedia source