Chloroprene

Chloroprene
Chloroprene
Chloroprene
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 InfoCard 100.004.381 Edit this at Wikidata
EC Number
  • 204-818-0
277888
KEGG
RTECS number
  • EL9625000
UNII
UN number 1991
  • InChI=1S/C4H5Cl/c1-3-4(2)5/h3H,1-2H2 checkY
    Key: YACLQRRMGMJLJV-UHFFFAOYSA-N checkY
  • InChI=1/C4H5Cl/c1-3-4(2)5/h3H,1-2H2
    Key: YACLQRRMGMJLJV-UHFFFAOYAQ
  • C=C(Cl)C=C
Properties
C4H5Cl
Molar mass 88.5365 g/mol
Appearance Colorless liquid
Odor Pungent, ether-like
Density 0.9598 g/cm3
Melting point −130 °C (−202 °F; 143 K)
Boiling point 59.4 °C (138.9 °F; 332.5 K)
0.026 g/100 mL
Solubility Soluble in alcohol, diethyl ether
Miscible in ethyl ether, acetone, benzene
Vapor pressure 188 mmHg (20 °C)[1]
1.4583
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Highly flammable, irritant, toxic
GHS labelling:
GHS02: FlammableGHS07: Exclamation markGHS08: Health hazard
Danger
H225, H302, H315, H319, H332, H335, H350, H373
P201, P202, P210, P233, P240, P241, P242, P243, P260, P261, P264, P270, P271, P280, P281, P301+P312, P302+P352, P303+P361+P353, P304+P312, P304+P340, P305+P351+P338, P308+P313, P312, P314, P321, P330, P332+P313, P337+P313, P362, P370+P378, P403+P233, P403+P235, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 3: Liquids and solids that can be ignited under almost all ambient temperature conditions. Flash point between 23 and 38 °C (73 and 100 °F). E.g. gasolineInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
2
3
0
Flash point −15.6 °C (3.9 °F; 257.5 K)
Explosive limits 1.9–11.3%[1]
Lethal dose or concentration (LD, LC):
450 mg/kg (rat, oral)
3207 ppm (rat, 4 hr)[2]
1052 ppm (rabbit, 8 hr)
350 ppm (cat, 8 hr)[2]
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 25 ppm (90 mg/m3) [skin][1]
REL (Recommended)
 Ca C 1 ppm (3.6 mg/m3) [15-minute][1]
IDLH (Immediate danger)
 300 ppm[1]
Related compounds
Related Dienes
 Butadiene
Isoprene
Related compounds
 Vinyl chloride
2,3-Dichlorobutadiene
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Chloroprene (IUPAC name 2-chlorobuta-1,3-diene) is a chemical compound with the molecular formula CH2=CCl−CH=CH2.[3] 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.

  1. ^ a b c d e NIOSH Pocket Guide to Chemical Hazards. "#0133". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ a b "ß-Chloroprene". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  3. ^ Cite error: The named reference Ross was invoked but never defined (see the help page).