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Chloromethane Structure

Chloromethane

Chemical Properties

Melting point −97 °C(lit.)
Boiling point −24.2 °C(lit.)
Density  0.915 g/mL at 25 °C(lit.)
vapor density  1.74 (vs air)
vapor pressure  3796 mm Hg ( 20 °C)
refractive index  1.0007
Flash point <-30 °F
storage temp.  2-8°C
solubility  water: soluble5.32g/L at 25°C
form  Colorless gas
color  Colorless to Almost colorless
Odor faint sweet ethereal odor
explosive limit 19%
Water Solubility  5.347g/L(24.9 ºC)
Merck  14,6041
BRN  1696839
Henry's Law Constant In seawater: 5.22 at 5 °C, 6.36 at 10 °C, 8.72 at 15 °C, 9.35 at 20 °C, 11.20 at 25 °C (Moore, 2000)
Exposure limits TLV-TWA 50 ppm (~105 mg/m3) (ACGIH), 100 ppm (~210 mg/m3) (OSHA); ceiling 100 ppm (MSHA), 200 ppm (OSHA); TLV STEL 100 ppm (ACGIH); carcinogenicity: Animal Inadequate Evidence, Human Inad equate Evidence (IARC).
Dielectric constant 12.6(-20℃)
Stability Stable. May react violently or explosively with interhalogens, magnesium, zinc, potassium, sodium or their alloys. Incompatible with natural rubber and neoprene composites, but does not attack PVA. Highly flammable. May decompose upon exposure to moist air or water.
CAS DataBase Reference 74-87-3(CAS DataBase Reference)
IARC 3 (Vol. 41, Sup 7, 71) 1999
EPA Substance Registry System Chloromethane (74-87-3)

Safety Information

Hazard Codes  F+,Xn,T,F
Risk Statements  12-40-48/20-67-66-22-19-38-23/25-11-39/23/24/25-23/24/25-62-63
Safety Statements  9-16-33-29-36-24-45-7-36/37
RIDADR  UN 1993 3/PG 1
WGK Germany  2
RTECS  PA6300000
Autoignition Temperature 1169 °F
HS Code  2903.11.0010
DOT Classification 2.1 (Flammable gas)
HazardClass  2.1
PackingGroup  II
Hazardous Substances Data 74-87-3(Hazardous Substances Data)
Toxicity LC50 (inhalation) for mice 3,146 ppm/7-h, rats 152,000 mg/m3/30-min (quoted, RTECS, 1985).
IDLA 2,000 ppm

MSDS

Usage And Synthesis

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