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)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H221 Flammable gas Flammable gases Category 2 Warning P210, P377, P381, P403 H280 Contains gas under pressure; may explode if heated Gases under pressure Compressed gas Liquefied gas Dissolved gas Warning P410+P403 H351 Suspected of causing cancer Carcinogenicity Category 2 Warning P201, P202, P281, P308+P313, P405,P501 H373 May cause damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 2 Warning P260, P314, P501 H420 Harms public health and the environment by destroying ozone in the upper atmosphere Hazardous to the ozone layer Category 1 Warning P502
Precautionary statements:	P202 Do not handle until all safety precautions have been read and understood. P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P308+P313 IF exposed or concerned: Get medical advice/attention. P410+P403 Protect from sunlight. Store in a well-ventilated place. P502 Refer to manufacturer/supplier for information on recovery/recycling