Melting point :−64(lit.)
Boiling point :41-43 °C
Density :2.28 g/mL at 25 °C(lit.)
vapor density :4.89 (vs air)
vapor pressure :24.09 psi ( 55 °C)
refractive index :n20/D 1.530
Flash point :−18 °F
storage temp. :2-8°C
solubility :water: soluble14g/L at 20°C
form :Liquid
Specific Gravity :2.280
color :Clear
PH :5.2 (H2O, 25℃)
Odor :Sweet, ethereal odor
Water Solubility :14 g/L (20 ºC)
Sensitive :Light Sensitive
Merck :14,6087
BRN :969135
Henry's Law Constant :5.06 at 21 °C (Gan and Yates, 1996)
Exposure limits :TLV-TWA 2 ppm (～11 mg/m³) (ACGIH), 5 ppm (MSHA and OSHA); carcinogenicity: Animal Limited Evidence (IARC), Suspected Human Carcinogen.
Dielectric constant :7.0（20℃）
Stability :Light Sensitive
LogP :1.510
CAS DataBase Reference :74-88-4(CAS DataBase Reference)
IARC :3 (Vol. 41, Sup 7, 71) 1999
NIST Chemistry Reference :Methyl iodide(74-88-4)
EPA Substance Registry System :Methyl iodide (74-88-4)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H226 Flammable liquid and vapour Flammable liquids Category 3 Warning H312 Harmful in contact with skin Acute toxicity,dermal Category 4 Warning P280,P302+P352, P312, P322, P363,P501 H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning H351 Suspected of causing cancer Carcinogenicity Category 2 Warning P201, P202, P281, P308+P313, P405,P501 H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.