Melting point :20°C
Boiling point :202-203 °C(lit.)
Density :1.3 g/mL at 25 °C(lit.)
vapor pressure :0.8 hPa (59 °C)
refractive index :n20/D 1.414(lit.)
Flash point :220 °F
storage temp. :Store below +30°C.
solubility :200g/l
form :Liquid
color :Colorless to pale yellow
Water Solubility :200 g/L (20 ºC)
Merck :14,6097
BRN :1098586
Stability :Stable. Combustible. Incompatible with strong oxidizing agents, strong acids, strong bases.
InChIKey :MBABOKRGFJTBAE-UHFFFAOYSA-N
CAS DataBase Reference :66-27-3(CAS DataBase Reference)
IARC :2A (Vol. 7, Sup 7, 71) 1999
NIST Chemistry Reference :Methanesulfonic acid, methyl ester(66-27-3)
EPA Substance Registry System :Methyl methanesulfonate (66-27-3)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, 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 H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled Sensitisation, respiratory Category 1 Danger P261, P285, P304+P341, P342+P311,P501 H340 May cause genetic defects Germ cell mutagenicity Category 1A, 1B Danger 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 H411 Toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 2
Precautionary statements:	P201 Obtain special instructions before use. P273 Avoid release to the environment. P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P302+P352 IF ON SKIN: wash with plenty of soap and water. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.