Melting point :96-100°
Boiling point :263℃ at 101.3kPa
Density :1.6517 (rough estimate)
vapor pressure :0Pa at 25℃
refractive index :1.5300 (estimate)
storage temp. :Hygroscopic, -20°C Freezer, Under inert atmosphere
solubility :DMSO (Sparingly, Heated), Methanol (Slightly)
form :Solid
pka :-0.71±0.50(Predicted)
color :White to Off-White
PH :-0.96 at 23.9℃ and 1g/L
Water Solubility :2458g/L(25 ºC)
Stability :Hygroscopic
LogP :-1.49 at 25℃ and pH1
Dissociation constant :-0.17 at 25℃
EPA Substance Registry System :Methanedisulfonic acid (503-40-2)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
Precautionary statements:	P260 Do not breathe dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P310 Immediately call a POISON CENTER or doctor/physician. P321 Specific treatment (see … on this label). P363 Wash contaminated clothing before reuse. P405 Store locked up. P501 Dispose of contents/container to..…