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Methanesulfonic acid Structure

Methanesulfonic acid

Product NameMethanesulfonic acid

CAS75-75-2

CBNumberCB3433704

MFCH4O3S

MW96.11

EINECS200-898-6

MDL NumberMFCD00007518

MOL File75-75-2.mol

MSDS FileSDS

Chemical Properties

Melting point 17-19 °C (lit.)
Boiling point 167 °C/10 mmHg (lit.)
Density  1.475-1.485 g/mL at 20 °C 1.481 g/mL at 25 °C (lit.)
vapor density  3.3 (vs air)
vapor pressure  1 mm Hg ( 20 °C)
refractive index  n20/D 1.429(lit.)
Flash point >230 °F
storage temp.  2-8°C
solubility  water: soluble1,000 g/L at 20°C
pka -2.6(at 25℃)
form  Solution
Specific Gravity 1.48 (18/4℃)
color  brown
Water Solubility  Miscible with water. Slightly miscible with benzene and toluene. Immiscible with paraffins.
λmax λ: 240-320 nm Amax: <0.4
Sensitive  Light Sensitive & Hygroscopic
Merck  14,5954
BRN  1446024
Stability Stable. Moisture sensitive. Incompatible with amines, bases, water, common metals. Releases a substantial amount of heat when diluted with water (add acid to water with care if diluting).
InChIKey AFVFQIVMOAPDHO-UHFFFAOYSA-N
CAS DataBase Reference 75-75-2(CAS DataBase Reference)
NIST Chemistry Reference CH3SO3H(75-75-2)
EPA Substance Registry System Methanesulfonic acid (75-75-2)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H290-H302-H314-H335
Precautionary statements P234-P261-P280-P301+P312-P303+P361+P353-P305+P351+P338
Hazard Codes  C
Risk Statements  34-22-21/22-35
Safety Statements  26-36-45-1/2-36/37/39
RIDADR  UN 3265 8/PG 2
WGK Germany  1
RTECS  PB1140000
TSCA  Yes
HazardClass  8
PackingGroup  III
HS Code  29041000
Hazardous Substances Data 75-75-2(Hazardous Substances Data)
Toxicity LD50 orally in Rabbit: 649 mg/kg LD50 dermal Rabbit 200 - 2000 mg/kg

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