Home Categories Chemical Reagents Methanesulfonic acid
A5406412

Methanesulfonic acid , 99% , 75-75-2

Synonym(s):
Methanesulfonic acid;Methanesulfonic acid solution;MSA

CAS NO.:75-75-2

Empirical Formula: CH4O3S

Molecular Weight: 96.11

MDL number: MFCD00007518

EINECS: 200-898-6

Update time: 2022-07-08

PRODUCT 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

Description and Uses

Polymerization catalyst.
Methanesulfonic acid has been developed as an esterification catalyst in place of sulfuric acid for the synthesis of resins in paints and coatings. One of the major advantages of methanesulfonic acid over sulfuric acid is that it is not an oxidizing species.

Safety

Symbol(GHS) 
GHS05,GHS07
Signal word  Danger
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
Toxicity LD50 orally in Rabbit: 649 mg/kg LD50 dermal Rabbit 200 - 2000 mg/kg

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