Methanesulfonic acid CAS#75-75-2

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.)

Fp 

>230 °F

storage temp. 

2-8°C

solubility 

water: soluble1,000 g/L at 20°C

pka

-2.6(at 25℃)

form 

Solution

color 

brown

Specific Gravity

1.48 (18/4℃)

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)

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