All Photos(1)

8.06022

Sigma-Aldrich

Methanesulfonic acid

for synthesis

Synonym(s):
MSA, Methanesulfonic acid
Empirical Formula (Hill Notation):
CH4O3S
CAS Number:
Molecular Weight:
96.11
MDL number:
EC Index Number:
200-898-6

Quality Level

vapor pressure

<1 hPa ( 20 °C)

assay

≥99.0% (acidimetric)

potency

649 mg/kg LD50, oral (Rat)
200-2000 mg/kg LD50, skin (Rabbit)

bp

167 °C/13 hPa

mp

20 °C

transition temp

flash point 189 °C

solubility

1000 g/L

density

1.48 g/cm3 at 20 °C

storage temp.

2-30°C

InChI

1S/CH4O3S/c1-5(2,3)4/h1H3,(H,2,3,4)

InChI key

AFVFQIVMOAPDHO-UHFFFAOYSA-N

Analysis Note

Appearance of substance (visual): colourless to brownish
Assay (acidimetric): ≥ 99.0 %
Density (d 20 °C/ 4 °C): 1.478 - 1.482
Due to its specific melting range the product may be solid, liquid, a solidified melt or a supercooled melt.

Pictograms

CorrosionExclamation mark

Signal Word

Danger

Hazard Statements

Hazard Classifications

Acute Tox. 4 Oral - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

6.1A - Combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 1

Flash Point(F)

372.2 °F - closed cup

Flash Point(C)

189 °C - closed cup

Certificate of Analysis

Certificate of Origin

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