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8.06022 EMD Millipore

Methanesulfonic acid

Methanesulfonic acid for synthesis. CAS 75-75-2, EC Number 200-898-6, chemical formula CH₃SO₃H., for synthesis

Synonym: MSA

  • CAS Number 75-75-2

  • Linear Formula CH₄O₃S

  • Molecular Weight 96.11 g/mol

  •  EC Number 200-898-6



Related Categories Acids, Acids & Bases, Building Blocks, Chemical Synthesis, Organic Building Blocks,
packaging   1 l in Glass bottle (8060221000)
  25 kg in Barrel PE/met (8060229025)
  5 ml in Glass bottle (8060220005)
bp   167 °C (13 hPa)
vapor pressure   <1 hPa (20 °C)
solubility   1000 g/l
density   1.48 g/cm3 (20 °C)
flash point   189 °C
mp   20 °C
LD 50 oral   LD50 Rat 649 mg/kg
LD 50 dermal   LD50 Rabbit 200 - 2000 mg/kg
shipped in   ambient
storage temp.   Store below +30°C.
specifications   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.

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Safety Information

HS Code 
2904 10 00
Hazard Statement(s) 
H290: May be corrosive to metals.
H302 + H312: Harmful if swallowed or in contact with skin
H314: Causes severe skin burns and eye damage.
H335: May cause respiratory irritation.
Precautionary Statement(s) 
P280: Wear protective gloves/ protective clothing/ eye protection/ face protection.
P301 + P330 + P331: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P302 + P352: IF ON SKIN: Wash with plenty of soap and water.
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P308 + P310: IF exposed or concerned: immediately call a POISON CENTER or doctor/ physician.
Storage class 
6.1A Combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials
WGK 1 slightly water endangering
Liquid organic acids or solutions should be diluted, if necessary, and carefully neutralized with sodium hydrogen carbonate (Cat. No. 106323) or with sodium hydroxide (Cat. No 106462). Before filling into container D, check the pH with pH universal indicator strips (Cat. No. 109535).
Hazard Pictogram(s) 
GHS05  GHS05
Hazard Pictogram(s) 
GHS07  GHS07
Hazard Symbols 
Corrosive  Corrosive
Hazard Symbols 
Harmful  Harmful
Declaration (railroad and road) ADR, RID 
UN 2922 , 8 (6.1), II
Declaration (transport by air) IATA-DGR 
UN 2922 , 8 (6.1), II
Declaration (transport by sea) IMDG-Code 
UN 2922 , 8 (6.1), II, Segregation Group: 1 (Acids)
Categories of danger 
R Phrase 
R 21/22-34
Harmful in contact with skin and if swallowed.Causes burns.
S Phrase 
S 26-36/37/39-45
In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear suitable protective clothing, gloves and eye/face protection.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).
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