471348

Methanesulfonic acid solution

70 wt. % in H₂O

• Synonym(s): Mesylic acid, MsOH
• Linear Formula: CH₃SO₃H
• CAS Number: 75-75-2
• Molecular Weight: 96.11
• Beilstein/REAXYS Number: 1446024
• MDL number: MFCD00007518
• UNSPSC Code: 12352100
• PubChem Substance ID: 24870724
• NACRES: NA.21

Properties

• vapor density: 3.3 (vs air)
• Quality Level: 200
• vapor pressure: <1 mmHg ( 20 °C)
• concentration: 70 wt. % in H₂O
• impurities: ≤1,000 ppm Sulfate (SO₄); ≤10 ppm Iron; ≤50 ppm Chloride (Cl)
• refractive index: n20/D 1.416
• density: 1.319 g/mL at 25 °C
• SMILES string: CS(O)(=O)=O
• InChI: 1S/CH4O3S/c1-5(2,3)4/h1H3,(H,2,3,4)
• InChI key: AFVFQIVMOAPDHO-UHFFFAOYSA-N

Description

General description

The product is a 70% aqueous solution of methanesulfonic acid (MSA). MSA is a strong organic acid. The chemical oxidation of dimetyl sulfide in the atmosphere leads to the formation of MSA in large quantities. MSA undergoes biodegradation by forming CO₂ and sulphate. It is considered a green acid as it is less toxic and corrosive in comparison to mineral acids.1 The aqueous MSA solution has been considered a model electrolyte for electrochemical processes.

Application

Methanesulfonic acid solution may be used to study the corrosion behavior of stainless steel.

Legal Information

Product of Arkema Inc.

Safety Information

• pictograms: GHS05,GHS07
• signalword: Danger
• hcodes: H290,H302,H314,H335
• pcodes: P234 - P261 - P280 - P301 + P312 - P303 + P361 + P353 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 4 Oral - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1B - STOT SE 3
• target_organs: Respiratory system
• Storage Class: 8A - Combustible corrosive hazardous materials
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter