11317

Methanesulfonic acid

• Linear Formula: CH₃SO₃H
• CAS Number: 75-75-2
• Molecular Weight: 96.11
• Beilstein: 1446024
• EC Number: 200-898-6
• MDL number: MFCD00007518
• UNSPSC Code: 12352100
• NACRES: NA.21

Properties

• biological source: synthetic
• Quality Level: 500
• vapor density: 3.3 (vs air)
• vapor pressure: 1 mmHg ( 20 °C)
• Assay: 98.0-102.0% (1 M NaOH, T)
• form: liquid
• impurities: ≤5 ppm ethyl methansesulfonate (GC); ≤5 ppm isopropyl methanesulfonate (GC); ≤5 ppm methanesulfonyl chloride (GC); ≤5 ppm methyl methanesulfonate (GC)
• evapn. residue: ≤0.1%
• refractive index: n20/D 1.429 (lit.)
• bp: 167 °C/10 mmHg (lit.)
• mp: 17-19 °C (lit.)
• density: 1.475-1.485 g/mL at 20 °C; 1.481 g/mL at 25 °C (lit.)
• anion traces: chloride (Cl^-): ≤50 ppm; sulfate (SO₄^2-): ≤200 ppm
• cation traces: Ta: ≤5 ppm
• suitability: corresponds for IR spectroscopy
• SMILES string: O=S(O)(C)=O
• InChI: 1S/CH4O3S/c1-5(2,3)4/h1H3,(H,2,3,4)
• InChI key: AFVFQIVMOAPDHO-UHFFFAOYSA-N

Safety Information

• Pictograms: GHS05,GHS07
• Signal Word: Danger
• Hazard Statements: H290,H302 + H312,H314,H335
• Precautionary Statements: P234 - P261 - P280 - P301 + P312 - P303 + P361 + P353 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 4 Dermal - Acute Tox. 4 Oral - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1B - STOT SE 3
• Target Organs: Respiratory system
• Storage Class Code: 8A - Combustible corrosive hazardous materials
• WGK: WGK 1
• Flash Point(F): 372.2 °F - closed cup
• Flash Point(C): 189 °C - closed cup