8.06022

Methanesulfonic acid

for synthesis

• Synonym(s): Methanesulfonic acid, MSA
• Empirical Formula (Hill Notation): CH₄O₃S
• CAS Number: 75-75-2
• Molecular Weight: 96.11
• MDL number: MFCD00007518
• UNSPSC Code: 12352106
• EC Index Number: 200-898-6
• NACRES: NA.22

Properties

• vapor pressure: <1 hPa ( 20 °C)
• Quality Level: 200
• assay: ≥99.0% (acidimetric)
• form: liquid
• 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

Description

Application

• Methanesulfonic Acid in Hydrometallurgy: This paper reviews the properties of methanesulfonic acid and its applications in hydrometallurgy, highlighting its benefits over other acids. (Binnemans and Jones, 2023).
• The Role of MSA in Aerosol Formation and Growth: This study investigates how MSA can influence aerosol formation and the associated radiative forcings, emphasizing its environmental impacts. (Hodshire et al., 2019).
• Organic Acids in New Particle Formation: Research on the role of organic acids in enhancing MSA-driven new particle formation, providing insights into atmospheric chemistry. (Zhang et al., 2022).
• Methanesulfonic Acid as a Sustainable Acidic Solvent: This article discusses the use of MSA for recovering metals from zinc industry residue, showcasing its applications in sustainable metallurgy. (Palden et al., 2019).

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.

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. 1 - STOT SE 3
• target_organs: Respiratory system
• Storage Class: 8A - Combustible corrosive hazardous materials
• wgk_germany: WGK 1
• flash_point_f: 372.2 °F - closed cup
• flash_point_c: 189 °C - closed cup