Key Information
- Product Name: Methanesulfonic Acid
- Synonyms: Methane sulfonic acid; Methylsulfonic acid; Alkanesulfonic acid; MSA
- CAS Number: 75-75-2
- Molecular Formula: CH₄O₃S
- Molecular Weight: 96.1
Technical Specifications
| Parameter | Specification |
|---|---|
| Appearance | Colorless to yellowish clear oily liquid (or solid at low temperature) |
| Assay | ≥ 99% (also available: 85%, 70%) |
| Color (APHA) | ≤ 50 (≤ 25 / ≤ 10 for higher grades) |
| Chloride (Cl⁻) | ≤ 20 ppm (≤ 10 / ≤ 5 ppm optional) |
| Sulfate (SO₄²⁻) | ≤ 20 ppm |
| Iron (Fe) | ≤ 5 ppm (≤ 3 ppm optional) |
| Heavy Metals (Pb) | ≤ 5 ppm |
Applications
Methanesulfonic Acid is widely applied in the following industries:
Chemical Processing
- Catalyst in alkylation, esterification, and polymerization reactions
- Preferred due to strong acidity and low environmental impact
Pharmaceuticals
- Key intermediate in the synthesis of active pharmaceutical ingredients (APIs)
- High purity ensures consistent reaction performance
Electroplating & Surface Treatment
- Used in electroplating and electropolishing formulations
- MSA 70% is especially suitable for metal finishing processes
Industrial Cleaning & Formulation
- Effective descaling agent and formulation component in specialty cleaners
Packaging Options
- 250 kg PE drum
- ISO tank (bulk supply available)
Storage & Handling
Store in tightly sealed containers in a cool, dry, and well-ventilated area. Avoid contact with incompatible materials such as strong oxidizers. Use appropriate protective equipment when handling.