Methanesulfonic acid CAS Number: 75-75-2
Pharmaceutical Materials 2025-03-02
Chemical Name: Methanesulfonic acid
CAS Number: 75-75-2
Molecular Formula: CH4O3S
Molecular Weight: 96.11 g/mol
Appearance: Colorless to slightly brown oil, solidifies at low temperatures
Usage: Widely used in pharmaceuticals, pesticides, as a catalyst, and more.
Methanesulfonic acid (CAS Number: 75-75-2) is an inorganic acid with a molecular formula of CH4O3S and a molecular weight of 96.11 g/mol. It is a colorless to pale yellow liquid that is soluble in water, alcohols, and ethers but insoluble in alkanes, benzene, and toluene. Methanesulfonic acid is known for its strong acidity and corrosive properties, making it useful in various industrial applications such as a catalyst in chemical reactions, a solvent, and a raw material in the pharmaceutical and pesticide industries. Due to its corrosive nature, it requires careful handling and storage.
| Property Category | Details |
|---|---|
| Chemical Identity | Methanesulfonic Acid |
| CAS Number | 75-75-2 |
| Molecular Formula | CH4O3S |
| Molecular Weight | 96.11 g/mol |
| Physical Properties | |
| Appearance | Colorless to pale yellow liquid |
| Density | 1.4812 g/cm³ at 18°C |
| Melting Point | 19-20°C |
| Boiling Point | 167°C at 10 mmHg |
| Flash Point | >230°F |
| Refractive Index | 1.4317 at 16°C |
| Chemical Properties | |
| pH (in aqueous solution) | Strongly acidic |
| Solubility | Soluble in water, alcohols, and ethers; insoluble in alkanes, benzene, and toluene |
| Corrosivity | Corrosive to metals such as iron, copper, and lead |
| Stability | Stable under normal conditions; decomposes at high temperatures or in the presence of strong bases |
| Reactivity | Reacts with metals, oxides, and bases; may catalyze chemical reactions |
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