Methanesulfonic acid
Methanesulfonic acid (CAS 75-75-2, CH3SO3H), a strong organic acid with a molecular weight of 96.11 g/mol, is a colourless liquid. It serves as a powerful Bronsted acid and a non-oxidizing acid catalyst, finding significant utility in chemical synthesis and industrial processes. Its applications range from esterification and alkylation reactions to use as an electrolyte in electroplating and as a cleaning agent for metal surfaces.
Chemical Synthesis
Methanesulfonic acid is widely employed as a strong acid catalyst in various organic reactions, including esterification, alkylation, and polymerisation. It is favoured for its high acidity and minimal oxidative properties.
Electroplating and Electrolytes
Its excellent conductivity and stability make it a suitable electrolyte component in electroplating baths, particularly for tin and tin-alloy plating, ensuring smooth and bright finishes.
Industrial Cleaning
Methanesulfonic acid is an effective agent for removing rust, scale, and other metal contaminants from surfaces. It is used in industrial cleaning formulations for metal treatment and maintenance.
Pharmaceutical Intermediates
It acts as a reagent or catalyst in the synthesis of various pharmaceutical intermediates, contributing to the production of active pharmaceutical ingredients (APIs).
| Molecular weight | 96.11 |
|---|---|
| Linear formula | CH3SO3H |
| Boiling point | 167 °C/10 mmHg(lit.) |
| Density | 1.481 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.429(lit.)n20/D 1.429 |
| Concentration | ~70% in H2O |
| Vapour pressure | 1 mmHg (20 °C) |
| Melting point | 17-19 °C(lit.) |
| Vapour density | 3.3 (vs air) |
| Storage temperature | 2-8°C |
Hazard statements
- H290May be corrosive to metals
- H302Harmful if swallowed
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 189 °C / 372.2 °F |
| Transport (UN / ADR) | UN 3265 8 / PGII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | C |
| Risk statements (R) | 21/22-34 |
| Safety statements (S) | 26-36-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Uv Absorption | λ: 240-320 nm Amax: <0.4 |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Methanesulfonic acid used for?
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Methanesulfonic acid is used as a catalyst in organic synthesis, an electrolyte in electroplating, and as an industrial cleaning agent for metal surfaces.
What is the CAS number and formula for Methanesulfonic acid?
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The CAS number is 75-75-2 and the chemical formula is CH3SO3H.
What grade and purity does Tech Serve Solutions supply for Methanesulfonic acid?
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Tech Serve Solutions supplies Methanesulfonic acid at a concentration of approximately 70% in water. We do not represent this product as USP, BP, or EP grade unless explicitly stated in the product specifications.
How should Methanesulfonic acid be handled safely?
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Methanesulfonic acid is corrosive and harmful if swallowed or in contact with skin. Handle with appropriate personal protective equipment, including gloves, eye protection (goggles and face shield), and respiratory protection, in a well-ventilated area. Consult the Safety Data Sheet for detailed handling instructions.
Is Methanesulfonic acid shipped or exported by TSS?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including Methanesulfonic acid.
How can I request a sample or quote for Methanesulfonic acid?
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Please contact our sales team directly to request a sample or a quotation for Methanesulfonic acid.
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