Molekula
Methanesulfonic acid, pharmaceutical grade
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Methanesulfonic acid (CAS 75-75-2) is a strong organic acid (CH₃SO₃H, MW 96.11) widely used in pharmaceutical synthesis, peptide cleavage, and as a catalyst in organic reactions. It is also employed in battery electrolyte formulations and as a reagent in analytical chemistry. Stored at ambient conditions, it carries a **Danger** signal word due to its corrosive properties. Molekula supplies Methanesulfonic acid, pharmaceutical grade, from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Clear Liquid |
| Colour (Pt-Co) | max 25 |
| Assay | min 99.5% |
| Methane Sulfonyl Chloride | max 2ppm |
| Methyl Methane Sulfonate | max 1ppm |
| Ethyl Methane Sulfonate | max 0.5ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 189 °C |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Solid |
| Melting Point | 20 °C |
| Boiling Point | 167 °C at 10 mmHg |
| Density | 1.4812 g/cm³ at 18 °C |
| Water Solubility | 1000 g/L at 20 °C (Miscible) |
| Solubility (other solvents) | Soluble in alcohol, ether |
| Vapour Pressure | 4.28 × 10⁻⁴ mmHg at 25 °C |
| Refractive Index | 1.4317 |
| pKa | pKa = -1.86 |
Source: PubChem CID 6395 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 90030482 |
| CAS Number | 75-75-2 |
| IUPAC Name | methanesulfonic acid |
| EC Number | 200-898-6 |
| Molecular Formula | CH3SO3H |
| Molecular Weight | 96.11 |
| Exact Mass | 95.9881 |
| SMILES | CS(=O)(=O)O |
| InChIKey | AFVFQIVMOAPDHO-UHFFFAOYSA-N |
| InChI | InChI=1S/CH4O3S/c1-5(2,3)4/h1H3,(H,2,3,4) |
| PubChem CID | 6395 |
| UN Number | UN3265 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29041050 |
| Tariff Code | 2904100090 |
Safety & GHS
-
Corrosive
GHS05
-
Health Hazard
GHS07
Hazard statements
- H290 May be corrosive to metals
- H302+312 Harmful if swallowed or in contact with skin
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
- H318 Causes serious eye damage
- H335 May cause respiratory irritation
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is methanesulfonic acid (pharmaceutical grade) commonly used for?
It is primarily used in pharmaceutical formulations as a catalyst, solvent, and pH adjuster, as well as in the synthesis of APIs and intermediates.
What is the chemical formula and molecular weight of methanesulfonic acid?
The formula is **CH₃SO₃H**, and the molecular weight is **96.11 g/mol**.
How should methanesulfonic acid (pharmaceutical grade) be stored?
Store in a tightly sealed container at **ambient temperature**, away from incompatible substances and moisture.
What grade of methanesulfonic acid does Molekula supply, and is it suitable for pharmaceutical applications?
Molekula supplies **pharmaceutical grade** methanesulfonic acid, meeting strict purity and regulatory requirements for pharmaceutical use.
Can Molekula supply methanesulfonic acid in bulk quantities?
Yes, bulk quantities are available upon request—please contact our sales team for pricing and logistics details.
What documentation is provided with a methanesulfonic acid order?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.