Molekula
Methanesulfonic acid (MSA 70%)
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 (MSA 70%) is a strong organic acid with high thermal stability, widely used in battery manufacturing (lithium-ion), pharmaceutical intermediates, and as a catalyst in organic synthesis. It also serves as a solvent and as an intermediate for methanesulfonyl chloride, and is used in metal plating, electrolytic metal finishing and printed circuit board manufacturing. It offers superior performance over traditional acids like sulfuric acid in many applications due to its lower volatility and higher purity. CAS 75-75-2, molecular formula CH3SO3H, molecular weight 96.11 g/mol. Stored at ambient conditions. Signal word: Danger. Molekula supplies Methanesulfonic acid (MSA 70%) 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 | Colourless or light yellow transparent liquid |
| Colour | ≤10ppm |
| Chloride (Cl-) | ≤10ppm |
| Assay | ≥70% |
| Iron (Fe) | ≤5ppm |
| Lead (Pb) | ≤5ppm |
| Sulphates (SO4)(2-) | ≤30ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 189 °C |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 90033735 |
| 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, Russian, 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 (MSA 70%) commonly used for?
Methanesulfonic acid (MSA 70%) is primarily used as a strong acid catalyst in organic synthesis, polymer production (e.g., polyesters, polycarbonates), and as a doping agent in lithium-ion battery manufacturing.
What is the chemical formula and molecular weight of MSA 70%?
The chemical formula is **CH₃SO₃H**, and the molecular weight is **96.11 g/mol** (for the anhydrous form).
How should methanesulfonic acid (MSA 70%) be stored?
Store MSA 70% in a tightly sealed container at **ambient temperature**, away from incompatible substances like strong oxidizers, bases, and metals.
What grades or purities of MSA 70% does Molekula supply?
Molekula supplies **technical-grade MSA 70%**, suitable for industrial applications requiring high purity and consistency.
Can Molekula supply methanesulfonic acid (MSA 70%) in bulk quantities?
Yes, Molekula can supply MSA 70% in **bulk quantities**, with packaging options including drums, IBCs, or tanker loads—contact us for specific requirements.
What documentation is provided with an order of MSA 70%?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a **Danger label** (Signal Word: *Danger*) per GHS regulations.
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.