Molekula
2-Mercaptoethanesulfonic acid sodium salt (Mesna)
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
2-Mercaptoethanesulfonic acid sodium salt, commonly known as Mesna, is a sulfhydryl compound used primarily as a urinary tract protective agent to prevent hemorrhagic cystitis caused by certain chemotherapy drugs. It is available in powder form with a molecular formula of C2H5NaO3S2, a molecular weight of 164.18 g/mol, and is stable at ambient storage conditions. The substance carries the signal word Danger, with hazard statements H315, H317, H319, H334 and H335, including respiratory sensitisation. Molekula supplies Mesna 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
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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5 g — £30.90 per pack ex VAT · £37.08 inc. VAT
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25 g — £77.70 per pack ex VAT · £93.24 inc. VAT
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 | White or slightly yellow crystalline powder |
| Impurity A | ≤0.3% |
| Impurity B | ≤0.3% |
| Identification | Conforms to reference |
| pH | 4.5 - 6 |
| Impurity C | ≤0.2% |
| Impurity D | ≤3.0% |
| Loss on Drying | ≤1.0% |
| Chloride (Cl-) | ≤250ppm |
| Solubility | Freely soluble in water, slightly soluble in ethanol, practically insoluble in cyclhexane |
| Assay | 96% - 102% |
| Ethanol | ≤5000ppm |
| Isopropanol | ≤5000ppm |
| Any other impurity | ≤0.1% |
| Sulphates (SO4)(2-) | ≤300ppm |
| Impurity E | ≤0.3% |
| Sum of any other substances | ≤0.3% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 17418243 |
| CAS Number | 19767-45-4 |
| IUPAC Name | sodium 2-sulfanylethanesulfonate |
| EC Number | 243-285-9 |
| Molecular Formula | C2H5NaO3S2 |
| Molecular Weight | 164.18 |
| Exact Mass | 163.9578 |
| SMILES | C(CS(=O)(=O)[O-])S.[Na+] |
| InChIKey | XOGTZOOQQBDUSI-UHFFFAOYSA-M |
| InChI | InChI=1S/C2H6O3S2.Na/c3-7(4,5)2-1-6;/h6H,1-2H2,(H,3,4,5);/q;+1/p-1 |
| PubChem CID | 23662354 |
| REACH Code | Y110 |
| HTS Code | 2930.90.9235 |
| Tariff Code | 2930909599 |
Safety & GHS
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Health Hazard
GHS07
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Serious Health Hazard
GHS08
Hazard statements
- H315 Causes skin irritation
- H317 May cause an allergic skin reaction
- H319 Causes serious eye irritation
- H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P303+P361+P353 IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower
- P304+312 IF INHALED: Call a POISON CENTER or doctor/physician if you feel unwell
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, 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
- 2-Mercaptoethanesulfonic acid sodium salt
- Coenzyme M sodium salt
- mesna
- Mesnex
- Mesnum
- Mistabron
- Mistabronco
- Mitexan
- Sodium 2-mercaptoethanesulfonate
- Uromitexan
Frequently asked questions
What is 2-Mercaptoethanesulfonic acid sodium salt (Mesna) used for?
Mesna is primarily used as a protective agent against the nephrotoxic and urotoxic effects of chemotherapy drugs like ifosfamide and cyclophosphamide.
What is the chemical formula and molecular weight of Mesna?
The formula is C2H5NaO3S2 and the molecular weight is 164.18 g/mol.
How should Mesna be stored?
Mesna should be stored at ambient temperature, protected from moisture and light.
What grade of Mesna does Molekula supply?
Molekula supplies Mesna in pharmaceutical grade, suitable for research and clinical applications.
Can Molekula supply Mesna in bulk quantities?
Yes, Molekula can supply Mesna in bulk quantities—please contact our sales team for volume pricing and availability.
What documentation comes with a Mesna order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS); additional documentation is available upon request.
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.