Molekula
2-Mercaptopyridine-N-oxide sodium salt, 40% w/w aqueous solution
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-Mercaptopyridine-N-oxide sodium salt (sodium pyrithione) is a sulfur-containing heterocyclic compound primarily used as an antimicrobial biocide, serving as an antifungal and antibacterial preservative in metalworking fluids, coatings, cosmetics and other industrial products. This 40% w/w aqueous solution has the CAS number 3811-73-2, with a molecular formula of C5H4NNaOS and a molecular weight of 149.15. It should be stored at ambient conditions and carries a signal word of "Warning" for safety. Molekula supplies 2-Mercaptopyridine-N-oxide sodium salt 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.
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Specifications
| Property | Value |
|---|---|
| Appearance | light yellow liquid |
| Identification | Conforms to reference |
| pH | 8.5-10.5 |
| Specific Gravity | 1.10-1.30 |
| Assay | ≥40% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 9 |
| Packing Group | III |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 90029994 |
| CAS Number | 3811-73-2 |
| IUPAC Name | sodium 1-oxidopyridine-2-thione |
| EC Number | 223-296-5 |
| Molecular Formula | C5H4NNaOS |
| Molecular Weight | 149.15 |
| Exact Mass | 148.9911 |
| SMILES | C1=CC(=S)N(C=C1)[O-].[Na+] |
| InChIKey | XNRNJIIJLOFJEK-UHFFFAOYSA-N |
| InChI | InChI=1S/C5H4NOS.Na/c7-6-4-2-1-3-5(6)8;/h1-4H;/q-1;+1 |
| PubChem CID | 19658 |
| UN Number | UN3082 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2933.39.9200 |
| Tariff Code | 2933399937 |
Safety & GHS
-
Health Hazard
GHS07
-
Hazardous to the Environment
GHS09
Hazard statements
- EUH070 Toxic by eye contact
- H302 + H312 + H332 Harmful if swallowed, in contact with skin or if inhaled
- H317 May cause an allergic skin reaction
- H319 Causes serious eye irritation
- H372 Causes damage to organs through prolonged or repeated exposure
- H411 Toxic to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- 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, 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
- 1-Hydroxy-2(1H)-pyridinethione, sodium salt
- 2-Mercaptopyridine 1-oxide sodium salt
- 2-Mercaptopyridine n-oxide sodium
- 2-Mercaptopyridine N-oxide sodium salt anhydrous
- 2-Pyridinethiol 1-Oxide Sodium Salt
- 2-Pyridinethiol, 1-oxide, sodium salt (1:1)
- Omadine sodium
- Prestwick_78
- sodium (1-oxidopyridin-1-ium-2-yl)sulfanide
- Sodium (2-pyridylthio)-N-oxide
Frequently asked questions
What is 2-Mercaptopyridine-N-oxide sodium salt used for?
This compound, also known as sodium pyrithione or sodium omadine, is primarily used as an antimicrobial biocide and preservative, providing antifungal and antibacterial protection in metalworking fluids, coatings, cosmetics and other industrial products. In organic synthesis, N-hydroxypyridine-2-thione is used to prepare Barton esters for radical decarboxylation.
What is the chemical formula and molecular weight?
The formula is C₅H₄NNaOS, and the molecular weight is 149.15 g/mol (for the anhydrous salt). The product is supplied as a 40% w/w aqueous solution, so the effective MW per gram of active ingredient must be adjusted accordingly.
How should this product be stored?
Store at ambient temperature in a tightly sealed, airtight container. Protect from prolonged exposure to light and moisture, though the aqueous solution mitigates some stability risks.
What purity grades or forms are available for this compound?
Molekula supplies this product exclusively as a 40% w/w aqueous solution. No other grades (e.g., solid or higher-purity solutions) are currently offered.
Can Molekula supply this product in bulk quantities?
Yes, we can provide bulk quantities of this 40% aqueous solution, with minimum order quantities and pricing tailored to your needs. Contact our sales team for specific bulk inquiries.
What documentation comes with the order?
Each order includes a Certificate of Analysis (CoA) detailing purity, water content, and key impurities, along with a Material Safety Data Sheet (MSDS) and Safety Data Sheet (SDS). Additional documentation, such as a batch-specific CoA, can be provided upon request.
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