Molekula
Potassium (poly)sulfide
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
Potassium (poly)sulfide is a versatile inorganic chemical primarily used in the production of rubber, leather tanning, and as a depilatory agent in industrial settings. It is also employed in wastewater treatment and metal surface treatment processes. This product has a CAS number of 39365-88-3 and is stored at ambient conditions. It carries a Danger signal word. Molekula supplies Potassium (poly)sulfide 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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1 kg — £62.10 per pack ex VAT · £74.52 inc. VAT
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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 | Brown - green lumps |
| Identification | Conforms |
| Appearance of Solution | Yellowish and clear |
| Insoluble in water | ≤0.5% |
| Assay (S) | ≥ 12.8% |
| Assay (K2S) | ≥ 44% |
| Total nitrogen (N) | ≤ 0.01% |
| Size of the fragments | 5-60mm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Base |
Identification
| Property | Value |
|---|---|
| SKU | 90004115 |
| CAS Number | 39365-88-3 |
| Molecular Formula | K2SO4/(K2Sx)2 |
| Molecular Weight | - |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2830.90.9000 |
| Tariff Code | 2830908500 |
Safety & GHS
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Corrosive
GHS05
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Health Hazard
GHS07
Hazard statements
- EUH031 Contact with acids liberates toxic gas
- H302 Harmful if swallowed
- H315 Causes skin irritation
- H317 May cause an allergic skin reaction
- H318 Causes serious eye damage
Precautionary statements
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P333+313 IF skin irritation or a rash occurs: Get medical advice/attention
- P337+313 If eye irritation persists 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
No alternate names recorded for this product.
Frequently asked questions
What is potassium (poly)sulfide commonly used for?
Potassium (poly)sulfide is primarily used in chemical synthesis, such as in the production of sulfur-containing organic compounds, vulcanization accelerators, and as a reagent in analytical chemistry.
What is the molecular formula and molecular weight of potassium (poly)sulfide?
The stated molecular formula for this product (CAS 39365-88-3) is K2SO4/(K2Sx)2. It is a mixture of potassium sulfate and potassium polysulfides, traditionally known as liver of sulfur, not a pure K2Sx polysulfide. Because the polysulfide sulfur chain length varies, no single molecular weight is given.
How should potassium (poly)sulfide be stored?
Store in a tightly sealed container at ambient temperature, away from moisture, oxidizing agents, and incompatible materials to prevent degradation or hazardous reactions.
What grade or purity levels of potassium (poly)sulfide does Molekula supply?
Molekula supplies potassium (poly)sulfide in technical or reagent grade, with typical purities ranging from 40–60% (w/w) active sulfur content; exact specifications are available upon inquiry.
Can Molekula supply potassium (poly)sulfide in bulk quantities?
Yes, Molekula can provide potassium (poly)sulfide in bulk, with packaging options tailored to customer requirements—contact our sales team for specific volumes and logistics details.
What documentation is provided with an order of potassium (poly)sulfide?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a packing list; additional documentation like batch-specific reports 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.