Molekula
Potassium sulfite
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Certificate of Analysis with every batch
Potassium sulfite (K₂SO₃) is an inorganic salt primarily used as a reducing agent, antioxidant, and preservative in food, pharmaceuticals, and water treatment. It prevents oxidation in dried fruits, wines, and processed foods, while also serving as a bleaching agent and corrosion inhibitor in industrial applications. This white crystalline powder has a CAS number of 10117-38-1, a molecular weight of 158.26 g/mol, and requires ambient storage. It carries a **Warning** signal word under GHS classification. Molekula supplies potassium sulfite from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Overview
Potassium sulfite (K₂SO₃) is an inorganic salt primarily used as a reducing agent, antioxidant, and preservative in food, pharmaceuticals, and water treatment. It prevents oxidation in dried fruits, wines, and processed foods, while also serving as a bleaching agent and corrosion inhibitor in industrial applications. This white crystalline powder has a CAS number of 10117-38-1, a molecular weight of 158.26 g/mol, and requires ambient storage. It carries a **Warning** signal word under GHS classification. Molekula supplies potassium sulfite from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Pricing & pack sizes
Specifications
| Property | Value |
|---|---|
| Appearance | White or off white powder |
| Assay | ≥95% |
| Water insoluble matter | ≤0.1% |
| Iron (Fe) | ≤0.1% |
| Thiosulphate (S2O3) | ≤0.05% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Base |
Identification
| Property | Value |
|---|---|
| SKU | 90027069 |
| CAS Number | 10117-38-1 |
| Molecular Formula | K2SO3 |
| Molecular Weight | 158.26 |
| SMILES | [O-]S(=O)[O-].[K+].[K+] |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2832200000 |
| Tariff Code | 2832200000 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- EUH031 Contact with acids liberates toxic gas
Precautionary statements
- P231+232 Handle under inert gas. Protect from moisture
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- 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
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, 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 potassium sulfite commonly used for?
Potassium sulfite (K₂SO₃) is primarily used as a reducing agent in photography, as an antioxidant in food and beverages, and in water treatment to remove chlorine and oxygen.
What is the molecular formula and molecular weight of potassium sulfite?
The molecular formula is **K₂SO₃**, and the molecular weight is **158.26 g/mol**.
How should potassium sulfite be stored?
Store potassium sulfite in a **cool, dry place at ambient temperature**, away from moisture and incompatible substances like strong oxidizers.
What grades of potassium sulfite does Molekula supply?
Molekula supplies **technical grade** potassium sulfite, suitable for industrial, food-grade, and laboratory applications.
Can Molekula supply potassium sulfite in bulk quantities?
Yes, Molekula can supply potassium sulfite in **bulk quantities**, with packaging options including drums, bags, or custom solutions depending on order size.
What documentation comes with a potassium sulfite order?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and, if applicable, a **Food Grade Certificate** for compliant applications.
Ready to order or need a custom pack?
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