Molekula
Potassium sulfite
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · 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.
This substance is available from Molekula on enquiry. Full specification, Safety Data Sheet and Certificate of Analysis documentation are provided with your quotation once our team confirms the grade and pack size you need.
Overview
- SKU
- 90027069
- CAS Number
- 10117-38-1
- IUPAC Name
- dipotassium;sulfite
- EC Number
- 233-321-1
- Molecular Formula
- K2SO3
- Molecular Weight
- 158.26
- Exact Mass
- 157.8842
- SMILES
- [O-]S(=O)[O-].[K+].[K+]
- InChIKey
- BHZRJJOHZFYXTO-UHFFFAOYSA-L
- InChI
- InChI=1S/2K.H2O3S/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2
- PubChem CID
- 24958
Synonyms
- Dipotassium sulfite
- DIPOTASSIUM SULPHITE
- INS NO.225
- Kaliumsulfit
- Potassium sulfite (K2SO3)
- Potassium sulfite(IV)
- Potassium sulphite
- Sulfurous acid, dipotassium salt
- Sulfurous acid, potassium salt
- Sulfurous acid, potassium salt (1:2)
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.
Related products
Molekula has supplied fine chemicals and biochemicals since 1999, and its facilities are ISO 9001:2015 and ISO 14001:2015 certified. Every dispatched batch is logged with a batch number and matched to a Certificate of Analysis, and Safety Data Sheets are available in five languages.