K2O5S2
222.33 g/mol
Food AdditiveDanger
POTASSIUM METABISULFITE
CAS16731-55-8EC240-795-3
Category
Food Additive
Compound Class
Inorganic Salt
Primary Use
Food preservative and antioxidant
Potassium metabisulfite is a white crystalline powder with a pungent odor, used primarily as an antioxidant and chemical sterilant. It is chemically similar to sodium metabisulfite and is commonly employed as a food preservative and antioxidant.
Food preservativeAntioxidantChemical sterilant
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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CAS 16731-55-8
Related Compounds
StrongSame Parent
Sodium metabisulfite
CAS7681-57-4
Antioxidant and preservative in food
ReferenceSame Category
Potassium paraben
CAS16782-08-4
preservative in cosmetics and food
ReferenceSame Category
Pantethine
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dietary supplement and cosmetic ingredient
ReferenceSame Category
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creatine hydrochloride dietary supplement
ReferenceSame Category
Betaine monohydrate
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osmoprotectant and feed additive
Safety Reference
Danger
H315Causes skin irritation
H318Causes serious eye damage
H335May cause respiratory irritation
H302Harmful if swallowed
Identifiers
InChIKey
RWPGFSMJFRPDDP-UHFFFAOYSA-L
SMILES
[O-]S(=O)S(=O)(=O)[O-].[K+].[K+]
Synonyms (24)
- E-224
- Potassium disulfite, USP, 51.8-57.6%
- Potassium disulfite, puriss., meets analytical specification of Ph.Eur., BP, NF, FCC, E224, 95.0-101.0% (iodometric), powder, 51.8-57.6% sulfur dioxide
- Dipotassium disulfite
- Dipotassium disulphite
- Dipotassium metabisulfite
- Dipotassium pyrosulfite
- Kaliumpyrosulfit
- POTASSIUM METABISULFITE
- Potassium disulfite
- Potassium disulfite (K2S2O5)
- Potassium metabisulfite (NF)
- Potassium pentaoxodisulfate
- Potassium pyrosulfite
- Sobisu
- potassium metabisulphite