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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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
CAS16816-67-4
dietary supplement and cosmetic ingredient
ReferenceSame Category
Creatine hydrochloride
CAS17050-09-8
creatine hydrochloride dietary supplement
ReferenceSame Category
Betaine monohydrate
CAS17146-86-0
osmoprotectant and feed additive
Safety Reference
Danger
H315Causes skin irritation
H318Causes serious eye damage
H335May cause respiratory irritation
H302Harmful if swallowed
Customs Tariff Classification
The international HS code for POTASSIUM METABISULFITE (CAS 16731-55-8) is 2832.20.
HS code (international, 6-digit)
2832.20
EU CN code (8-digit)
2832 20 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
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
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