Na2O5S2
190.11 g/mol
Food AdditiveDanger
Sodium metabisulfite
CAS7681-57-4EC231-673-0
Category
Food Additive
Compound Class
Inorganic Salt
Primary Use
Antioxidant and preservative in food
Sodium metabisulfite is an inorganic compound commonly used as an antioxidant and preservative in food. It helps prevent oxidation and spoilage, extending the shelf life of various food products.
Antioxidant in food preservationPreservative to inhibit microbial growthBleaching agent in food processing
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
Potassium metabisulfite
CAS16731-55-8
Food preservative and antioxidant
ReferenceSame Category
Natamycin
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Antimicrobial food preservative
ReferenceSame Category
Ribonuclease A family member 1, pancreatic
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naturally occurring dipeptide supplement
ReferenceSame Category
DL-alpha-Tocopherol acetate
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antioxidant food additive
ReferenceSame Category
Citric acid
CAS77-92-9
acidity regulator and preservative
Safety Reference
Danger
H302Harmful if swallowed
H318Causes serious eye damage
H317May cause an allergic skin reaction
H334May cause allergy or asthma symptoms or breathing difficulties if inhaled
H335May cause respiratory irritation
H402Harmful to aquatic life
H412Harmful to aquatic life with long lasting effects
H320Causes eye irritation
H372Causes damage to organs through prolonged or repeated exposure
Customs Tariff Classification
The international HS code for Sodium metabisulfite (CAS 7681-57-4) is 2832.10.
HS code (international, 6-digit)
2832.10
EU CN code (8-digit)
2832 10 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
HRZFUMHJMZEROT-UHFFFAOYSA-L
SMILES
[O-]S(=O)S(=O)(=O)[O-].[Na+].[Na+]
Synonyms (35)
- E-223
- Campden Tablets
- DISODIUM PYROSULPHITE
- Disodium disulphite
- Disodium metabisulfite
- Disodium pentaoxodisulfate
- Disodium pyrosulfite
- Fertisilo
- INS NO.223
- Natrii disulfis
- Natrium metabisulfurosum
- Natrium pyrosulfit
- Natriumbisulfit
- Natriummetabisulfit
- SODIUM METABISULFITE [MART.]
- Sodium bisulfite anhydrous
- Sodium disulfite
- Sodium metabisulfite
- Sodium metabisulfite (NF)
- Sodium metabisulfite (e 223)
- Sodium metabisulfite, SO2
- Sodium metabisulphite
- Sodium pyrosulfite
- Sodium pyrosulfite (JP17)
- Sodium pyrosulfite (Na2S2O5)
- sodium metabisuifite
- sodium metabisuiphite
- sodium pyrosulphite
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