What does the restriction note for SODIUM SULFITE mean?

The restriction field for SODIUM SULFITE reads: III/99 V/9. This is the restriction note from the CosIng inventory. For authoritative conditions and limits, always refer to the linked annex entries.

What function does SODIUM SULFITE serve in cosmetics?

According to the EU CosIng inventory, SODIUM SULFITE carries the following function designation(s): ANTIOXIDANT, HAIR WAVING OR STRAIGHTENING, PRESERVATIVE, REDUCING.

What other records share CAS 7757-83-7?

CAS 7757-83-7 may appear across multiple EU annex records. The CAS lookup page shows all Annex II–VI entries sharing this identifier, useful for identifying cross-annex regulatory status of the same chemical substance.

How do I check if my formula contains SODIUM SULFITE?

Use the INCI Checker to screen a full ingredient list across selected markets, or use the substance market comparison to review this identity across all supported market datasets.

InventoryRef 3809511/08/2020

SODIUM SULFITE

Sodium sulphite

SODIUM SULFITE is linked to 2 EU annex records on this page. Inventory note: III/99 V/9.

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Regulatory evidence by market

This matrix separates verified ingredient rules from sources that are mapped but not yet imported. No imported rule does not mean the ingredient is permitted.

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Market	Evidence status	Records	Source language
European Union	Evidence linked Restricted entry found Open this evidence	2	English and EU languages
Great Britain	Evidence linked Permitted list with conditions Open this evidence	1	English
Canada	Source mapped Official source mapped; ingredient rule not imported	0	English and French
New Zealand	Evidence linked Permitted list with conditions Open this evidence	1	English
ASEAN	Evidence linked Permitted list with conditions Open this evidence	1	English and national languages
China	Source mapped Official source mapped; ingredient rule not imported	0	Chinese with selected English material
Japan	Source mapped Official source mapped; ingredient rule not imported	0	Japanese; official English translation available
South Korea	Evidence linked Restricted Open this evidence	1	Korean with some English names
United States	Source mapped Official source mapped; ingredient rule not imported	0	English
Australia	Source mapped Official source mapped; ingredient rule not imported	0	English
Brazil	Source mapped Official source mapped; ingredient rule not imported	0	Portuguese with INCI crosswalks
India	Source mapped Official source mapped; ingredient rule not imported	0	English and Hindi
Saudi Arabia	Source mapped Official source mapped; ingredient rule not imported	0	Arabic and English

Chemical identity and properties

PubChem 2D chemical structure for CAS 7757-83-7

CAS 7757-83-7PubChem CID 24437

Sodium Sulfite

Sodium sulfite is an inorganic sodium salt having sulfite as the counterion. It has a role as a reducing agent and a food preservative. It is an inorganic sodium salt and a sulfite salt. It contains a sulfite. — ChEBI

IUPAC name: disodium;sulfite

Molecular formula: Na2O3S
Molecular weight: 126.05 g/mol
Exact mass: 125.93635360 Da
Topological polar surface area: 82.4 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 4
Covalent units: 3
Defined stereocentres: 0

Also known as

Disodium sulfiteSodium sulfite anhydrousSodium sulphiteSulfurous acid, disodium saltNatrium sulfurosumSulftechNatriumsulfidNatriumsulfit

16 more reported names

S-WATNatrii sulphisAnhydrous sodium sulfiteSodium sulfite (Na2SO3)Exsiccated sodium sulfiteNatrum sulphurosumSodium sulphite anhydrousSulfurous acid, sodium salt (1:2)Sodium sulfite, anhydrousSodium sulfite, exsiccatedDried sodium sulfiteDisodium sulfite (Na2SO3)Anhydrous sodium sulphiteSodium sulfite (2:1)VTK01UQK3GINS NO.221

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:86477
ChEMBL:CHEMBL1945334
EPA DTXSID:DTXSID2044260
PubMed:23973939
PubMed:21873648
PubMed:20348042

Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for SODIUM SULFITE

INCI name

SODIUM SULFITE

Ph. Eur. name

natrii sulfis

Description

Sodium sulphite

Record provenance

Inventory reference: 38095
Imported identity: SODIUM SULFITE
Source update: 11/08/2020

European Commission CosIng source notes

Annex records for SODIUM SULFITE

Annex III Restriction reference

Entry 99

Inorganic sulfites and bisulfites (12)

Annex V Restriction reference

Entry 9

SODIUM SULFITE / AMMONIUM BISULFITE / AMMONIUM SULFITE / POTASSIUM SULFITE / POTASSIUM hydrogen SUL…

CAS: 7757-83-7 / 10192-30-0 / 10196-04-0 / 10117-38-1 / 7773-03-7 / 7631-90-5 / 7681-57-4 / 16731-55-8

EC: 231-821-4 / 233-469-7 / 233-484-9 / 233-321-1 / 231-870-1 /231-548-0 / 231-673-0 / 240-795-3

Key data

CAS

7757-83-7

231-821-4

Restriction

III/99 V/9

Function

ANTIOXIDANT: Inhibiting reactions promoted by oxygen, thus avoiding oxidation and rancidity.
HAIR WAVING OR STRAIGHTENING: Modifying the chemical structure of the hair, allowing it to be set in the style required (permanent waves or hair straightening).
PRESERVATIVE: Exclusively or mainly intended to inhibit the development of micro-organisms in the cosmetic product. All authorised preservatives are substances in the positive list of Annex V to the Cosmetics Regulation 1223/2009.
REDUCING: Changing the chemical nature of another ingredient by adding hydrogen (or removing oxygen).

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#27040 · SODIUM SULFITE

The 5 markets that hold a rule for this substance do not classify it the same way.

restricted: European Union South Korea
permitted on a positive list: Great Britain New Zealand ASEAN

See every substance the markets disagree about

Ingredients with overlapping formulation functions

SODIUM HYDROSULFITEREDUCING, VISCOSITY CONTROLLING

SODIUM HYDROXYMETHANE SULFONATEANTIMICROBIAL, REDUCING

SODIUM METABISULFITEANTIOXIDANT, PRESERVATIVE, REDUCING

SODIUM OXYMETHYLENE SULFOXYLATEREDUCING

SODIUM THIOGLYCOLATEANTIOXIDANT, DEPILATORY, HAIR WAVING OR STRAIGHTENING, REDUCING

SODIUM THIOSULFATEREDUCING

SODIUM TOCOPHERYL PHOSPHATEANTIOXIDANT, EMULSION STABILISING, REDUCING, SKIN CONDITIONING, SURFACTANT - CLEANSING, SURFACTANT …

SR-(METHIONYL R-GREEN MUSSEL OLIGOPEPTIDE-1)ANTIOXIDANT; HAIR CONDITIONING; HUMECTANT; REDUCING; SKIN CONDITIONING - HUMECTANT

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal

How SODIUM SULFITE appears in the CosIng inventory

The CosIng inventory lists SODIUM SULFITE as a cosmetic ingredient and this page links it to 2 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

SODIUM SULFITE is also tagged with 4 cosmetic functions in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

SODIUM SULFITE appears in the EU CosIng inventory and has linked annex records. Check the annex records above for applicable restrictions, concentration limits and conditions of use. Annex II listing means prohibited; Annex III means restricted; Annexes IV, V and VI mean permitted under specified conditions.

The restriction field for SODIUM SULFITE reads: "III/99 V/9". This is the restriction note recorded in the CosIng inventory for this ingredient. For authoritative conditions and limits, always refer to the linked annex entries above.

According to the EU CosIng inventory, SODIUM SULFITE carries the following function designation(s):

CAS 7757-83-7 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

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Use the INCI Checker to screen a full ingredient list across selected markets, or compare this substance across all supported market datasets.

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Source note for SODIUM SULFITE

This page combines the CosIng inventory entry for SODIUM SULFITE with 2 linked Annex II–VI records from the local dataset built from public European Commission cosmetic ingredient materials.

Use this inventory page to research SODIUM SULFITE and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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Tools & next steps

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