Skip to main content
CosIng Checker
CosIng Checker
EU cosmetic ingredients, restrictions and safety
Login
InventoryRef 3788915/10/2010

SODIUM HYDROSULFITE

Sodium dithionite

SODIUM HYDROSULFITE is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.

INCI CheckerCompare all markets Search similar

Regulatory evidence by market

No rule for this ingredient has been imported for any of the 13 markets tracked here.

That describes this inventory, not the law. No imported rule is not evidence that an ingredient is permitted: a rule may exist under another name or identifier, or in a dataset not yet imported here.

Markets and their official sourcesSearch every market for this name

Chemical identity and properties

PubChem 2D chemical structure for CAS 7775-14-6
CAS 7775-14-6PubChem CID 24489

Sodium Dithionite

Sodium dithionite is an inorganic sodium salt that is the disodium salt of dithionous acid. It has a role as a bleaching agent and a reducing agent. It contains a dithionite(2-). — ChEBI

Molecular formula
Na2O4S2
Molecular weight
174.11 g/mol
Exact mass
173.90333939 Da
Topological polar surface area
119.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
6
Covalent units
3
Defined stereocentres
0

Also known as

SODIUM HYDROSULFITESodium hydrosulphiteVatroliteSodium sulfoxylateDisodium dithioniteDithionous acid, disodium saltBlankitBurmol
16 more reported names
HydrosBlankit INV-Brite BHydrosulfite R ConcDisodium hydrosulfiteSodium hydrosulfite (Na2S2O4)Sodium dithionite (Na2(S2O4))2K5B8F6ES1CHEBI:66870RefChem:6237231-890-0Dithionite, SodiumSodium hypodisulfiteSodium Hydrosulfite, 85%sodium dithionitsodiumdithionite
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for SODIUM HYDROSULFITE

INCI name

SODIUM HYDROSULFITE

Description

Sodium dithionite

Record provenance

Inventory reference
37889
Imported identity
SODIUM HYDROSULFITE
Source update
15/10/2010
European Commission CosIng source notes
Browse

Browse EU annexes

Explore Annex II–VI to see which substances are prohibited, restricted or permitted under specific conditions.

Search

Search annex entries

Search the annex database for entries matching SODIUM HYDROSULFITE or related substances.

Key data

CAS
7775-14-6
EC
231-890-0
Restriction
—
Function
REDUCING
Changing the chemical nature of another ingredient by adding hydrogen (or removing oxygen).
VISCOSITY CONTROLLING
Increasing or decreasing the viscosity (thickness) of cosmetics.

Official EU ingredient-name evidence

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

#26673 · SODIUM HYDROSULFITE

Ingredients with overlapping formulation functions

SH-DECAPEPTIDE-7ANTIOXIDANT, BUFFERING, CHELATING, HAIR CONDITIONING, REDUCING, SKIN PROTECTING
SH-OCTAPEPTIDE-4ANTI-SEBORRHEIC, ANTIOXIDANT, CHELATING, REDUCING, SKIN PROTECTING
SODIUM BISULFITEANTIOXIDANT, HAIR WAVING OR STRAIGHTENING, PRESERVATIVE, REDUCING
SODIUM GLYOXYLATEREDUCING
SODIUM HYDROXYMETHANE SULFONATEANTIMICROBIAL, REDUCING
SODIUM METABISULFITEANTIOXIDANT, PRESERVATIVE, REDUCING
SODIUM OXYMETHYLENE SULFOXYLATEREDUCING
SODIUM SULFITEANTIOXIDANT, HAIR WAVING OR STRAIGHTENING, PRESERVATIVE, REDUCING

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 chemicalsPubChem PUG RESTEU Safety Gate cosmetic product alertsECHA CHEMUS EPA CompToxCosmetic Ingredient Review safety assessmentsFDA Global Substance Registration SystemILO/WHO International Chemical Safety CardsJapan NITE-CHRIPNIOSH Pocket Guide to Chemical HazardsOECD eChemPortal

How SODIUM HYDROSULFITE appears in the CosIng inventory

The CosIng inventory lists SODIUM HYDROSULFITE as a cosmetic ingredient and this page links it to 0 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 HYDROSULFITE is also tagged with 2 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 HYDROSULFITE is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Absence of an annex link does not guarantee unrestricted use — always verify against the current official CosIng database before formulating.

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

CAS 7775-14-6 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.
View CAS records

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

Source note for SODIUM HYDROSULFITE

This page reproduces the CosIng inventory entry for SODIUM HYDROSULFITE from public European Commission cosmetic ingredient materials and shows linked identifiers even when no direct annex match is currently attached.

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

View sourcesView updates

Tools & next steps

Check your formula

Scan a full INCI list to detect SODIUM HYDROSULFITE and any linked EU annex restrictions or allergen flags.

INCI Checker

Search similar ingredients

Find other inventory ingredients and annex entries related to SODIUM HYDROSULFITE, its identifiers or nearby name variants.

Search