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CAS 533-96-0 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.

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InventoryRef 3805515/10/2010

SODIUM SESQUICARBONATE

Trisodium hydrogendicarbonate

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

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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.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 533-96-0

CAS 533-96-0PubChem CID 10791

Sodium Sesquicarbonate

Trona is a mineral with formula of Na3(HCO3)(CO3)·2H2O. The IMA symbol is Tn. — RRUFF Project

IUPAC name: trisodium;hydrogen carbonate;carbonate

Molecular formula: C2HNa3O6
Molecular weight: 189.99 g/mol
Exact mass: 189.94662059 Da
Topological polar surface area: 124.0 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 6
Covalent units: 5
Defined stereocentres: 0

Also known as

Magadi sodaSnowflake crystalsUraoTrisodium hydrogendicarbonateSodium carbonate (3:2)Carbonic acid, sodium salt (2:3)SQ 810SESQUI TM

16 more reported names

Y1X815621JSOLVAY T 200SOLVAY T-200INS NO.500(III)INS-500(III)E-500(III)SODIUM MONOHYDROGENDICARBONATESQ-810RefChem:887871208-580-9TronaSnowfineCarbicarbHSDB 769EINECS 208-580-9tron a

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External database identifiers

EPA DTXSID:DTXSID6049646

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 SESQUICARBONATE

INCI name

SODIUM SESQUICARBONATE

Description

Trisodium hydrogendicarbonate

Record provenance

Inventory reference: 38055
Imported identity: SODIUM SESQUICARBONATE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for SODIUM SESQUICARBONATE

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Key data

CAS

533-96-0

208-580-9

Restriction

—

Function

BUFFERING: Stabilising the pH of an aqueous medium in a narrow range even if an acid or base is added. Altering and/or maintaining a cosmetic product's pH at the desired level.
BULKING: Non-reactive (chemically inert), solid ingredients that dilute other solids and/or increase the volume of cosmetic products.
CLEANSING: Helping to keep the body surface clean.

Official EU ingredient-name evidence

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

#26982 · SODIUM SESQUICARBONATE

Ingredients with overlapping formulation functions

SODIUM CHLORIDEBULKING, FRAGRANCE, ORAL CARE, VISCOSITY CONTROLLING

SODIUM HYDROXYPROPYL STARCH PHOSPHATEABRASIVE, BULKING, VISCOSITY CONTROLLING

SODIUM MAGNESIUM SILICATEBINDING, BULKING, VISCOSITY CONTROLLING

SODIUM POTASSIUM ALUMINUM SILICATEBULKING

SODIUM SILICOALUMINATEABRASIVE, BULKING, VISCOSITY CONTROLLING

SODIUM STEARYL FUMARATEBULKING

SODIUM SULFATEBULKING, VISCOSITY CONTROLLING

SODIUM/ALUMINUM HYDROXIDE/OXALATE/SULFATEABRASIVE, ABSORBENT, BULKING, DEODORANT, HUMECTANT, OPACIFYING

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 SESQUICARBONATE appears in the CosIng inventory

The CosIng inventory lists SODIUM SESQUICARBONATE 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 SESQUICARBONATE is also tagged with 3 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 SESQUICARBONATE 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 SESQUICARBONATE carries the following function designation(s):

CAS 533-96-0 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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Source note for SODIUM SESQUICARBONATE

This page reproduces the CosIng inventory entry for SODIUM SESQUICARBONATE 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 SESQUICARBONATE 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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