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CAS 15421-15-5 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 8376015/10/2010

POTASSIUM ASCORBATE

Potassium L-ascorbate

POTASSIUM ASCORBATE 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 15421-15-5

CAS 15421-15-5PubChem CID 23687519

Potassium ascorbate

IUPAC name: potassium (2R)-2-[(1S)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2H-furan-3-olate

Molecular formula: C6H7KO6
Molecular weight: 214.21 g/mol
Exact mass: 213.98796942 Da
Topological polar surface area: 110.0 Å²
Hydrogen-bond donors: 3
Hydrogen-bond acceptors: 6
Covalent units: 2
Defined stereocentres: 2

Also known as

Potassium L-ascorbateMonopotassium ascorbateEINECS 239-432-1UNII-X5523762RIPOTASSIUM ASCORBATE [WHO-DD]E-303POTASSIUM (2R)-2-((1S)-1,2-DIHYDROXYETHYL)-4-HYDROXY-5-OXO-2H-FURAN-3-OLATERefChem:175413

9 more reported names

POTASSIUM ASCORBATE [INCI]239-432-1Potassium (R)-2-((S)-1,2-dihydroxyethyl)-4-hydroxy-5-oxo-2,5-dihydrofuran-3-olatepotassium;(2R)-2-[(1S)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2H-furan-3-olatepotassium (2R)-2-[(1S)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2,5-dihydrofuran-3-olate3-O-Potassio-L-ascorbic acidEBC-55032E303EN300-221654

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External database identifiers

EPA DTXSID:DTXSID80165560

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 POTASSIUM ASCORBATE

INCI name

POTASSIUM ASCORBATE

Description

Potassium L-ascorbate

Record provenance

Inventory reference: 83760
Imported identity: POTASSIUM ASCORBATE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for POTASSIUM ASCORBATE

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Key data

CAS

15421-15-5

239-432-1

Restriction

—

Function

ANTIOXIDANT: Inhibiting reactions promoted by oxygen, thus avoiding oxidation and rancidity.

Official EU ingredient-name evidence

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

#22550 · POTASSIUM ASCORBATE

Ingredients with overlapping formulation functions

PORTULACA MOLOKINIENSIS CALLUS EXTRACTANTIOXIDANT, HUMECTANT, SKIN CONDITIONING

PORTULACA MOLOKINIENSIS EXTRACTANTIOXIDANT, HUMECTANT, SKIN CONDITIONING

PORTULACA OLERACEA FLOWER/LEAF/STEM EXTRACTANTIOXIDANT, SKIN CONDITIONING

POSIDONIA OCEANICA EXTRACTANTIOXIDANT, BLEACHING, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

POTASSIUM ASCORBYL TOCOPHERYL PHOSPHATEANTIOXIDANT

POTASSIUM BEHENOYL HYDROXYPROLINEANTIOXIDANT, EMULSION STABILISING, SURFACTANT - EMULSIFYING

POTASSIUM COFFEEATEANTIMICROBIAL; ANTIOXIDANT; SURFACTANT - EMULSIFYING; SURFACTANT - CLEANSING; SURFACTANT

POTASSIUM EDTA-PLATINUMANTIMICROBIAL; ANTIOXIDANT; 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 POTASSIUM ASCORBATE appears in the CosIng inventory

The CosIng inventory lists POTASSIUM ASCORBATE 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.

POTASSIUM ASCORBATE is also tagged with 1 cosmetic function 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

POTASSIUM ASCORBATE 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, POTASSIUM ASCORBATE carries the following function designation(s):

ANTIOXIDANT

CAS 15421-15-5 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 POTASSIUM ASCORBATE

This page reproduces the CosIng inventory entry for POTASSIUM ASCORBATE 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 POTASSIUM ASCORBATE 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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