Is SODIUM ESYLATE safe to use in EU cosmetics?

SODIUM ESYLATE is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Always verify against the current official CosIng database before formulating.

What other records share CAS 5324-47-0?

CAS 5324-47-0 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.

How do I check if my formula contains SODIUM ESYLATE?

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 8740515/10/2010

SODIUM ESYLATE

Ethanesulfonic Acid, Sodium Salt (1:1)

SODIUM ESYLATE 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 5324-47-0

CAS 5324-47-0PubChem CID 4192170

Sodium ethanesulphonate

IUPAC name: sodium ethanesulfonate

Molecular formula: C2H5NaO3S
Molecular weight: 132.12 g/mol
Exact mass: 131.98570947 Da
Topological polar surface area: 65.6 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 3
Covalent units: 2
Defined stereocentres: 0

Also known as

EINECS 226-194-9NSC 2695RefChem:183879226-194-9sodium;ethanesulfonateEthanesulfonic Acid Sodium SaltETHANESULFONIC ACID, SODIUM SALTethane sulfonic acid sodium salt

8 more reported names

sodium ethane sulfonateC2H5NaO3SEthylsulfonic Acid Sodium SaltKQFAFFYKLIBKDE-UHFFFAOYSA-MAS-57759CS-0206836E0256Ethanesulfonic acid sodium salt, 98%, may cont. ca 2% water

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

EPA DTXSID:DTXSID20201335

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 ESYLATE

INCI name

SODIUM ESYLATE

Description

Ethanesulfonic Acid, Sodium Salt (1:1)

Record provenance

Inventory reference: 87405
Imported identity: SODIUM ESYLATE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for SODIUM ESYLATE

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Key data

CAS

5324-47-0

226-194-9

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.

Official EU ingredient-name evidence

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

#26607 · SODIUM ESYLATE

Ingredients with overlapping formulation functions

SODIUM CALCIUM COPPER PHOSPHATEABRASIVE, BUFFERING

SODIUM CALCIUM ZINC PHOSPHATEABRASIVE, BUFFERING, NAIL CONDITIONING, SKIN CONDITIONING, UV ABSORBER

SODIUM CARBONATEBUFFERING, BULKING

SODIUM CITRATEBUFFERING, CHELATING, FRAGRANCE

SODIUM FUMARATEBUFFERING

SODIUM GLYCOLATEBUFFERING

SODIUM HUMATEABSORBENT, ANTIMICROBIAL, BUFFERING, CHELATING

SODIUM HYDROXIDEBUFFERING, DENATURANT

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 ESYLATE appears in the CosIng inventory

The CosIng inventory lists SODIUM ESYLATE 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 ESYLATE 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

SODIUM ESYLATE 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 ESYLATE carries the following function designation(s):

BUFFERING

CAS 5324-47-0 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 ESYLATE

This page reproduces the CosIng inventory entry for SODIUM ESYLATE 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 ESYLATE 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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