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CAS 17636-10-1 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 9861212/10/2020

SODIUM 3-MERCAPTOPROPANE SULFONATE

Sodium 3-Mercaptopropane Sulfonate

SODIUM 3-MERCAPTOPROPANE SULFONATE 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 17636-10-1

CAS 17636-10-1PubChem CID 23672317

1-Propanesulfonic acid, 3-mercapto-, sodium salt (1:1)

IUPAC name: sodium 3-sulfanylpropane-1-sulfonate

Molecular formula: C3H7NaO3S2
Molecular weight: 178.2 g/mol
Exact mass: 177.97343071 Da
Topological polar surface area: 66.6 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 4
Covalent units: 2
Defined stereocentres: 0

Also known as

Sodium 3-mercaptopropanesulphonateSodium 3-mercapto-1-propanesulfonate3-Mercapto-1-propanesulfonic acid sodium salt1-Propanesulfonic acid, 3-mercapto-, monosodium saltSodium 3-mercaptopropylsulfonateSodium 3-mercaptopropanesulfonateAsta 7100Sodium gamma-mercaptopropanesulfonate

16 more reported names

EINECS 241-620-3EC 241-620-31-Propanesulfonic acid, 3-mercapto-, sodium saltRefChem:436187241-620-3sodium 3-mercaptopropane-1-sulfonatesodium;3-sulfanylpropane-1-sulfonateS8NUH5URK8Sodium 3-?Mercapto-?1-?propanesulfonate (>90%)C3H7NaO3S2Sodium3-mercaptopropanesulphonateUNII-S8NUH5URK8FRTIVUOKBXDGPD-UHFFFAOYSA-MCS-W017331AC-32134AS-92447

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External database identifiers

EPA DTXSID:DTXSID6066232

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 3-MERCAPTOPROPANE SULFONATE

INCI name

SODIUM 3-MERCAPTOPROPANE SULFONATE

Description

Sodium 3-Mercaptopropane Sulfonate

Record provenance

Inventory reference: 98612
Imported identity: SODIUM 3-MERCAPTOPROPANE SULFONATE
Source update: 12/10/2020

European Commission CosIng source notes

Annex records for SODIUM 3-MERCAPTOPROPANE SULFONATE

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Key data

CAS

17636-10-1

241-620-3

Restriction

—

Function

DENATURANT: Rendering cosmetics unpalatable. Mostly added to cosmetics containing ethyl alcohol to make it unsuitable for ingestion.
HAIR CONDITIONING: Enhancing the appearance and feel of hair. Leaving the hair easy to comb, supple, soft and shiny and/or imparting volume, lightness, gloss, texture, etc.
pH ADJUSTERS: Controlling the pH of cosmetic products.
SURFACE MODIFIER: Applied to other cosmetic components to make them more hydrophilic or hydrophobic, or to modify their physical/chemical properties.

Official EU ingredient-name evidence

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

#26227 · SODIUM 3-MERCAPTOPROPANE SULFONATE

Ingredients with overlapping formulation functions

FORMIC ACIDFRAGRANCE, pH ADJUSTERS, PRESERVATIVE

NICKEL CHLORIDEpH ADJUSTERS

PROPIONIC ACIDANTIMICROBIAL, FRAGRANCE, pH ADJUSTERS, PRESERVATIVE

S-DNA APTAMER-2ANTIOXIDANT; REDUCING; SKIN PROTECTING; UV FILTER; pH ADJUSTERS

SODIUM ANISATEANTIMICROBIAL, FLAVOURING, FRAGRANCE, pH ADJUSTERS

TRIFLUOROACETIC ACIDpH ADJUSTERS

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 3-MERCAPTOPROPANE SULFONATE appears in the CosIng inventory

The CosIng inventory lists SODIUM 3-MERCAPTOPROPANE SULFONATE 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 3-MERCAPTOPROPANE SULFONATE 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 3-MERCAPTOPROPANE SULFONATE 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 3-MERCAPTOPROPANE SULFONATE carries the following function designation(s):

CAS 17636-10-1 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 3-MERCAPTOPROPANE SULFONATE

This page reproduces the CosIng inventory entry for SODIUM 3-MERCAPTOPROPANE SULFONATE 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 3-MERCAPTOPROPANE SULFONATE 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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