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  • industrial

Sodium pyrithione

CAS 116503-44-7

Also registered as 2 other CAS numbers

122333-48-6 · 15922-78-8

Concern score

Not assessed — no hazard data yet.

Sodium pyrithione in plain language

What it is

Also known as Sodium 2-sulfanylidenepyridin-1(2H)-olate · 1-Hydroxy-2(1H)-Pyridinethione, Sodium Salt · 1-Hydroxy-2(1H)-pyridinethionato sodium · 1-Oxo-2-Pyridinethiol Sodium Salt · 2(1H)-Pyridinethione, 1-hydroxy-, sodium salt (1:1) · Caswell No. 790A

Show all 11 names

Omadine-sodium · Sodium salt of 1-HYDROXY 2(1H)-PYRIDINE thione · Sodium 1-hydroxypyridine-2-thione · sodium 2-pyridinethiol-1-oxide · sodium pyridinethione

What it does

Used in cosmetics as a preservative.

  • Preservative
  • Antimicrobial
Is it a concern?
We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.

Regulation

No restrictions found. Sodium pyrithione appears in these published regulatory listings.

Recorded in these product areas

  • Found in consumer products
  • Beauty
  • Industrial
  • EUCosIngActiveRestriction: II/369
  • USEPAcommercial use observedEPA CPDat observed this chemical in 8 composition records across product categories including Home maintenance, Industrial products, Personal care. EPA CPDat classifies this chemical for functional uses including Preservative, Biocide.
    • EPA CPDat observed this chemical in 8 composition records across product categories including Home maintenance, Industrial products, Personal care. EPA CPDat classifies this chemical for functional uses including Preservative, Biocide.Source →

Expert safety opinions

No expert opinion on file for Sodium pyrithione. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.

  • SCCS

    EU Scientific Committee on Consumer Safety

    No SCCS opinion on file.

  • CIR

    Cosmetic Ingredient Review (US expert panel)

    No CIR safety assessment on file.

Evidence & sources

No graded research studies for Sodium pyrithione yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

3 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →

  • EPA Chemical and Products Database

    exposure · updated 2021-06-08

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Food use

Nothing to weigh for this context yet.

No signal in this context

We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.

Fragrance avoidance

Nothing to weigh for this context yet.

No signal in this context

We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.

Where it has been recorded

How often EPA CPDat has listed Sodium pyrithione in a product composition. These are source records, not Greenveil catalog products.

Source records

8

Named organisations

6

Home maintenanceIndustrial productsPersonal care

Typical roles

PreservativeAntimicrobial
See products using Sodium pyrithione →

Catalog

Found in these products

Cosmetic and personal-care products that list Sodium pyrithione are shown first. Their ingredient lists include Sodium pyrithione; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 20 →Find products without it →