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1-Hexadecylpyridin-1-ium chloride--water (1/1/1)

CAS 2624170-48-3

Also registered as 2 other CAS numbers

123-03-5 · 6004-24-6

Concern score

Not assessed — no hazard data yet.

1-Hexadecylpyridin-1-ium chloride--water (1/1/1) in plain language

What it is

On cosmetic ingredient lists it appears as “Cetylpyridinium chloride”.

Also known as Cetylpyridinium chloride · 1-Hexadecylpyridinium chloride · Pyridinium, 1-hexadecyl-, chloride, hydrate (1:1:1) · cetylpyridinii chloridum · cetylpyridinium chloride monohydrate · cetylpyridinum chloride monohydrate

Show all 7 names

quaternary ammonium salt

What it does

Used in cosmetics as an antimicrobial, a deodorant and an oral-care ingredient. Cetylpyridinium Chloride is a quaternary ammonium salt.

  • Antimicrobial
  • Deodorant
  • Oral care
  • Antistatic
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. 1-Hexadecylpyridin-1-ium chloride--water (1/1/1) appears in these published regulatory listings.

Recorded in these product areas

  • Found in consumer products
  • Beauty
  • Industrial
  • EUCosIngActiveCetylpyridinium Chloride is a quaternary ammonium salt that conforms generally to the formula
    • Cetylpyridinium Chloride is a quaternary ammonium salt that conforms generally to the formulaSource →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 7 composition records across product categories including Personal care, Laboratory supplies, Electronics/small appliances.
    • EPA CPDat observed this chemical in 7 composition records across product categories including Personal care, Laboratory supplies, Electronics/small appliances.Source →

Expert safety opinions

No expert opinion on file for 1-Hexadecylpyridin-1-ium chloride--water (1/1/1). 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 1-Hexadecylpyridin-1-ium chloride--water (1/1/1) 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 4 December 2007

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

Suitability

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

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 1-Hexadecylpyridin-1-ium chloride--water (1/1/1) in a product composition. These are source records, not Greenveil catalog products.

Source records

7

Named organisations

1

Personal careLaboratory suppliesElectronics/small appliances

Typical roles

AntimicrobialDeodorantOral careAntistatic
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Catalog

Found in these products

Cosmetic and personal-care products that list 1-Hexadecylpyridin-1-ium chloride--water (1/1/1) are shown first. Their ingredient lists include 1-Hexadecylpyridin-1-ium chloride--water (1/1/1); each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 145 →Find products without it →