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GREENVEIL

  • beauty

Acid yellow 23

CAS 1934-21-0

Concern score

Not assessed — no hazard data yet.

Acid yellow 23 in plain language

What it is

On cosmetic ingredient lists it appears as “CI 19140”.

Also known as CI 19140

What it does

Used in cosmetics as a colourant and a hair dye. Acid Yellow 23 is classed chemically as a pyrazole colour.

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

What we know about this ingredient

Canonical ingredient record built from 2 public-source records.

Regulation

No restrictions found. Acid yellow 23 appears in these published regulatory listings.

  • EUCosIngActive2 entries
    • Acid Yellow 23 is classed chemically as a pyrazole colour. It conforms to the formula: Restriction: III/189 IV/44Source →
    • CI 19140 is classed chemically as a pyrazole colour. It conforms to the formula: Restriction: IV/44 (CI 19140) III/189 (Acid Yellow 23; Acid Yellow 23 Aluminum lake)Source →

Expert safety opinions

No expert opinion on file for Acid yellow 23. 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 Acid yellow 23 yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

1 data source

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    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.

Catalog

Found in these products

Cosmetic and personal-care products that list Acid yellow 23 are shown first. Their ingredient lists include Acid yellow 23; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

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