Fragrance avoidance
Nothing to weigh for this context yet.
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.
- beauty
Acid yellow 73
CAS 2321-07-5
Concern score
Not assessed — no hazard data yet.
Acid yellow 73 in plain language
Used in cosmetics as a colourant and a hair dye. Acid Yellow 73 is classed chemically as a fluoran colour.
- Colorant
- Hair dyeing
- 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 1 public-source records.
Regulation
No restrictions found. Acid yellow 73 appears in these published regulatory listings.
EUCosIngActiveAcid Yellow 73 is classed chemically as a fluoran colour. It conforms to the formula: Restriction: II/1332 (when used as a substance in hair dye products)
- Acid Yellow 73 is classed chemically as a fluoran colour. It conforms to the formula: Restriction: II/1332 (when used as a substance in hair dye products)Source →
Expert safety opinions
No expert opinion on file for Acid yellow 73. 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 73 yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.
Where this comes from
- Open →
CosIng
regulatory · updated 2026-09-23
Suitability
Context-specific fit derived from published classifications and the current ingredient evidence profile.
No signal in this context