Food use
Food-use source coverage is present in the current record.
The ingredient appears in food-oriented source coverage or allowed-use references, which makes food use easier to support than a context with no domain signal at all.
- beauty
- industrial
Pigment red 172 aluminum lake
CAS 15790-05-3 · 20/100 · High conf.
Also registered as 7 other CAS numbers
39290-73-8 · 53026-61-2 · 78729-86-9 · 157367-40-3 · 1342-25-2 · 12227-78-0 · 16423-68-0
Concern score
20/100Minor concern based on regulatory listings.
High confidence
Pigment red 172 aluminum lake in plain language
On cosmetic ingredient lists it appears as “Acid red 51”.
Also known as Acid red 51 · CI 45430 · FD&C red no. 3 aluminum lake · Tetraiodofluorescein aluminum · 11150 dispersed pink · Acid red 51:1
Show all 15 names
C.I. acid red 51:1 · C.I. food red 14:1 · C.I. pigment red 172 · Erythrosine aluminum lake · Pigment red 172 · Solvent Red 140 Aluminum Lake · C.I. 45430:1 · FD&C red no. 3, aluminum lake--delisted · erythrosine
Used in cosmetics as a colourant and a hair dye. Acid Red 51 is classed chemically as a xanthene colour.
- Colorant
- Hair dyeing
- Colourant
- Minor concern: no hazard classifications on record. It is listed for cosmetic use in the EU.
What the listings say
Permitted, with conditions — Pigment red 172 aluminum lake appears on published "allowed" regulatory lists rather than on a restriction list.
Disodium 2-(2,4,5,7-tetraiodo-6-oxido-3-oxoxanthen-9-yl)benzoate and its insoluble barium, strontium and zirconium lakes, salts and pigments is listed in Annex IV of the EU Cosmetics Regulation (EC) 1223/2009 (colorants allowed in cosmetic products).
The score describes this ingredient's chemical identity — its hazard profile from published classifications and regulatory status — not the safety of any product it appears in.
Regulation
No restrictions found. Pigment red 172 aluminum lake appears in these published regulatory listings.
- EU Annex IV — permitted colorant
- EU permitted colorant
- Found in consumer products
- Industrial
EUCosIngActive4 entries
- Cosmetics Regulation annex IV / ref 80.Source →
- Acid Red 51 is classed chemically as a xanthene colour. It conforms to the formula: Restriction: II/1337 (when used as a substance in hair dye products)Source →
- CI 45430 is classed chemically as a xanthene colour. It conforms to the formula: Restriction: IV/80 (CI 45430) II/1337 (Acid Red 51; CI 45430) and its aluminium salt (Pigment Red 172 Aluminium lake) when used as a substance in hair dye productsSource →
- Pigment Red 172 Aluminum Lake is an insoluble pigment composed of the aluminum salt of Acid Red 51 extended on an appropriate substrate. It conforms to the formula: Restriction: II/1337 (when used as a substance in hair dye products)Source →
EUECallowed_listedAnnex IV of EU Cosmetics Regulation (EC) 1223/2009: colorants allowed in cosmetic products. Conditions of use and warnings: Purity criteria as set out in Commission Directive 95/45/EC (E 127)
- Annex IV of EU Cosmetics Regulation (EC) 1223/2009: colorants allowed in cosmetic products. Conditions of use and warnings: Purity criteria as set out in Commission Directive 95/45/EC (E 127)Source →
USEPAcommercial use observedEPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Dye.
- EPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Dye.Source →
USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
- openFDA substance registry classifies this ingredient as chemical.Source →
Expert safety opinions
No expert opinion on file for Pigment red 172 aluminum lake. 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 Pigment red 172 aluminum lake 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
- Open →
EU CosIng Cosmetics Regulation Annexes
regulatory · updated 2020-08-14
- Open →
EPA Chemical and Products Database
exposure · updated February 8, 2019
- Open →
EPA DSSTox Identifiers
chemistry · updated 2025-12-29
- Open →
FDA GSRS UNII
registry · updated 2026-02-26
- Open →
openFDA Substance
registry · updated 2026-05-24
- Open →
PubChem Live Enrichment
chemistry · updated 2026-05-17
Suitability
Context-specific fit derived from published classifications and the current ingredient evidence profile.
Good fit
Fragrance avoidance
No fragrance-linked caution surfaced in the current profile.
This ingredient does not currently read as a fragrance-linked driver in the published evidence and hazard profile.
Where it has been recorded
How often EPA CPDat has listed Pigment red 172 aluminum lake in a product composition. These are source records, not Greenveil catalog products.
Named organisations
2
Typical roles
ColorantHair dyeingColourant
Found in these products
Cosmetic and personal-care products that list Pigment red 172 aluminum lake are shown first. Their ingredient lists include Pigment red 172 aluminum lake; each product's own rating depends on its whole formula, so it is shown on the product page, not here.
- dentifrice liquideCarrefour · Hygiene
- Gel para depilar con cuchilla piel sensibleDeliplus
- LRO Lotion Rose OriginaleDéesse
- Tonipharm Alodont Crème Fixative Appareil Dentaire 50 G
- denture cleansing tabletsCleansing Tablets
- perfume BOOS
- Sorriso Fresh Gel Menthol ImpactColgate, Sorriso · Hygiene
- Dentifricio sensitive con Coenzima Q₁₀ e AllantoinaGengimed system · Hygiene
- Corega Protesemiddel Ultra Cream 40gGLAXOSMITHKLINE CONSUMER HEALTHCARE
- color rightwilton
