Skip to main content
CosIng Checker
CosIng Checker
EU cosmetic ingredients, restrictions and safety
Login
InventoryRef 3163713/08/2020

ACID YELLOW 23

Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-(4-sulphophenylazo)pyrazole-3-carboxylate (CI 19140)

ACID YELLOW 23 is linked to 2 EU annex records on this page. Inventory note: III/189 IV/44.

INCI CheckerCompare all markets Search similar

Regulatory evidence by market

This matrix separates verified ingredient rules from sources that are mapped but not yet imported. No imported rule does not mean the ingredient is permitted.

Compare markets

Swipe or scroll horizontally to see every column.

MarketEvidence statusRecordsSource language
European UnionEvidence linked
Restricted entry found
Open this evidence		2English and EU languages
Great BritainSource mapped
Official source mapped; ingredient rule not imported
0English
CanadaSource mapped
Official source mapped; ingredient rule not imported
0English and French
New ZealandSource mapped
Official source mapped; ingredient rule not imported
0English
ASEANSource mapped
Official source mapped; ingredient rule not imported
0English and national languages
ChinaSource mapped
Official source mapped; ingredient rule not imported
0Chinese with selected English material
JapanSource mapped
Official source mapped; ingredient rule not imported
0Japanese; official English translation available
South KoreaSource mapped
Official source mapped; ingredient rule not imported
0Korean with some English names
United StatesSource mapped
Official source mapped; ingredient rule not imported
0English
AustraliaSource mapped
Official source mapped; ingredient rule not imported
0English
BrazilSource mapped
Official source mapped; ingredient rule not imported
0Portuguese with INCI crosswalks
IndiaSource mapped
Official source mapped; ingredient rule not imported
0English and Hindi
Saudi ArabiaSource mapped
Official source mapped; ingredient rule not imported
0Arabic and English

Chemical identity and properties

PubChem 2D chemical structure for CAS 1934-21-0
CAS 1934-21-0PubChem CID 164825

Tartrazine

Tartrazine is an organic sodium salt which is the trisodium salt of tartrazine acid. A synthetic lemon yellow azo dye used as a food colouring. It has a role as a histological dye and a food colouring. It contains a tartrazine(3-). — ChEBI

IUPAC name
trisodium;5-oxo-1-(4-sulfonatophenyl)-4-[(4-sulfonatophenyl)diazenyl]-4H-pyrazole-3-carboxylate
Molecular formula
C16H9N4Na3O9S2
Molecular weight
534.4 g/mol
Exact mass
533.95040307 Da
Topological polar surface area
229.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
12
Covalent units
4
Defined stereocentres
0

Also known as

Yellow 5Food Yellow 4Aizen tartrazineTartraphenineTartran YellowAmacid Yellow TCilefa Yellow T1342-47-8
16 more reported names
FD&C Yellow No. 5A.F. Yellow No. 4FD & C Yellow no. 5C.I. 19140Tartrazine FD&C Yellow #5Atul TartrazineErio TartrazineKako TartrazineTartrazine LakeTartrazine BTartrazine CTartrazine GTartrazine MTartrazine NTartrazine OTartrazine T
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for ACID YELLOW 23

INCI name

ACID YELLOW 23

Description

Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-(4-sulphophenylazo)pyrazole-3-carboxylate (CI 19140)

Record provenance

Inventory reference
31637
Imported identity
ACID YELLOW 23
Source update
13/08/2020
European Commission CosIng source notes
Annex IV Restriction reference
Entry 44

CI 19140

CAS: 12225-21-7; 1934-21-0
EC: 235-428-9; 217-699-5

Key data

CAS
1934-21-0
EC
217-699-5
Restriction
III/189 IV/44
Function
HAIR DYEING
Imparting color to hair. Hair dyeing preparations may be temporary, semi-permanent, or permanent, depending on the length of time the colorant remains on the hair.

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#879 · ACID YELLOW 23

Records sharing a CAS or EC identity

CI 19140

Ingredients with overlapping formulation functions

ACID RED 95HAIR DYEING
ACID VIOLET 43HAIR DYEING
ACID VIOLET 9HAIR DYEING
ACID YELLOW 1HAIR DYEING
ACID YELLOW 23 ALUMINUM LAKEHAIR DYEING
ACID YELLOW 36HAIR DYEING
ACID YELLOW 73COLORANT, HAIR DYEING
ACID YELLOW 73 SODIUM SALTHAIR DYEING

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicalsPubChem PUG RESTEU Safety Gate cosmetic product alertsECHA CHEMUS EPA CompToxCosmetic Ingredient Review safety assessmentsFDA Global Substance Registration SystemILO/WHO International Chemical Safety CardsJapan NITE-CHRIPNIOSH Pocket Guide to Chemical HazardsOECD eChemPortal

How ACID YELLOW 23 appears in the CosIng inventory

The CosIng inventory lists ACID YELLOW 23 as a cosmetic ingredient and this page links it to 2 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

ACID YELLOW 23 is also tagged with 1 cosmetic function in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

ACID YELLOW 23 appears in the EU CosIng inventory and has linked annex records. Check the annex records above for applicable restrictions, concentration limits and conditions of use. Annex II listing means prohibited; Annex III means restricted; Annexes IV, V and VI mean permitted under specified conditions.

The restriction field for ACID YELLOW 23 reads: "III/189 IV/44". This is the restriction note recorded in the CosIng inventory for this ingredient. For authoritative conditions and limits, always refer to the linked annex entries above.

According to the EU CosIng inventory, ACID YELLOW 23 carries the following function designation(s):

CAS 1934-21-0 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.
View CAS records

Use the INCI Checker to screen a full ingredient list across selected markets, or compare this substance across all supported market datasets.
Open INCI Checker

Source note for ACID YELLOW 23

This page combines the CosIng inventory entry for ACID YELLOW 23 with 2 linked Annex II–VI records from the local dataset built from public European Commission cosmetic ingredient materials.

Use this inventory page to research ACID YELLOW 23 and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

View sourcesView updates

Tools & next steps

Check your formula

Scan a full INCI list to detect ACID YELLOW 23 and any linked EU annex restrictions or allergen flags.

INCI Checker

Search similar ingredients

Find other inventory ingredients and annex entries related to ACID YELLOW 23, its identifiers or nearby name variants.

Search