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CAS 2 records

CAS 1934-21-0

CAS 1934-21-0 matches 2 EU annex records across Annex II–VI of Regulation 1223/2009.

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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
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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.

Records for CAS 1934-21-0

2 total
No records found for this CAS number.

How CAS 1934-21-0 is used on this site

CAS 1934-21-0 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 2 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 1934-21-0 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.