C22H14O9
422.3 g/mol
Dye & PigmentWarning
Aurintricarboxylic acid
CAS4431-00-9EC224-628-1
Category
Dye & Pigment
Compound Class
Organic Acid
Primary Use
Histological dye and aluminum detection reagent
Aurintricarboxylic acid is a member of the quinomethane class and functions as a histological dye and a reagent for the colorimetric detection of aluminum. Its triammonium salt, known as 'aluminon', is commonly used for estimating aluminum in water, foods, and tissues.
Histological dyeColorimetric reagent for aluminum detection
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
ReferenceSame Category
Butanamide, N-[4-(acetylamino)phenyl]-3-oxo-
CAS4433-78-7
dye intermediate
ReferenceSame Category
4'-chloro-2',5'-dimethoxyacetoacetanilide
CAS4433-79-8
Pigment intermediate
ReferenceSame Category
Basic orange 1
CAS4438-16-8
Basic dye for textiles
ReferenceSame Category
2-Amino-5-chlorobenzotrifluoride
CAS445-03-4
Diazo component for azoic dyes
Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for Aurintricarboxylic acid (CAS 4431-00-9) is 2918.99.
HS code (international, 6-digit)
2918.99
EU CN code (8-digit)
2918 99 90
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
5-[(3-carboxy-4-hydroxyphenyl)-(3-carboxy-4-oxocyclohexa-2,5-dien-1-ylidene)methyl]-2-hydroxybenzoic acid
InChIKey
GIXWDMTZECRIJT-UHFFFAOYSA-N
SMILES
C1=CC(=C(C=C1C(=C2C=CC(=O)C(=C2)C(=O)O)C3=CC(=C(C=C3)O)C(=O)O)C(=O)O)O
Synonyms (23)
- Acid, Aurintricarboxylic
- Aluminon free acid
- Aurintricarboxylicacid(ATA)
- Dupont ATA
- Dupont DA 639 (SD-095345)
- aurine tricarboxylic acid
- aurintricarboxylic acid
- chrome violet CG free acid
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