C20H17N3Na2O11S3
617.5 g/mol
Dye & PigmentDanger
2-Naphthalenesulfonic acid, 7-(acetylamino)-4-hydroxy-3-((4-((2-(sulfooxy)ethyl)sulfonyl)phenyl)azo)-, sodium salt
CAS71902-15-3EC287-574-8
Category
Dye & Pigment
Compound Class
Aromatic
Primary Use
reactive dye for textile coloring
This compound is a reactive dye used primarily for coloring textiles. It contains an azo chromophore and sulfonate groups that enable covalent bonding with cellulose fibers, providing wash-fast colors.
reactive dye for textile coloring
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
StrongStructure SimilarSimilarity 0.86
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Synthetic red azo dye
Safety Reference
Danger
H317May cause an allergic skin reaction
H318Causes serious eye damage
Customs Tariff Classification
The international HS code for 2-Naphthalenesulfonic acid, 7-(acetylamino)-4-hydroxy-3-((4-((2-(sulfooxy)ethyl)sulfonyl)phenyl)azo)-, sodium salt (CAS 71902-15-3) is 3204.16.
HS code (international, 6-digit)
3204.16
EU CN code (8-digit)
3204 16 00
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
disodium;7-acetamido-4-hydroxy-3-[[4-(2-sulfonatooxyethylsulfonyl)phenyl]diazenyl]naphthalene-2-sulfonate
InChIKey
GQYBFALQKPKBPK-UHFFFAOYSA-L
SMILES
CC(=O)NC1=CC2=CC(=C(C(=C2C=C1)O)N=NC3=CC=C(C=C3)S(=O)(=O)CCOS(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+]
Synonyms (6)
- C.I. Reactive Orange 72
- C.I. Reactive Orange 78
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