C10H9NO7S2
319.3 g/mol
Dye & PigmentDanger
4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid
CAS90-20-0EC201-975-7
Category
Dye & Pigment
Compound Class
Aromatic
Primary Use
dye and industrial waste
4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid is a dye compound that has been identified in industrial waste. It contains aromatic rings and sulfonic acid groups, contributing to its solubility and use in dye-related applications.
dyeindustrial waste constituent
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
SimilarStructure SimilarSimilarity 0.74
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ReferenceSame Category
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dye intermediate
ReferenceSame Category
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Dye intermediate for azo dyes
ReferenceSame Category
Michler's ketone
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Intermediate for dyes and pigments
ReferenceSame Category
O-phthalodinitrile
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precursor to phthalocyanine pigments and dyes
Referencestereoisomer of
8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt monohydrate
CAS5460-09-3
Dye intermediate for azo dyes
Safety Reference
Danger
H302Harmful if swallowed
H332Harmful if inhaled
H314Causes severe skin burns and eye damage
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid (CAS 90-20-0) is 2922.21.
HS code (international, 6-digit)
2922.21
EU CN code (8-digit)
2922 21 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
4-amino-5-hydroxynaphthalene-2,7-disulfonic acid
InChIKey
APRRQJCCBSJQOQ-UHFFFAOYSA-N
SMILES
C1=C2C=C(C=C(C2=C(C=C1S(=O)(=O)O)N)O)S(=O)(=O)O
Synonyms (26)
- 3I0
- 2, 4-amino-5-hydroxy-
- H acid
- Kyselina H
- Kyselina H [Czech]
Sourcing 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid?
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