C10H9NO7S2
319.3 g/mol
Dye & PigmentWarning
2,7-Naphthalenedisulfonic acid, 3-amino-5-hydroxy-
CAS90-40-4EC201-989-3
Category
Dye & Pigment
Compound Class
Aromatic
Primary Use
dye intermediate
This compound is a naphthalene-based compound containing amino and hydroxyl functional groups along with two sulfonic acid groups. It is primarily used as an intermediate in the synthesis of dyes and pigments.
dye intermediate
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 0.76
7-Amino-1,3,6-naphthalenetrisulfonic acid
CAS118-03-6
dye intermediate
ReferenceSame Category
2-amino-8-hydroxynaphthalene-6-sulfonic acid
CAS90-51-7
Dye intermediate for azo dyes
ReferenceSame Category
Michler's ketone
CAS90-94-8
Intermediate for dyes and pigments
ReferenceSame Category
O-phthalodinitrile
CAS91-15-6
precursor to phthalocyanine pigments and dyes
ReferenceSame Category
2-(4-Aminoanilino)-5-nitrobenzenesulphonic acid
CAS91-29-2
dye intermediate
Safety Reference
Warning
H319Causes serious eye irritation
Customs Tariff Classification
The international HS code for 2,7-Naphthalenedisulfonic acid, 3-amino-5-hydroxy- (CAS 90-40-4) 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
3-amino-5-hydroxynaphthalene-2,7-disulfonic acid
InChIKey
VNWVMZDJPMCAKD-UHFFFAOYSA-N
SMILES
C1=C2C=C(C(=CC2=C(C=C1S(=O)(=O)O)O)N)S(=O)(=O)O
Synonyms (11)
- 2, 3-amino-5-hydroxy-
- 2R Acid
- Gamma disulfo acid
- RR Acid
Sourcing 2,7-Naphthalenedisulfonic acid, 3-amino-5-hydroxy-?
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