C6H7NO4S
189.19 g/mol
Dye & PigmentDanger
3-Amino-4-hydroxybenzenesulfonic acid
CAS98-37-3EC202-662-8
Category
Dye & Pigment
Compound Class
Aromatic
Primary Use
Dye intermediate
3-Amino-4-hydroxybenzenesulfonic acid is a chemical compound that appears as rhombic brown crystals. It is primarily used as an intermediate in the production of dyes and pharmaceuticals.
Dye intermediatePharmaceutical 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 0.73
3,3'-Diamino-4,4'-dihydroxydiphenyl sulfone
CAS7545-50-8
pharmaceutical intermediate
SimilarStructure SimilarSimilarity 0.73
4-hydroxymetanilamide
CAS98-32-8
pharmaceutical intermediate
ApplicationSame Use
2,4-Dimethylaniline-6-sulfonic acid
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Dye intermediate
ApplicationSame Use
Sodium 2-chloro-5-nitrobenzenesulfonate
CAS946-30-5
Dye intermediate
ApplicationSame Use
4-Amino-2,5-dichlorobenzenesulfonic acid
CAS88-50-6
Dye intermediate
ApplicationSame Use
N,N-diethyl-m-aminophenol
CAS91-68-9
Dye intermediate
ReferenceSame Category
3-amino-4-methoxybenzenesulfonic acid
CAS98-42-0
dye intermediate for food products
ReferenceSame Category
2-amino-p-benzenedisulfonic acid
CAS98-44-2
dye intermediate
Safety Reference
Danger
H314Causes severe skin burns and eye damage
H315Causes skin irritation
H319Causes serious eye irritation
Customs Tariff Classification
The international HS code for 3-Amino-4-hydroxybenzenesulfonic acid (CAS 98-37-3) is 2922.29.
HS code (international, 6-digit)
2922.29
EU CN code (8-digit)
2922 29 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-4-hydroxybenzenesulfonic acid
InChIKey
ULUIMLJNTCECJU-UHFFFAOYSA-N
SMILES
C1=CC(=C(C=C1S(=O)(=O)O)N)O
Synonyms (26)
- 2-AMINOPHENOL-4-SULFONIC ACID
- 2-Amino-4-sulfophenol
- 2-Hydroxy-5-sulfoaniline
- 2Aminophenol4sulphonic acid
- 4-Hydroxymetanilic acid
- Metanilic acid, 4hydroxy
- aniline, 2-hydroxy-5-sulpho-
- o-Aminophenol-p-sulfonic acid
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