C6H7NO3S
173.19 g/mol
Dye & PigmentWarning
Metanilic acid
CAS121-47-1EC204-473-6
Category
Dye & Pigment
Compound Class
Aromatic
Primary Use
Dye intermediate for azo dyes
Metanilic acid is a dye intermediate primarily used in the production of azo dyes. It is an aromatic amine with a sulfonic acid group, giving it moderate polarity and hydrogen-bonding capacity.
Dye intermediate for azo dyesIntermediate for sulfa drugsIntermediate for fine chemicals
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
ApplicationSame Use
8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt monohydrate
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Dye intermediate for azo dyes
ApplicationSame Use
3-amino-5-chloro-2-hydroxybenzenesulfonic acid
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Dye intermediate for azo dyes
ApplicationSame Use
4-(4-Aminoanilino)-3-nitrobenzenesulphonic acid
CAS135-11-5
Dye intermediate for azo dyes
ApplicationSame Use
2,4-diaminobenzenesulfonic acid
CAS88-63-1
Dye intermediate for azo dyes
ReferenceSame Category
3-Amino-4-chlorobenzotrifluoride
CAS121-50-6
Diazo dye intermediate
ReferenceSame Category
N,N-dimethylaniline
CAS121-69-7
Intermediate for dye synthesis
ReferenceSame Category
M-chloronitrobenzene
CAS121-73-3
chemical intermediate for dyes
ReferenceSame Category
2-Chloro-4-nitroaniline
CAS121-87-9
Intermediate in manufacture of dyes
Safety Reference
Warning
H302Harmful if swallowed
H312Harmful in contact with skin
H332Harmful if inhaled
Customs Tariff Classification
The international HS code for Metanilic acid (CAS 121-47-1) is 2921.42.
HS code (international, 6-digit)
2921.42
EU CN code (8-digit)
2921 42 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-aminobenzenesulfonic acid
InChIKey
ZAJAQTYSTDTMCU-UHFFFAOYSA-N
SMILES
C1=CC(=CC(=C1)S(=O)(=O)O)N
Synonyms (22)
- 3-AMINOBENZENESULFONIC ACID
- 3-Aminobenzenesulphonic acid
- 3-Sulfoaniline
- 3-anilinesulfonic acid
- AMINOBENZENESULFONIC ACID, M-
- Aminobenzenesulfonic acid
- Aniline-m-sulfonic acid
- Kyselina anilin-3-sulfonova
- Kyselina metanilova
- Kyselina metanilova [Czech]
- Metanilic acid
- aniline-3-sulphonic acid
- m-Aminobenzenesulfonic acid
- m-Aminophenylsulfonic acid
- m-Anilinesulfonic acid
- m-Sulfanilic acid
- m-sulphanilic acid
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