C6H7NO3S
173.19 g/mol
Industrial ChemicalWarning
SULFANILIC ACID
CAS121-57-3EC204-482-5
Category
Industrial Chemical
Compound Class
Aromatic
Primary Use
Intermediate for dyes and organic chemicals
Sulfanilic acid is an aromatic sulfonic acid primarily used as an intermediate in the synthesis of dyes and other organic chemicals. It also serves as a reagent in analytical chemistry, such as Ehrlich's reagent and for the determination of nitrites.
Intermediate for dyes and organic chemicalsReagent in analytical chemistry (Ehrlich's reagent, determination of nitrites)
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.
Sourcing SULFANILIC ACID?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
Related Compounds
SimilarStructure SimilarSimilarity 0.75
4-[(4-aminophenyl)diazenyl]benzenesulfonic acid
CAS104-23-4
Azo dye intermediate
ApplicationSame Use
M-toluidine
CAS108-44-1
Intermediate for dyes and organic chemicals
ReferenceSame Category
M-nitrobenzoyl chloride
CAS121-90-4
intermediate for dyes and pharmaceuticals
ReferenceSame Category
Isophthalic acid
CAS121-91-5
intermediate for polymers and resins
ReferenceSame Category
[4-(Octyloxy)phenyl]phenyl-iodonium
CAS121239-74-5
photoinitiator for polymerization reactions
ReferenceSame Category
Ammonium bromide
CAS12124-97-9
Photographic emulsion and fireproofing agent
Referencestereoisomer of
SodiuM Sulfanilate Hydrate
CAS123333-70-0
dye intermediate and analytical reagent
Referencestereoisomer of
Sodium sulfanilate
CAS515-74-2
chemical intermediate for dyes
Safety Reference
Warning
H315Causes skin irritation
H317May cause an allergic skin reaction
H319Causes serious eye irritation
Regulatory Compliance1
- CN Catalogue of Hazardous ChemicalsCNRegulation
Customs Tariff Classification
The international HS code for SULFANILIC ACID (CAS 121-57-3) 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
4-aminobenzenesulfonic acid
InChIKey
HVBSAKJJOYLTQU-UHFFFAOYSA-N
SMILES
C1=CC(=CC=C1N)S(=O)(=O)O
Synonyms (57)
- MESALAZINE IMPURITY O (EP IMPURITY)
- Mesalazine EP Impurity O
- Mesalazine EP Impurity O; Sulfamethoxazole EP Impurity D; Sulfadiazine EP Impurity B; Sulfadimethoxine EP Impurity D; Sulfadimidine EP Impurity F
- SULFADIAZINE IMPURITY B (EP IMPURITY)
- SULFADIMETHOXINE IMPURITY D (EP IMPURITY)
- SULFADIMETHOXINE SODIUM FOR VETERINARY USE IMPURITY D (EP IMPURITY)
- SULFADIMIDINE IMPURITY F (EP IMPURITY)
- SULFAMETHOXAZOLE IMPURITY D (EP IMPURITY)
- SULFANILIC ACID (USP-RS)
- Sulfadimethoxine EP Impurity D
- Sulfanilic acid, United States Pharmacopeia (USP)
- USP Solution Sulfanilic Acid TS Conforms to USP
- 4-AMINOBENZENESULPHONIC ACID
- 4-Aminobenzenesulfonic acid
- 4-Sulfanilic acid
- 4-Sulfoaniline
- 4-aminophenylsulfonic acid
- Aniline-4-sulfonic acid
- Aniline-p-sulfonic acid
- Aniline-p-sulphonic acid
- Kyselina sulfanilova
- Kyselina sulfanilova [Czech]
- MESALAZINE IMPURITY O
- P-SULFANILIC ACID
- PARA-ANILINE SULFONIC ACID
- SUFANILIC ACID
- SULFADIAZINE IMPURITY B
- SULFADIMETHOXINE IMPURITY D
- SULFADIMIDINE IMPURITY F
- SULFAMETHOXAZOLE IMPURITY D
- SULFANILIC ACID
- SULFANILLIC ACID
- Sulfanilic acid, 98%, tech.
- Sulfanilsaeure
- Sulfanilsaeure [German]
- Sulphanilic acid
- aniline-4-sulphonic acid
- p-Aminobenzenesulfonic acid
- p-Aminophenylsulfonic acid
- p-Anilinesulfonic acid
- p-aminobenzenesulphonic acid
- p-sulfoaniline
- p-sulphanilic acid
Sourcing SULFANILIC ACID?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.