251917

Sulfanilic acid

ACS reagent, 99%

• Synonym(s): 4-Aminobenzenesulfonic acid, Aniline-4-sulfonic acid
• Linear Formula: 4-(H₂N)C₆H₄SO₃H
• CAS Number: 121-57-3
• Molecular Weight: 173.19
• Beilstein/REAXYS Number: 908765
• EC Number: 204-482-5
• MDL number: MFCD00007886
• UNSPSC Code: 12352100
• PubChem Substance ID: 24855168
• NACRES: NA.21

Properties

• grade: ACS reagent
• Quality Level: 200
• assay: 98.0-102.0% (ACS specification); 99%
• form: powder
• ign. residue: ≤0.01%
• mp: >300 °C (lit.)
• anion traces: chloride (Cl^-): ≤0.002%; nitrite (NO₂^-): ≤0.5 ppm; sulfate (SO₄^2-): ≤0.01%
• SMILES string: Nc1ccc(cc1)S(O)(=O)=O
• InChI: 1S/C6H7NO3S/c7-5-1-3-6(4-2-5)11(8,9)10/h1-4H,7H2,(H,8,9,10)
• InChI key: HVBSAKJJOYLTQU-UHFFFAOYSA-N

Description

Application

The diazonium salt of sulfanilic acid may be used in the preparation of azo dyes such as o-anisaldehyde, orange I and orange II. It may also be used in the preparation of 2,6-dibromoaniline via bromination followed by desulfonation.

Safety Information

• pictograms: GHS07
• signalword: Warning
• hcodes: H315,H317,H319
• pcodes: P261 - P264 - P272 - P280 - P302 + P352 - P305 + P351 + P338
• Hazard Classifications: Eye Irrit. 2 - Skin Irrit. 2 - Skin Sens. 1
• Storage Class: 13 - Non Combustible Solids
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: dust mask type N95 (US), Eyeshields, Faceshields, Gloves