Description

2-Amino-5-chloro-4-methylbenzenesulfonic acid (CAS No. 88-53-9) is a high-purity sulfonic acid derivative with the molecular formula C₇H₈ClNO₃S. This compound, also known as Lake Red C Amine, is a fine crystalline powder extensively utilized in organic synthesis and dye manufacturing. Its benzenesulfonic acid backbone, substituted with amino, chloro, and methyl functional groups, makes it a versatile intermediate for coupling reactions and azo dye production. Ideal for research and industrial applications, our product is rigorously tested for consistency, solubility, and reactivity. Packaged under controlled conditions to ensure stability and longevity, it is an essential reagent for chemists specializing in pigments, pharmaceuticals, and advanced material science.

Properties

• CAS Number: 88-53-9
• Complexity: 274
• IUPAC Name: 2-amino-5-chloro-4-methyl-benzenesulfonic acid
• InChI: InChI=1S/C7H8ClNO3S/c1-4-2-6(9)7(3-5(4)8)13(10,11)12/h2-3H,9H2,1H3,(H,10,11,12)
• InChI Key: VYZCFAPUHSSYCC-UHFFFAOYSA-N
• Exact Mass: 220.9913420
• Molecular Formula: C7H8ClNO3S
• Molecular Weight: 221.66
• SMILES: CC1=CC(=C(C=C1Cl)S(=O)(=O)O)N
• Topological: 88.8
• Monoisotopic Mass: 220.9913420
• Physical Description: Other Solid
• Synonyms: 88-53-9, 2-AMINO-5-CHLORO-4-METHYLBENZENESULFONIC ACID, Lake Red C Amine, Red Lake C amine, Benzenesulfonic acid, 2-amino-5-chloro-4-methyl-, 3-Amino-6-chlorotoluene-4-sulfonic acid, 5-Amino-2-chlorotoluene-4-sulphonic acid, CCRIS 2283, HSDB 5259, p-Toluenesulfonic acid, 2-amino-5-chloro-, EINECS 201-839-7, DTXSID7026528, AI3-28529, HNF96511X2, 2-Amino-4-methyl-5-chlorobenzenesulfonic acid, 2-amino-5-chloro-p-toluenesulfonic acid, DTXCID406528, EC 201-839-7, o-chloro-m-toluidine-p-sulfonic acid, 2-chloro-5-aminotoluene-4-sulfonic acid, 2-CHLORO-5-TOLUIDINE-4-SULFONIC ACID, 1-AMINO-4-CHLORO-5-METHYLBENZENE-2-SULFONIC ACID, 2-AMINO-5-CHLORO-4-METHYLBENZENESULFONIC ACID [HSDB], RED LAKE CAMINE, 3Amino6chlorotoluene4sulfonic acid, 5Amino2chlorotoluene4sulphonic acid, pToluenesulfonic acid, 2amino5chloro, Benzenesulfonic acid, 2amino5chloro4methyl, 5-Amino-2-chlorotoluene-4-sulfonic Acid, 2-amino-5-chloro-4-methylbenzene-1-sulfonic acid, 4-Chloro-m-toluidine-6-sulfonic Acid, 4-Chloro-5-methylaniline-2-sulfonic Acid, 2-amino-5-chloro-4-methyl-benzenesulfonic acid, UNII-HNF96511X2, C-Saure, 2-Amino-5-chloro-4-methylbenzenesulfonicacid, SCHEMBL315975, SCHEMBL1806082, CHEMBL3182943, Tox21_200678, MFCD00043924, AKOS015890368, CAS-88-53-9, NCGC00248793-01, NCGC00258232-01, 2-chloro-5-amino-4-toluene sulfonic acid, A0287, NS00006679, Q17521832

Application

2-Amino-5-chloro-4-methylbenzenesulfonic acid serves as a key intermediate in the synthesis of azo dyes, particularly for vibrant red pigments like Lake Red C. It is employed in organic coupling reactions to produce sulfonated aromatic compounds with enhanced water solubility. Researchers also utilize it in pharmaceutical derivatization and as a building block for specialty chemicals requiring sulfonic acid functionality.

Safety and Hazards

GHS Hazard Statements

• H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]

Precautionary Statements

• P264+P265, P280, P305+P351+P338, and P337+P317

Hazard Classes and Categories

• Skin Corr. 1B (26.5%)
• Eye Irrit. 2 (71.4%)

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