Description

2-Chloro-5-nitrobenzenesulfonic acid (CAS No. 96-73-1) is a high-purity sulfonic acid derivative with the molecular formula C₆H₄ClNO₅S. This compound is characterized by its nitro and chloro functional groups attached to a benzenesulfonic acid backbone, making it a versatile intermediate in organic synthesis and industrial applications. It is supplied as a fine crystalline powder with exceptional stability under recommended storage conditions. Ideal for researchers and scientists, this reagent is rigorously tested for purity (typically ≥98% by HPLC or GC analysis) and is suitable for use in pharmaceuticals, agrochemicals, and dye manufacturing. Each batch is accompanied by comprehensive analytical documentation, including NMR, FTIR, and mass spectrometry data.

Properties

• CAS Number: 96-73-1
• Complexity: 318
• IUPAC Name: 2-chloro-5-nitro-benzenesulfonic acid
• InChI: InChI=1S/C6H4ClNO5S/c7-5-2-1-4(8(9)10)3-6(5)14(11,12)13/h1-3H,(H,11,12,13)
• InChI Key: GNTARUIZNIWBCN-UHFFFAOYSA-N
• Exact Mass: 236.9498711
• Molecular Formula: C6H4ClNO5S
• Molecular Weight: 237.62
• SMILES: C1=CC(=C(C=C1[N+](=O)[O-])S(=O)(=O)O)Cl
• Topological: 109
• Monoisotopic Mass: 236.9498711
• Physical Description: Solid;
• Synonyms: 2-Chloro-5-nitrobenzenesulfonic acid, 96-73-1, Benzenesulfonic acid, 2-chloro-5-nitro-, NSC 5375, EINECS 202-528-9, AI3-08898, DTXSID3059137, DTXCID4048987, 2Chloro5nitrobenzenesulphonic acid, Benzenesulfonic acid, 2chloro5nitro, un3261, 2-Chloro-5-nitrobenzenesulphonic acid, 2-chloro-5-nitro-benzenesulfonic acid, NSC-5375, 2-CHLORO-5-NITROBENZENESULFONICACID, NSC5375, MFCD00065336, 5VP8RW8UPB, 2-CHLORO-5-NITROBENZENE SULFONIC ACID, 4-chloro-3-sulphonitrobenzene, SCHEMBL390493, p-Nitrochlorbenzol-o-sulfosaure, SCHEMBL9838827, SCHEMBL27660498, Discontinued. Please see C373875, AKOS016004590, FC20131, 2–Chloro-5-nitro benzene sulphonic acid, CS-0335834, NS00005216, E70395, 1-Chloro-4-nitrobenzene-2-sulfonic acid;3-Sulfo-4-chloronitrobenzene;NSC 5375

Application

2-Chloro-5-nitrobenzenesulfonic acid is widely employed as a key intermediate in the synthesis of dyes, pigments, and specialty chemicals. Its reactive sulfonic acid and nitro groups facilitate electrophilic substitution reactions, making it valuable in pharmaceutical and agrochemical research. The compound is also utilized in corrosion inhibition formulations and as a precursor for sulfonamide-based compounds. Its stability and solubility in polar solvents enhance its utility in laboratory-scale and industrial processes.

Safety and Hazards

GHS Hazard Statements

• H314 (100%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
• H317 (100%): May cause an allergic skin reaction [Warning Sensitization, Skin]

Precautionary Statements

• P260, P261, P264, P272, P280, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P321, P333+P317, P362+P364, P363, P405, and P501

Hazard Classes and Categories

• Skin Corr. 1B (100%)
• Skin Sens. 1 (100%)

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Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.