Description

2-Nitrobenzenesulphonic acid (CAS: 80-82-0) is a high-purity sulfonic acid derivative with the molecular formula C₆H₅NO₅S. This compound, also known by its IUPAC name 2-nitrobenzenesulfonic acid, is a versatile reagent widely used in organic synthesis, pharmaceuticals, and chemical research. It features a nitro group (-NO₂) ortho to the sulfonic acid (-SO₃H) group, enhancing its reactivity in electrophilic and nucleophilic substitution reactions.

Our product is rigorously tested for purity, stability, and consistency, making it ideal for laboratory-scale experiments and industrial applications. It is supplied as a crystalline solid with excellent solubility in polar solvents such as water, ethanol, and dimethyl sulfoxide (DMSO). Suitable for use as an intermediate in dye synthesis, catalyst preparation, and as a precursor for sulfonamide derivatives.

Packaged in amber glass bottles or polyethylene containers to ensure long-term stability. Available in quantities ranging from grams to kilograms to meet diverse research and production needs.

Properties

• CAS Number: 80-82-0
• Complexity: 287
• IUPAC Name: 2-nitrobenzenesulfonic acid
• InChI: InChI=1S/C6H5NO5S/c8-7(9)5-3-1-2-4-6(5)13(10,11)12/h1-4H,(H,10,11,12)
• InChI Key: HWTDMFJYBAURQR-UHFFFAOYSA-N
• Exact Mass: 202.98884343
• Molecular Formula: C6H5NO5S
• Molecular Weight: 203.17
• SMILES: C1=CC=C(C(=C1)[N+](=O)[O-])S(=O)(=O)O
• Topological: 109
• Monoisotopic Mass: 202.98884343
• Physical Description: Nitrobenzenesulfonic acid appears as a whitish colored solid in the form of flakes. It will form a corrosive solution in water. Denser than water. Severely irritates skin and eyes. Used to make other chemicals.
• Synonyms: 2-NITROBENZENESULFONIC ACID, 80-82-0, 31212-28-9, Benzenesulfonic acid, 2-nitro-, 2-Nitrobenzenesulphonic acid, Nitrobenzenesulphonic acid, CCRIS 3130, Nitrobenzenesulfonic acid, EINECS 201-311-6, DTXSID601033533, DTXCID7038315, DTXSID9075321, 201-311-6, o-Nitrobenzenesulfonic acid, 2-nitro-benzenesulfonic acid, Benzenesulfonic acid, nitro-, 2-nitrobenzene-1-sulfonic acid, Nitrobenzolsulfosaure, SCHEMBL63933, 2-Nitrobenzenesulfonic acid #, SCHEMBL151052, SCHEMBL237684, SCHEMBL457268, SCHEMBL457269, SCHEMBL906472, SCHEMBL8002521, AAA08082, AKOS015917547, 369V94Y7E9, BS-22943, N0139, NS00005172, EN300-3510293, A820757, A839983, Nitrobenzenesulfonic acid [UN2305] [Corrosive], Q63408758

Application

2-Nitrobenzenesulphonic acid is primarily used as an intermediate in organic synthesis, particularly in the production of dyes, pigments, and sulfonamide-based pharmaceuticals. Its reactive sulfonic acid group makes it valuable for introducing sulfonate functionalities into aromatic systems. Researchers also employ it as a catalyst or reagent in nitration and sulfonation reactions. Additionally, it serves as a precursor for specialized surfactants and corrosion inhibitors in industrial applications.

Safety and Hazards

GHS Hazard Statements

• Not Classified
• Reported as not meeting GHS hazard criteria by 37 of 40 companies (only 7.5% companies provided GHS information). For more detailed information, please visit ECHA C&L website.

Hazard Classes and Categories

• Not Classified

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