Description

Orthanilic Acid (2-Aminobenzenesulfonic Acid) is a high-purity sulfonic acid derivative widely utilized in chemical synthesis and industrial applications. With the molecular formula C₆H₇NO₃S and CAS number 88-21-1, this compound is an essential intermediate in the production of dyes, pigments, and pharmaceuticals. Its aromatic amine and sulfonic acid functional groups enable versatile reactivity, making it valuable for coupling reactions and as a precursor in azo dye synthesis. Our product is rigorously tested to ensure optimal purity, stability, and consistency, meeting the stringent requirements of research and industrial processes. Packaged under controlled conditions to maintain integrity, Orthanilic Acid is an indispensable reagent for scientists and manufacturers.

Properties

• CAS Number: 88-21-1
• Complexity: 218
• IUPAC Name: 2-aminobenzenesulfonic acid
• InChI: InChI=1S/C6H7NO3S/c7-5-3-1-2-4-6(5)11(8,9)10/h1-4H,7H2,(H,8,9,10)
• InChI Key: ZMCHBSMFKQYNKA-UHFFFAOYSA-N
• Exact Mass: 173.01466426
• Molecular Formula: C6H7NO3S
• Molecular Weight: 173.19
• SMILES: C1=CC=C(C(=C1)N)S(=O)(=O)O
• Topological: 88.8
• Monoisotopic Mass: 173.01466426
• Physical Description: 2-aminobenzene sulfonic acid is a light brown powder.
• Melting Point: 617 °F
• Solubility: 10 to 50 mg/mL at 72 °F
• Synonyms: 2-Aminobenzenesulfonic acid, 88-21-1, Orthanilic acid, o-Sulfanilic acid, 2-Aminobenzenesulphonic acid, Aniline-o-sulfonic acid, 2-Sulfanilic acid, Aniline-o-sulphonic acid, 1-Aminobenzene-2-sulfonic acid, Benzenesulfonic acid, 2-amino-, Benzenesulfonic acid, o-amino-, Anilino-o-sulfonic acid, Anilino-2-sulfonic acid, Anilino-o-sulphonic acid, NSC 147, CCRIS 4575, aniline-2-sulphonic acid, 2-Sulfoaniline, ZB9JSA4BH0, EINECS 201-810-9, O-ANILINESULFONIC ACID, CHEBI:1015, DTXSID1024463, 2-anilinesulfonic acid, AI3-52212, NSC-147, ORTHANILIC ACID [MI], DTXCID204463, EC 201-810-9, AMINOBENZENESULFONIC ACID, 2-, 2-Aminobenzene sulfonic acid, 2Sulfoaniline, oSulfanilic acid, 2Sulfanilic acid, Anilineosulfonic acid, Anilinoosulfonic acid, oAnilinesulfonic acid, ortho-sulfanilic acid, 2Anilinesulfonic acid, Aniline2sulfonic acid, Anilino2sulfonic acid, Anilineosulphonic acid, Anilinoosulphonic acid, Aniline2sulphonic acid, oAminophenylsulfonic acid, 2Aminophenylsulfonic acid, oAminobenzenesulfonic acid, 2Aminobenzenesulfonic acid, 2Aminobenzenesulphonic acid, 1Aminobenzene2sulfonic acid, 2Aminobenzene sulfonic acid, Benzenesulfonic acid, oamino, oAmino benzene sulfonic acid, Benzenesulfonic acid, 2amino, 2-AMINOPHENYLSULFONIC ACID, O-AMINO BENZENE SULFONIC ACID, inchi=1/c6h7no3s/c7-5-3-1-2-4-6(5)11(8,9)10/h1-4h,7h2,(h,8,9,10, Aniline-2-sulfonic acid, o-Aminobenzenesulfonic acid, 2-amino-benzenesulfonic acid, o-Aminophenylsulfonic acid, 2-aminobenzene-1-sulfonic acid, MFCD00007705, UNII-ZB9JSA4BH0, 2-sulfo-aniline, o-sulphanilic acid, Aniline-2-sulfonate, aminobenzenesulphonic acid, Orthanilic acid (Aniline-2-sulfonic acid), 2-Aminobenzenesulfonicacid, bmse000766, SCHEMBL90023, SCHEMBL156038, SCHEMBL458582, SCHEMBL458583, SCHEMBL588012, NSC147, SCHEMBL2777760, SCHEMBL3293083, 1-aminobenzene-2-sulphonic acid, Aniline-2-sulfonic acid, 95%, CHEMBL1372690, SCHEMBL11123364, Tox21_200956, s6032, SBB061253, STL163408, AKOS000299114, CS-W016018, HY-W015302, CAS-88-21-1, NCGC00091721-01, NCGC00091721-02, NCGC00258509-01, AC-11378, TS-00165, DB-057050, A0266, NS00002203, ST50825042, EN300-79575, C06333, D71116, Q2031743, F0001-2187, Z1211373913

Application

Orthanilic Acid is primarily used as a key intermediate in the synthesis of azo dyes and pigments, contributing to vibrant colorants for textiles and inks. It also serves as a building block in pharmaceutical research, particularly in the development of sulfa drugs and other bioactive molecules. Additionally, its sulfonic acid group makes it useful in ion-exchange resins and surfactants for industrial applications.

Safety and Hazards

GHS Hazard Statements

• H314 (78.6%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
• H319 (20.2%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]

Precautionary Statements

• P260, P264, P264+P265, P280, P301+P330+P331, P302+P361+P354, P304+P340, P305+P351+P338, P305+P354+P338, P316, P321, P337+P317, P363, P405, and P501

Hazard Classes and Categories

• Skin Corr. 1B (78.6%)
• Eye Irrit. 2 (20.2%)

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