Name | 2-Amino-4-Sulfobenzoic Acid |
Synonyms | 4-SULFOANTHRANILIC ACID 2-amino-4-sulfo-benzoicaci 4-SULFO-2-AMINOBENZOIC ACID 2-Amino-4-Sulfobenzoic Acid 2-AMINO-4-SULFOBENZOIC ACID 2-Amino-4-Sulfo Benzoic Acid 2-amino-4-sulfonicbenzoicacid 4-SULPHO ANTRALINIC ACID (S.A.B.A.) BAS ACID (4 SULPHO ANTHRANILIC ACID) 2-Amino-Benzoic Acid 4-Sulfonic Acid |
CAS | 98-43-1 |
EINECS | 202-668-0 |
InChI | InChI=1/C7H7NO5S/c8-6-3-4(14(11,12)13)1-2-5(6)7(9)10/h1-3H,8H2,(H,9,10)(H,11,12,13) |
Molecular Formula | C7H7NO5S |
Molar Mass | 217.2 |
Density | 1.709±0.06 g/cm3(Predicted) |
Boling Point | 360℃ at 97.5kPa |
Vapor Presure | 0-0Pa at 25℃ |
Appearance | Solid |
pKa | -1.59±0.50(Predicted) |
Refractive Index | 1.661 |
dissociation constant | 0.055-0.056 at 28 ℃ |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
Application | 2-amino -4-sulfonic acid benzoic acid is a fine chemical, can be used for the preparation of dyes, pharmaceuticals, pesticides, etc. |
preparation | The synthesis method of 2-amino -4-sulfonic acid benzoic acid is as follows: the O-nitrotoluene is dissolved in pure sulfuric acid at 25-85 ° C., and then 65% fuming sulfuric acid is added dropwise for sulfonation reaction to obtain 2-nitro-4-sulfonic acid toluene; the above product 2-nitro-4-sulfonyltoluene is then subjected to an auto-redox reaction under basic conditions to form 2-amino-4-sulfonylbenzoic acid, and the reaction is carried out at 60-130°C. |
Use | use as a neutral dye intermediate |