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| | 2,2'-Benzidinedisulfonic acid Basic information |
| Product Name: | 2,2'-Benzidinedisulfonic acid | | Synonyms: | 4,4’-diaminodiphenyl-2,2’-disulfonicacid;kyselinabenzidin-2,2’-disulfonova;2,2'-disulfo-4,4'diaminobibenzene;2,2'-BENZIDINEDISULFONIC ACID (CONTAINS 30% WATER AT MAXIMUM) 70+%;2,2’-BENZIDINE-DISULPHONIC ACID， HPLC 96+％;6,6'-bimetanilic acid;2,2'-Disulfo-4,4'-diaminobiphenyl;2,2'-disulfobenzidine | | CAS: | 117-61-3 | | MF: | C12H12N2O6S2 | | MW: | 344.36 | | EINECS: | 204-200-0 | | Product Categories: | Intermediates of Dyes and Pigments;Biphenyl & Diphenyl ether | | Mol File: | 117-61-3.mol |  |
| | 2,2'-Benzidinedisulfonic acid Chemical Properties |
| Melting point | 175°C | | Boiling point | 638.25℃[at 101 325 Pa] | | density | 1.5417 (rough estimate) | | vapor pressure | 0Pa at 25℃ | | refractive index | 1.6510 (estimate) | | storage temp. | Keep in dark place,Inert atmosphere,Room temperature | | pka | -1.85±0.50(Predicted) | | form | Powder | | color | Dark purple | | Water Solubility | <0.1 g/100 mL at 20 ºC | | LogP | 1.102 at 24℃ | | CAS DataBase Reference | 117-61-3(CAS DataBase Reference) | | EPA Substance Registry System | |
| | 2,2'-Benzidinedisulfonic acid Usage And Synthesis |
| Chemical Properties | PURPLE CRYSTALLINE POWDER | | Uses | 4,4'-Diaminobiphenyl-2,2'-disulfonic acid hydrate is an important raw material and intermediate used in Organic Synthesis, Pharmaceuticals, Agrochemicals and Dyestuff. Benzidine-2,2' -disulfonic acid is used in the production of yellow and red azo dyes. | | Production Methods | 2,2'-Benzidinedisulfonic acid is made from the potassium or sodium salt of 3- nitrobenzenesulfonic acid by a gradual reduction using zinc dust and sodium hydroxide solution in a dilute aqueous solution. The product is subsequently rearranged using hydrochloric acid or dilute sulfuric acid. Electrochemical or catalytic reductions are also possible.
| | General Description | Leaflets or prisms or light purple powder. | | Air & Water Reactions | Insoluble in water. | | Fire Hazard | Flash point data for 2,2'-Benzidinedisulfonic acid are not available; however, 2,2'-Benzidinedisulfonic acid is probably combustible. | | Flammability and Explosibility | Non flammable | | Safety Profile | A severe eye irritant. When heated to decomposition it emitsvery toxic fumes of SOx and NOx. |
| | 2,2'-Benzidinedisulfonic acid Preparation Products And Raw materials |
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