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| | 2-Amino-1,5-naphthalenedisulfonic acid Basic information |
| | 2-Amino-1,5-naphthalenedisulfonic acid Chemical Properties |
| Hazard Codes | Xi,C | | Risk Statements | 36-34 | | Safety Statements | 26-28A | | RIDADR | 1759 | | WGK Germany | 2 | | RTECS | QJ6135000 | | F | 8-10 | | HazardClass | 8 | | PackingGroup | III | | Toxicity | LD50 oral in rat: 5430mg/kg |
| | 2-Amino-1,5-naphthalenedisulfonic acid Usage And Synthesis |
| Description | 2-Aminonaphthalene-1,5-disulfonic acid [117-62-4]. 5-sulfo-Tobias acid, C10H9NO6S2, Mr 303.32, is purified by crystallization of the dipotassium salt from water. Alkali fusion results in formation of 2-amino-5-hydroxynaphthalene-1-sulfonic acid. Sulfonation (40 % oleum, 100℃) gives 2-aminonaphthalene-1,5,7-trisulfonic acid. Heating with aqueous sulfuric acid produces 2-aminonaphthalene-5- sulfonic acid. The diazo compound is converted to 2-diazo-1-hydroxynaphthalene-5-sulfonic acid on treatment with alkaline hypochlorite. | | Chemical Properties | BEIGE POWDER | | Uses | ?As a diazo component in orange and red azo reactive dyes, 2-Amino-1,5-naphthalenedisulfonic acid gives more bathochromic shades than Tobias acid. | | Production Methods | Sulfonation of Tobias acid to produce 2-aminonaphthalene-5-sulfonic acid proceeds via 2-Aminonaphthalene-1,5-disulfonic acid, which is isolated from the quenched reaction mixture with careful avoidance of desulfonation. |
| | 2-Amino-1,5-naphthalenedisulfonic acid Preparation Products And Raw materials |
| Raw materials | 2-Aminonaphthalene-1-sulfonic acid | | Preparation Products | 6-AMINO-1-NAPHTHOL-->2-Amino-5-hydroxynaphthalene-1,7-disulfonic acid-->6-Amino-1-naphthalenesulfonic acid-->REACTIVE ORANGE 84-->trisodium 2-[[6-[(4,6-dichloro-1,3,5-triazin-2-yl)methylamino]-1-hydroxy-3-sulphonato-2-naphthyl]azo]naphthalene-1,5-disulphonate-->Reactive Red 239-->Reactive Yellow 37-->Reactive orange 64-->1,5-Naphthalenedisulfonicacid,2-[2-[8-[(4,6-dichloro-5-cyano-2-pyrimidinyl)amino]-1-hydroxy-3,6-disulfo-2-naphthalenyl]diazenyl]-,sodium salt (1:4)-->Reactive orange 122-->trisodium 2-[[6-[(4-amino-6-chloro-1,3,5-triazin-2-yl)methylamino]-1-hydroxy-3-sulphonato-2-naphthyl]azo]naphthalene-1,5-disulphonate-->REACTIVE RED 195-->Reactive Blue 222 |
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