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| | 2-Naphthylamine-5,7-disulfonic acid Basic information |
| | 2-Naphthylamine-5,7-disulfonic acid Chemical Properties |
| RIDADR | 1759 | | HazardClass | 8 | | PackingGroup | III | | Toxicity | rat,LD50,oral,2gm/kg (2000mg/kg),"Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986Vol. -, Pg. 1059, 1986. |
| | 2-Naphthylamine-5,7-disulfonic acid Usage And Synthesis |
| Chemical Properties | White glossy long prismatic needle-like crystals, the crystals precipitated from water contain 5 molecules of crystal water. The solubility in water at 20°C is 23%. Its monosodium salt and monopotassium salt are commonly used in industry, both of which are soluble in water, and the salt solution has green fluorescence. | | Uses | 2-Naphthylamine-5,7-disulfonic acid is an intermediate for the preparation of J acid, bis-J acid, phenyl J acid and scarlet acid. | | Hazard | Skin - Rabbit 2 mg/24h severe; Eye - Rabbit 0.75 mg/24h severe | | Flammability and Explosibility | Not classified | | Synthesis | 2-Naphthylamine-5,7-disulfonic acid can be obtained by hydrolysis of 2-naphthylamine-1,5,7-trisulfonic acid. Add sulfuric acid, sodium sulfate and 2-naphthylamine-1,5,7-trisulfonic acid into water, keep warm at 110-120°C for 4 hours, cool and filter, and wash in sodium sulfate solution to obtain the product. |
| | 2-Naphthylamine-5,7-disulfonic acid Preparation Products And Raw materials |
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