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| | 6-Amino-1-naphthalenesulfonic acid Basic information |
| Product Name: | 6-Amino-1-naphthalenesulfonic acid | | Synonyms: | 6-aminonaphthalene-1-sulphonic acid;6-aminonaphthalene-1-sulfonic acid;6-azanylnaphthalene-1-sulfonic acid;Dahl's Acid
2-Naphthylamine-5-sulfonic Acid;6-Amino-1-naphthalenesulfonicAcid,95%;D ACID;BETA-NAPHTHYLAMINE-5-SULFONIC ACID;2-AMINONAPHTHALENE-5-SULFONIC ACID | | CAS: | 81-05-0 | | MF: | C10H9NO3S | | MW: | 223.25 | | EINECS: | 201-318-4 | | Product Categories: | Intermediates of Dyes and Pigments | | Mol File: | 81-05-0.mol |  |
| | 6-Amino-1-naphthalenesulfonic acid Chemical Properties |
| density | 1.3588 (rough estimate) | | refractive index | 1.6500 (estimate) | | storage temp. | under inert gas (nitrogen or Argon) at 2–8 °C | | form | powder to crystal | | pka | -0.33±0.40(Predicted) | | color | White to Light yellow to Light red | | Water Solubility | 0.33g/L(20 ºC) | | Merck | 14,6407 | | CAS DataBase Reference | 81-05-0(CAS DataBase Reference) |
| RIDADR | 1759 | | HazardClass | 8 | | PackingGroup | III | | HS Code | 29269095 |
| | 6-Amino-1-naphthalenesulfonic acid Usage And Synthesis |
| Chemical Properties | 2-Aminonaphthalene-5-sulfonic acid [81-05-0]. (6-aminonaphthalene-1-sulfonic acid), Dahl’s acid, Dressel acid, D acid, C10H9NO3S, Mr 223.24, crystallizes from water as needles although only 0.4 % soluble at 100℃. The sodium, calcium, and barium salts are moderately soluble in water. Bromination in acetic acid gives the 1-bromo derivative. Sulfonation with oleum gives a mixture of 2-aminonaphthalene-5,7-disulfonic acid together with some 1,5-disulfonic acid. Fusion with potassium hydroxide at 260℃ yields 6-amino-1-naphthol. | | Production Methods | Tobias acid is added to a mixture of sulfuric acid and oleum, and the reaction is completed by stirring for 12 h at 25℃. The resulting sulfonation mass, containing mainly 2-aminonaphthalene-1,5-disulfonic acid, is poured into water and heated at 105℃ for 3 h to desulfonate and precipitate the product which, after cooling, is filtered off; the yield is 95 %. |
| | 6-Amino-1-naphthalenesulfonic acid Preparation Products And Raw materials |
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