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| | 1-Amino-2-naphthalenesulfonic acid Basic information |
| Product Name: | 1-Amino-2-naphthalenesulfonic acid | | Synonyms: | 1-amino-2-naphthalenesulfonicaci;1,2-Naphthylaminesulfonic acid;α-Naphthylamine-2-sulfonic acid;1-azanylnaphthalene-2-sulfonic acid;O-NAPHTHIONIC ACID;ONZWNZGVZFLMNZ-UHFFFAOYSA-N;1-NAPHTHYLAMINE-2-SULFONIC ACID;1-aminonaphthalene-2-sulphonic acid | | CAS: | 81-06-1 | | MF: | C10H9NO3S | | MW: | 223.25 | | EINECS: | 201-320-5 | | Product Categories: | | | Mol File: | 81-06-1.mol |  |
| | 1-Amino-2-naphthalenesulfonic acid Chemical Properties |
| | 1-Amino-2-naphthalenesulfonic acid Usage And Synthesis |
| Chemical Properties | 1-Aminonaphthalene-2-sulfonic acid [81- 06-1]. ortho-naphthionic acid, C10H9NO3S, Mr 223.24, mp 262 – 265℃ (decomp.), is sparingly soluble in cold water but dissolves in hot water to give a 3 % solution. The sodium salt is more readily soluble in water (1.7 % at 20℃ and 10 % at 100℃). The calcium salt is similarly soluble, but the barium salt is almost insoluble. | | Production Methods | 1-Naphthylamine can be sulfonated by heating with sulfuric acid at 180 – 185℃, but the transient intermediate naphthalene-1-sulfamic acid is best prepared from 1-aminonaphthalene-4-sulfonic acid (naphthionic acid). When sodium naphthionate is heated in a solvent such as o-dichlorobenzene or xylene at 225℃, thermal rearrangement occurs to give the 1,2-isomer in high yield. |
| | 1-Amino-2-naphthalenesulfonic acid Preparation Products And Raw materials |
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