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| | 5-Amino-1-naphthalenesulfonic acid Basic information |
| Product Name: | 5-Amino-1-naphthalenesulfonic acid | | Synonyms: | 5-amino-1-naphthalenesulfonicaci;1-NAPHTHYLAMINE-5-SULFONICACID(LAURENT''SACID);Laurens Acid;Laurents acid~1-Naphthylamine-5-sulphonic acid;1-Amino-5-naphthalenesulfonic acid;1-Aminonaphtalene-5-sulfonic acid, 97%+;5-Aminonaphthalene-1-sulfonic acid, tech. 90%;Laurent's Acid
1-Naphthylamine-5-sulfonic Acid | | CAS: | 84-89-9 | | MF: | C10H9NO3S | | MW: | 223.25 | | EINECS: | 201-571-0 | | Product Categories: | Intermediates of Dyes and Pigments | | Mol File: | 84-89-9.mol |  |
| | 5-Amino-1-naphthalenesulfonic acid Chemical Properties |
| Melting point | >300°C | | Boiling point | 220°C (rough estimate) | | density | 1.3588 (rough estimate) | | refractive index | 1.6500 (estimate) | | solubility | Aqueous Base (Slightly), DMSO (Slightly) | | pka | pK1: 3.69 (25°C) | | form | powder to crystal | | color | Purple to Dark purple to Dark red | | Water Solubility | Soluble in hot water. | | Merck | 14,6404 | | BRN | 2214149 | | CAS DataBase Reference | 84-89-9(CAS DataBase Reference) | | EPA Substance Registry System | |
| Hazard Codes | C | | Risk Statements | 20/21/22-34 | | Safety Statements | 26-36/37/39-45 | | RIDADR | UN 2585 8/PG 3 | | WGK Germany | 3 | | RTECS | QK1270500 | | TSCA | Yes | | HS Code | 2921.45.2000 | | HazardClass | 8 | | PackingGroup | III |
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| | 5-Amino-1-naphthalenesulfonic acid Usage And Synthesis |
| Chemical Properties | ?1-Aminonaphthalene-5-sulfonic acid [84- 89-9]. (5-aminonaphthalene-1-sulfonic acid), Laurent’s acid, L acid, Purpurin acid, C10H9NO3S, Mr 223.24, crystallizes from hot water as needles of the monohydrate. The alkalimetal salts are all readily soluble in water. Bromination yields the 2,4-dibromo derivative, vigorous nitration gives 2,4-dinitro-1- hydroxynaphthalene, and sulfonation results in 1-aminonaphthalene-2,5,7-trisulfonic acid. 1- Hydroxynaphthalene-5-sulfonic acid is obtained by heating 104 with aqueous bisulfite (reverseBucherer reaction) or via the diazo compound. Caustic fusion produces 5-amino-1-hydroxynaphthalene. Coupling with diazo compounds takes place in the 2-position. | | Uses | 5-Aminonaphthalene-1-sulfonic acid is an deriva- tizing agents in the precolumn derivatization of some chiral phenoxy acid. Cu(II) based on a dansyl derivative was synthesized with 29.2% overall yield by a seven-step synthetic procedure from the readily available starting material 5-aminonaphthalene-1-sulfonic acid. | | Uses | Intermediate of dyestuff | | Definition | ChEBI: 5-Amino-1-naphthalenesulfonic acid is a naphthalenesulfonic acid. | | Production Methods | Laurent’s acid is coproduced with Peri acid as the minor component of a 5:2 isolated product ratio. | | Purification Methods | Crystallise the acid under nitrogen from boiling water and dry it in a steam oven [Bryson Trans Faraday Soc 47 522, 527 1951]. [Beilstein 14 IV 2800.] |
| | 5-Amino-1-naphthalenesulfonic acid Preparation Products And Raw materials |
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