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| | Naphthionic acid Basic information |
| | Naphthionic acid Chemical Properties |
| Hazard Codes | C | | Risk Statements | 34-22 | | Safety Statements | 26-36/37/39-45-25 | | RIDADR | UN 2585 8/PG 3 | | WGK Germany | 3 | | RTECS | QK1270000 | | TSCA | Yes | | HazardClass | 8 | | PackingGroup | III | | HS Code | 29214500 |
| | Naphthionic acid Usage And Synthesis |
| Chemical Properties | slightly greyish to beige powder and granules | | Uses | Intermediate for azo dyes, e.g., Congo red. | | Uses | 4-Amino-1-naphthalenesulfonic acid has potent therapeutic applications. Its sodium salt has been used as non-toxic hemostatic. It is also a metabolite of azo dyes. | | Definition | ChEBI: Naphthionic acid is an aminonaphthalenesulfonic acid. | | General Description | 4-Amino-1-naphthalenesulfonic acid is a diazo compound. It is also known as Piria′s acid. | | Purification Methods | It crystallises from H2O as needles of the 0.5 hydrate. Salt solutions fluoresce strongly blue. The S-benzylisothiuronium salt has m 195o (from aqueous EtOH). [Beilstein 14 IV 2793.] |
| | Naphthionic acid Preparation Products And Raw materials |
| Raw materials | Phenol-->Sodium sulfide-->1,2,4-Trichlorobenzene-->2-naphthylammonium chloride-->N-Acetyl-1-aminonaphthalene-->1-Naphthylamine-->5-Amino-1-naphthalenesulfonic acid | | Preparation Products | Congo Red-->Acid Red 27-->Sunset Yellow FCF-->Acid Red 18-->1-Naphthol-4-sulfonic acid-->2,3-Dichloro-1,4-naphthoquinone-->C.I. 14720-->Direct Yellow 106-->Sodium 4-amino-1-naphthalenesulfonate-->DIRECT RED 26-->1-Naphthalenesulfonic acid, 4-amino-3-[2-(4-nitrophenyl)diazenyl]-, sodium salt (1:1)-->2,7-Naphthalenedisulfonic acid, 4-amino-5-[[(4-methylphenyl)sulfonyl]oxy]-3-[(4-sulfo-1-naphthalenyl)azo]-, trisodium salt-->BRILLIANT PURPURIN R-->trisodium 5-[[(2,3-dichloro-6-quinoxalinyl)carbonyl]amino]-4-hydroxy-3-[(2-sulphonatophenyl)azo]naphthalene-2,7-disulphonate-->Aluminum, 3-hydroxy-4-[(4-sulfo-1-naphthalenyl)azo]-2,7-naphthalenedisulfonic acid complex-->Congo Red |
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