sodium 2-[(2-hydroxynaphthyl)azo]naphthalenesulphonate synthesis
1synthesis methods
- Product Name:sodium 2-[(2-hydroxynaphthyl)azo]naphthalenesulphonate
- CAS Number:1248-18-6
- Molecular formula:C20H15N2NaO4S
- Molecular Weight:402.4
Yield:1248-18-6 89%
Reaction Conditions:
Stage #1:2-aminonaphthalenesulfonic acid with hydrogenchloride;sodium hydroxide;sodium nitrite in water at 0; for 0.5 h;
Stage #2:β-naphthol with sodium carbonate in ethanol;water at 0;
References:
Belai, Nebebech;Harp, Bhakti Petigara;Mazzola, Eugene P.;Lam, Yiu-Fai;Abdeldayem, Ehab;Aziz, Aaron;Mossoba, Magdi M.;Barrows, Julie N. [Dyes and Pigments,2012,vol. 95,# 2,p. 304 - 312] Location in patent:experimental part