(2-alkoxy-4-sulfonyl-5-alkylphenyl)azo-1-hydroxynaphthalene sulf

Details (2-alkoxy-4-sulfonyl-5-alkylphenyl)azo-1-hydroxynaphthalene sulf (2-alkoxy-4-sulfonyl-5-alkylphenyl)azo-1-hydroxynaphthalene sulf

1984-06-05

1987-06-23

Higel, Floyd D.

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

426250, 534884, 534887, A23L 1275, C09B 2901, C09B 2916, D06P 139

Patent

active

046753893

ABSTRACT:
Physiologically acceptable cation salts of (2-alkoxy-4-sulfonyl-5-alkylphenyl)azo-1-hydroxynaphthalene sulfonic acids useful as blue-red colorants for textile fabrics, cellulosic fibers and edible compositions are prepared by diazotizing 2-alkoxy-4-sulfonyl-5-alkylanilines and coupling the resulting diazo compounds to a 1-hydroxynaphthalene mono- or disulfonic acid.

REFERENCES:
patent: 3519617 (1970-07-01), Rast et al.
patent: 3578652 (1971-05-01), Rast et al.
patent: 3640733 (1972-02-01), Rast et al.
Colour Index, 3rd Edition, vol. 4, pp. 4071 (#14825) and 4074 (#'s 14940 and 14965), (1971).
Colour Index 14700.
Colour Index 16185.

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