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Croceic acid

The site at which the sulfo group appears in / -naphthol depends very markedly on the temperature. At low temperatures 2-hydroxy-1-naphthalene-sulfonic acid is obtained 150 at higher temperatures or when an excess of sulfuric acid is used, migration of the sulfo group leads to 7-hydroxy- 1-naph-thalenesulfonic acid (croceic acid), and finally at 110° almost exclusively to 7-hydroxy-2-naphthalenesulfonic acid (Schaffer acid). Further treatment with an excess of sulfuric acid leads to / -naphthol-di- and -tri-sulfonic acids, which are important for the dyestuffs industry but which will not be discussed in detail... [Pg.621]

Hydroxy-1-napbtbaienesui1onic acid Croceic acid C10H9O4S 132-67-0 224.234 SHgO... [Pg.418]

Hydroxy-1 -naphthalenesul-fonic acid Croceic acid C10H3O4S 132-57-0 224.234 sHjO... [Pg.455]

See other pages where Croceic acid is mentioned: [Pg.170]    [Pg.346]    [Pg.405]    [Pg.702]    [Pg.74]    [Pg.701]    [Pg.170]    [Pg.346]    [Pg.405]    [Pg.702]    [Pg.74]    [Pg.701]   
See also in sourсe #XX -- [ Pg.621 ]



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