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Abstract of Dissertation
Methods of Dyeing with Columbia Yellow 1118
Metallic salts of Columbia Yellow
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110 degrees 2(p-amino phenyl 2(p-azo phenyl 2(p-nitro phenyl 6-methyl benzothiazole acid to form added air dry sample alcohol amino compound amino group azo compound azo product benzothiazole-6 benzoyl chloride bia Yellow Calc cerium Colum combustion analysis commercial Columbia Yellow commercial product constant weight crystallized decolorizes diazo diazonium salt dissolves in conc disulfide dried dye cotton directly echt gelb fastness to alkali ferric chloride filter form of Columbia Found free sulfonic acid gave gives HSO3 group hydrosulfite hypochlorite method methyl group molecular weight name of Columbia NaOCl nitro compounds obtained orange red patent potassium ferricyanide powder preparation of Columbia preparing Columbia Yellow purified quinone structure readily soluble red product salt of dehydrothio-p-toluidine slightly soluble soda sodium hydrosulfite sodium salt solved in water stilbene sulfonic acid form sulfuric sulphonic synthetic thiophenol toluidine vat dyeing Water of Crystallization water solution yellow precipitate yellow shade yield zinc dust zinc salt