C.I. Direct Blue 151
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C.I. Direct Blue 151
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CAS No:
110735-25-6
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Chemical Name:
C.I. Direct Blue 151
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Synonyms:
C.I. Direct Blue 151;Direct Lightfast Blue KU;Direct Blue 151;C.I. 24175;Direct Copper Blue 2R
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CAS No:
C.I. Direct Blue 151 Use and Manufacturing
It uses anisidine, J acid and NW acid as basic raw materials. Diazotize the anisole with sodium nitrite and sulfuric acid; neutralize the salt with sodium hydroxide J acid and NW acid. Then the diazotide J acid and NW acid salt are coupled, and finally obtained by salting out, filtering and drying. Kg/ton anisidine (100%) 162J acid (100%) 150NW acid (100%) 150 sodium nitrite 105 sulfuric acid (100%) 130 soda ash 400 sodium hydroxide (100%) 30 refined salt 1000 yuan powder 140 Taikoo Oil 7
It is mainly used for dyeing cellulose fibers such as cotton, hemp, viscose, etc., and can also be used for dyeing viscose/nylon blended fabrics. It can also be used for dyeing leather and paper. Post-treatment with copper sulfate during dyeing can improve light fastness. Post-treatment with formaldehyde can improve its fastness to washing. It has been developed to use L acid instead of NW acid to make direct copper salt blue M. The color light is slightly bluer and darker than direct copper salt blue 2R.
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