Direct Bordeaux B

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Direct Bordeaux B
Posting date : Jul 08, 2010
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32-
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Molecular formula : CAS : 3618-63-1 nature : reddish-brown powder. Dissolved in water solution was reddish brown slightly soluble in ethanol solution was orange. In sulfuric acid or hydrochloric acid solution showed a violet blue. Right cellulose fiber dyeing, dye is absorbed into the good, the temperature at 80 C ~ 100 largest affinity. Benzidine diazotization, with 4-amino-1-sulfonic acid and naphthalene J acid coupling, the salting-out, filtration, drying derived. Used mainly cotton and viscose fibers, nylon and silk viscose / Kam fabric dyeing. The pulp can be used for coloring.

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