Direct Orange 44
Name:C.I.Direct Orange 44,C.I.40215
Molecular Structure: Stilbenes
C.I.Direct Orange 44,C.I.40215,CAS 12222-37-6
Molecular Formula:
Molecular Weight:
CAS Registry Number:12222-37-6
Manufacturing Methods : in reflux conditions, sodium hydroxide solution in (E)-2-(2-sulfo-4-nitrostyryl)-5-nitrobenzenesulfonic acid with 4-Aminobenzenesulfonic acid diazo with aniline coupled with heating products.
Properties and Applications: red light orange. Red brown powder. Soluble in water for golden brown, solubility of 50 g/L (60 ℃), 60 g/L (97 ℃), slightly soluble in alcohol. In the strong sulfuric acid as dark blue, orange for gold after diluted. The dye solution to join strong hydrochloric acid have yellow olive brown precipitation; With strong sodium hydroxide solution have orange precipitation. Cellulose fiber of dyeing, in 80 ℃ maximum when affinity, is suitable for the neutral, weak alkali dyeing. Hard to a little sensitive. In dyeing copper and iron ion colored light basic unchanged. Mainly used in viscose and viscose fabric dyeing and printing, printing and can be directly to white color, knitting fabric and carpet can be used. But with disperse dyestuffs used for the high temperature dyeing polyester/stick blended fabric.
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