Direct Red 112
Name:C.I.Direct Red 112,C.I.40290
Molecular Structure: Azo,Stilbenes
C.I.Direct Red 112,C.I.40290,CAS 12262-21-4
Molecular Formula:
Molecular Weight:
CAS Registry Number:12262-21-4
Manufacturing Methods : in reflux conditions (or a little take pressure), in sodium hydroxide solution (E)-2-(2-sulfo-4-nitrostyryl)-5-nitrobenzenesulfonic acid with 2-Aminobenzenesulfonic acid sodium diazotization and Naphthalen-1-amine coupled with heating products. Reaction to the different proportion of material that get different commodity dye.
Properties and Applications: dark red yellow light. Soluble in water for orange brown, slightly soluble in alcohol. The strong sulfuric acid for blue-ray in black and Gray light black, dilute for yellow brown to olive after brown. The dye solution with strong hydrochloric acid have yellow olive brown precipitation; Add thick sodium hydroxide solution for palm light orange.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4-5 | 4-5 | 5-6 | 3-4 | 3-4 | ||
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