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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

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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