Direct Blue 151

Product Name: Direct Copper Blue 2R/Copper Blue 2R


» C.I. No.: 24175

» C.I. Name: Direct blue 151

» CAS No.: 110735-25-6

Product Detail

Product Tags

Direct copper blue 2R CI direct blue 151 is blue-black powder. It dissolves in water and shows a blue-violet solution, but it is easily soluble in alcohol and shows a red-purple color. In case of concentrated sulfuric acid, it is emerald blue, and after dilution, it is purple. Its aqueous solution is purple precipitated with concentrated hydrochloric acid, and concentrated sodium hydroxide solution is reddish purple to wine red. For dyeing cellulose fibers, the dye exhaustion is very good, and the affinity is the highest at 100 ℃. 


Direct Blue 151 Specification

Direct Dyes Name: Direct Copper Blue 2R

• Colour Index: C.I.Direct blue 151

• CAS No.: 110735-25-6

• Usage: Cotton Dyestuffs, Paper Dyestuffs, Wool Dyestuffs, Silk Dyestuffs

Direct Blue 151 Basic Information

Basic Information

Product Name

Direct Copper Blue 2R

Colour Index 

C.I. Direct Blue 151

Colour Index No.






Similar With Standard
           Strength 100%


Blue Black Powder .
        Light Fastness 2-3

Washing Fastness



Very soluble in water and alcohol

Direct Blue 151 Usage:

Direct blue 151 is mainly used for dyeing cellulose fibers such as cotton, hemp, viscose, etc., and can also be used for dyeing viscose / nylon blended fabrics, as well as leather and paper. Post-treatment with copper sulfate during dyeing can improve light fastness. Post-treatment with formaldehyde can improve its fastness to washing.

We are professional manufacturer of direct dyes, basic dyes, sulphur black and solvent red 49 for over 26 years in China. With reliable quality and good reputation, our dyes are very popular in the Pakistan, Bangladesh, Brazil, Korea, Vietnam, Afghanistan etc.


Contact person: Miss Jessie Geng

Mobilephone/Whatsapp: +86-13503270825

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