Direct Red 31

Product Name: Direct Pink Red 12B


» C.I. No.: 29100

» C.I. Name: Direct red 31

» CAS No.: 5001-72-9

Product Detail

Product Tags

Direct red 31 is used for dyeing cellulose fabrics such as cotton, linen, silk and viscose, dyeing of plastics, plastic products and synthetic resins,

dyeing of silk, nylon and viscose/nylon blended fabrics, and dyeing of paper pulp. For cellulose dyeing, direct red 31 has good dye absorptivity at temperature between 60℃ and 80℃.

At the same time, direct red 31 dye also has good leveling and dyeing performance.


Direct Red 31 Specification

Direct Dyes Name: Direct Pink Red 12B

• Colour Index: C.I.Direct red 31(29100)

• CAS No.: 5001-72-9

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

Direct Red 31 Basic Information

Basic Information

Product Name

Direct Pink Red 12B

Colour Index 

C.I. Direct Red 31

Colour Index No.






Similar With Standard
           Strength 100%


Red Brown Powder .
        Moisture %≤ 2.0

Insoluble Matter %≤



Very soluble in water and alcohol

Principle of Direct Red 31 Dye:

Direct dyes have linear molecular structures of water-soluble groups such as sulfonate (-SO3H) or carboxyl (-COOH). The aromatic ring structure is on the same plane, so direct dyes have great affinity for cellulose fibers. Direct dyeing in neutral medium can be carried out directly as long as the dyes are dissolved in water.

If you want to buy direct red dyes, rhodamine pink dyes, sulphur black dyes, welcome to contact with us.


Contact person: Miss Jessie Geng

Mobilephone/Whatsapp: +86-13503270825

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