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Hangzhou Emperor Chemical Co., Ltd.

Direct Red 31, Paper Dye, Direct Red 12b manufacturer / supplier in China, offering Paper Dye Direct Red 31 Direct Red 12b, Direct Dyes Violet 9 for Paper Dyeing, Direct Dyes Yellow 147 for Paper Dyeing and so on.

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Supplier Homepage Product DIRECT DYE Paper Dye Direct Red 31 Direct Red 12b

Paper Dye Direct Red 31 Direct Red 12b

FOB Price: US $2.65-5.29 / kg
Min. Order: 100 kg
Min. Order FOB Price
100 kg US $2.65-5.29/ kg
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Port: Shanghai, China
Transport Package: 25kg/Drum, Carton Box, Bag
Payment Terms: L/C, T/T, Western Union

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Basic Info
  • Model NO.: Direct Red 31
  • Appearance: Powder
  • Name: Direct Red 12b
  • C.I.No.: Direct Red 31
  • Origin: China
  • Colour: Red Purple Powder.
  • Usage: Paper, Textile, Viscose, Silk, Wool
  • Content: 100%
  • Trademark: Emperor
  • HS Code: 3204140000
Product Description
Product Name: Direct Red 31
C.I. No.: 29100
CAS No.: 5001-72-9
Molecular Formula: C32H21N5Na2O8S2
Molecular Weight: 713.65
Relative Name:
Direct Red 12B,Direct Fast Pink,Direct Pink 12B,Direct Pink 5B.
Shade: colourful red blue light. Red brown powder
Direct Red 31 Physical Properties and light fastness, solubility.
Direct Red 31
Dyeing depth %2
Insolubles %0.15
Light Fastness2
Washing Fatness3
Rubbing fastness(dry)4-5
Rubbing fastness(wet)2

Direct Red 31 Properties and Applications:
Soluble in water for product red solution, the solubility of 45 g/L (80 ºC), also can dissolve in fiber element solution, slightly soluble in alcohol for red orange, insoluble in other organic solvents. The strong sulfuric acid in orange to red light for brown, diluted dark blue light red precipitate generated; In nitric acid solution for orange brown, precipitation. The dye solution to generate strong hydrochloric acid purplish red precipitate; Add thick sodium hydroxide solution for orange brown. Copper ions in dyeing dim light; Iron ion in micro have change. Mainly used in viscose, such as cotton, silk, polyamide fiber cellulose fiber and viscose/silk blended fabric dyeing, can be used for pulp shading.
Note: The data contained here are based on our current knowledge and experience. It is the responsibility of user to test our products before the final application.
Paper Dye Direct Red 31 Direct Red 12b

Paper Dye Direct Red 31 Direct Red 12b
Paper Dye Direct Red 31 Direct Red 12b
Paper Dye Direct Red 31 Direct Red 12b
Paper Dye Direct Red 31 Direct Red 12b

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