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Direct Red 31 Dyes

Product info Type: Direct Dyes, Direct Red Dyes Product Name: Direct Red 31, Pink 12B 100% CAS No.: 5001-72-9 EINECS: 225-669-8 Molecular Formula: C32H21N5Na2O8S2 Product Description
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Product Introduction

Product info


Type: Direct Dyes, Direct Red Dyes
Product Name: Direct Red 31, Pink 12B 100%
CAS No.: 5001-72-9
EINECS: 225-669-8

Molecular Formula: C32H21N5Na2O8S2


Product Description


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Chemical Properities

Direct Red 31 Dyes is reddish brown powder. Water solubility is good, the aqueous solution is blue red, add concentrated hydrochloric acid to produce jujube red precipitate, add concentrated alkali to turn orange brown. Soluble in ethylene glycol ether, slightly soluble in ethanol, red orange, insoluble in other organic solvents. It is orange to brown in concentrated sulfuric acid and produces dark blue-red precipitate after dilution. Brown solution in concentrated nitric acid with precipitation. Insoluble in concentrated alkali; In concentrated ammonia, it is jujube red.


Application

Direct pink is the main red dye variety, which is widely used in dyeing and printing cotton and viscose fabrics, as well as silk and viscose interwoven fabrics. It has good transferability and levelness, high dyeing rate. It can also be used for dyeing silk, pVA fabrics and direct printing of silk fabrics. Used for cotton, viscose and other fiber blended fabric, silk color slightly light, wool and nylon can be dyed, diacetate fiber has color, polyester, acrylic slightly color.


FAQ:1.Are you a trade company or a manufacturer?We are a manufacturer with more than 15 years’ experience. 2.Can you provide free samples for test?Yes, of course.We can provide 20g free samples for each item 3.What is your payment term?Generally for the first cooperation our payment term is 30%T/T IN ADVANCE+70%T/T AFTER B/L COPY



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