Home > Dyestuffs and Pigments > Dyestuff > Disodium,(3E)-4-Oxo-7-[[(6E)-5-Oxo-6-(Phenylhydrazinylidene)-7-Sulfonatonaphthalen-2-Yl]Amino]-3-(Phenylhydrazinylidene)Naphthalene-2-Sulfonate###Direct Red 31 Manufacturers > Disodium,(3E)-4-Oxo-7-[[(6E)-5-Oxo-6-(Phenylhydrazinylidene)-7-Sulfonatonaphthalen-2-Yl]Amino]-3-(Phenylhydrazinylidene)Naphthalene-2-Sulfonate###Direct Red 31

Disodium,(3E)-4-Oxo-7-[[(6E)-5-Oxo-6-(Phenylhydrazinylidene)-7-Sulfonatonaphthalen-2-Yl]Amino]-3-(Phenylhydrazinylidene)Naphthalene-2-Sulfonate

CAS NO.： 5001-72-9

FOB Price： NEGOTIABLE Get Latest Price

Specification： 99.0%

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Lead Time： 14-30 days

Max Capacity： -

Packing： 25KG/Iron Drum

Product Detail

Properties

Direct red 31

Product Name:	Direct red 31
CAS RN：	5001-72-9
Alias:	Direct pink 12B
explain:	It is mainly used for dyeing cellulose fibers such as cotton and viscose. It can also be used for dyeing silk, wool, paper and pulp.
packing:	25kg or 40kg iron drum.

Properties

Direct peach red is the main red dye, which is widely used in the dyeing and printing of cotton and viscose fabrics, as well as silk and viscose interwoven fabrics. It has good migration and levelness, and high dye uptake. It can also be used for direct printing of silkworm silk, vinylon fabric and silk fabric. When it is used for blending cotton, viscose and other fibers, the color of silk is slightly lighter, wool and nylon can be dyed, diacetate fiber is stained, and polyester and acrylic fiber are slightly stained.

CAS No.

5001-72-9

Formula

C32H21N5Na2O8S2

Molecular Mass

713.64700

Exact Mass

713.06300

PSA

233.09000

Logp

10.02140

IUPAC

disodium;4-hydroxy-7-[(5-hydroxy-6-phenyldiazenyl-7-sulfonatonaphthalen-2-yl)amino]-3-phenyldiazenylnaphthalene-2-sulfonate

Matter Classification

organic

Category

Appearance

Reddish brown powder. The water solubility is good. The aqueous solution is blue red. Add concentrated hydrochloric acid to produce jujube red precipitation, and add concentrated alkali to turn orange brown.

HS Code

0.0

UN No.

0.0

DG-Class

0.0

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