 Home > Encyclopedia > Direct Red 31

Direct Red 31

Direct Red 31 structure

CAS No:
5001-72-9
Formula:
C32H23N5O8S2.2Na
Chemical Name:
Direct Red 31
Synonyms:
2-Naphthalenesulfonic acid,7,7′-iminobis[4-hydroxy-3-(2-phenyldiazenyl)-,sodium salt (1:2);C.I. Direct Red 31,disodium salt;C.I. Direct Red 31;2-Naphthalenesulfonic acid,7,7′-iminobis[4-hydroxy-3-(phenylazo)-,disodium salt;C.I. 29100;Aizen Direct Rhoduline Red BH;Amanil Rhoduline Red B;Atlantic Brilliant Red 12B;Atul Direct Red 12B;Azine Fast Red 12BK;Belamine Fast Pink G;Belamine Red 12B;Benzanil Rose B;Benzo Rhoduline Red B;Benzo Rhoduline Red BA-CF;Chloramine Rose B;Chlorazol Rose B;Colonal Red 7B;Cresotine Pink 3B;Diacotton Rhoduline Red B;Diamine Rhoduline Red B;Diaphtamine Red 12B;Diazamine Fast Purpurine;Diazol Rose R;Direct Brilliant Red B;Direct Pink 3B;Direct Pink EG;Direct Red M 12B;Direct Red 12B;Direct Red 31;Direct Rhoduline Red B;Direct Rose RW;Direct Safranine RW;Enianil Fast Brilliant Red 12B;Erie Brilliant Red 12B;Fenamin Red B;Kayaku Direct Rhoduline Red B;Libia Red 12B;Mitsui Direct Brilliant Red B;Nippon Fast Red BB;Phenamine Rhoduline Red B;Pink 12B;Pontamine Red 12B;Tertrodirect Pink DR;Vondacel Red 12B;Direct Pink 12B
Categories:
Dyes and Pigments > Dye

Request for Quotation

Direct Red 31 Basic Attributes

Molecular Weight：

713.64738

Exact Mass：

713.062683

EC Number：

225-669-8

Characteristics

PSA：

233.09000

XLogP3：

10.02140

Drug Information

MeSH Entry Terms：

C.I. 29100

Direct Red 31 Use and Manufacturing

Methods of Manufacturing

Using J acid (2-amino-5-naphthol-7-sulfonic acid) and aniline as raw materials, first condense two molecules of J acid to obtain bis J acid, then diazotize the aniline, and then couple with bis J acid to obtain the product . After salting out, filtering, drying and crushing, the finished product is obtained.

Uses

Direct pink is the main red dye variety, widely used in dyeing and printing cotton and viscose fabrics, and also used in silk and viscose interwoven fabrics. It has good dye transfer and level dyeing, and high dyeing rate. It can also be used for direct printing of dyed silk, vinylon fabric and silk fabric. When used in cotton, viscose and other fiber blended fabrics, the silk is slightly lighter in color, the wool and nylon can be dyed, the diacetate fiber is stained, and the polyester and acrylic are slightly stained.

Manufacturing Info：

2-Naphthalenesulfonic acid, 7,7'-iminobis[4-hydroxy-3-(2-phenyldiazenyl)-, sodium salt (1:2): ACTIVE

Computed Properties

Molecular Weight:713.7
Hydrogen Bond Donor Count:3
Hydrogen Bond Acceptor Count:13
Rotatable Bond Count:6
Exact Mass:713.06269356
Monoisotopic Mass:713.06269356
Topological Polar Surface Area:233
Heavy Atom Count:49
Complexity:1200
Covalently-Bonded Unit Count:3
Compound Is Canonicalized:Yes

Recommended Suppliers of Direct Red 31

Shandong Airuike Chemical Co., Ltd. Contact Supplier

CN
3 YRS

Business licensed

Trader Supplier of api,Intermediates,Organic Chemistry,Inorganic Chemistry,Daily Chemicals,Cosmetic Raw Materals,CATALYST AND AUXILIARY,FLAVORS AND FRAGRANCES,Chemical Pesticides,ADDITIVE

Direct Red 31

Unit Price: $1 /KG EXW

CAS No.: 5001-72-9

Grade: pharmaceutical grade

Content: 99%

Inquiry