DIRECT SCARLET B Chemical Properties

storage temp. 

Amber Vial, Refrigerator, Under inert atmosphere

solubility 

DMSO (Slightly), Methanol (Slightly), Water (Slightly)

Colour Index 

22240

form 

Solid

color 

Very Dark Red

CAS DataBase Reference

3530-19-6

EPA Substance Registry System

C.I. Direct Red 37, disodium salt (3530-19-6)

Safety Information

HS Code 

3204.14.5000

DIRECT SCARLET B Usage And Synthesis

Uses

Direct Scarlet B is a dye used with textiles. It is a water pollutant, removed via chitin adsorption.

Preparation

4-(4-Aminophenyl)benzenamine double nitriding, first and 7-Hydroxynaphthalene-1,3-disulfonic acid coupling, again with phenol coupling, and then in contain sodium carbonate in aqueous solution of ethanol heating, air pressure,Using Chloroethane to make phenol??hydroxy ethylated?.

Properties and Applications

red. Soluble in water for red, slightly soluble in alcohol, acetone and soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid for dark purple, after diluted brown precipitation; In nitric acid solution for colourful red. The dye solution to join strong hydrochloric acid have orange brown precipitation; Add thick sodium hydroxide solution for red orange, precipitation.

DIRECT SCARLET B(3530-19-6)Related Product Information

• CHLORAZOL VIOLET N
• DIRECT RED 80
• DIRECT FAST BROWN M
• CHICAGO SKY BLUE 6B
• CHLORAZOL BLACK BH
• DIRECT PURE YELLOW 5G
• CI NO 22610
• Direct Yellow 12
• SIRIUS YELLOW GC
• DIRECT FAST YELLOW 5GL
• DIRECT FAST BROWN BX
• Trypan Blue
• DIRECT BLACK 22
• Direct Red 23
• Direct Blue 71
• DIRECT SCARLET 3B
• Direct Scarlet 4BE
• 2-Naphthol-6,8-disulfonic acid