C.I. Direct Yellow 21

CAS No.
1325-46-8
Chemical Name:
C.I. Direct Yellow 21
Synonyms
Direct Yellow 21;C.I. Direct Yellow 21;C.I.Direct Yellow 21:C.I.40045
CBNumber:
CB54758791
Molecular Formula:
Molecular Weight:
0
MDL Number:
MOL File:
Mol file

C.I. Direct Yellow 21 Chemical Properties,Uses,Production

Preparation

(E)-2-(2-sulfo-4-nitrostyryl)-5-nitrobenzenesulfonic acid sodium sodium hydroxide solution together with aniline backflow heating.

Properties and Applications

soluble in water to pure yellow, slightly soluble in ethanol for yellow. The strong sulfuric acid in red orange for, for the yellow brown after diluted, precipitation. The dye solution to join a light yellow brown hydrochloric acid precipitation; Add sodium hydroxide have orange precipitation.

Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 5 3 2 3 3-4

C.I. Direct Yellow 21 Preparation Products And Raw materials

Raw materials

Preparation Products

C.I. Direct Yellow 21 Direct Yellow 21 C.I.Direct Yellow 21:C.I.40045 1325-46-8