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必应染料-您身边的染料专家

Direct Yellow 21

Name:C.I.Direct Yellow 21,C.I.40045

Molecular Structure: Stilbenes

Molecular Formula:

Molecular Weight:

CAS Registry Number:1325-46-8

Manufacturing Methods : (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

List of Suppliers:

Diphenyl Citronine G( Geigy Co. Ltd )


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