dye|World dye variety

Name:C.I.Direct Red 101,C.I.25320

Molecular Structure: Double azo class

C.I.Direct Red 101,C.I.25320,CAS 6771-81-9,990.80,C33H22N8Na4O15S4

Molecular Formula:C₃₃H₂₂N₈Na₄O₁₅S₄

Molecular Weight: 990.80

CAS Registry Number:6771-81-9

Manufacturing Methods :  4-Nitrobenzenamine diazo, in acid conditions and 3-Amino-5-hydroxynaphthalene-2,7-disulfonic acid coupling, and then will the nitro reduction, again will create the amino nitrogen compounds for light accidentally gasification.

Properties and Applications:  blue light pink. Soluble in water for product red, soluble in ethanol. In the dark for the strong sulfuric acid, diluted Red sauce for. The dye solution to join strong hydrochloric acid for purple, have precipitation; Add thick sodium hydroxide solution for red, have precipitation.

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