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Direct Yellow 33

Name:C.I.Direct Yellow 33,C.I.29020

Molecular Structure: Double azo class

C.I.Direct Yellow 33,C.I.29020,CAS 6420-28-6,1054.83,C43H30N8Na4O15S2

C.I.Direct Yellow 33,C.I.29020,CAS 6420-28-6,1054.83,C43H30N8Na4O15S2

Molecular Formula:C43H30N8Na4O15S2

Molecular Weight: 1054.83

CAS Registry Number:6420-28-6

Manufacturing Methods : 2-Hydroxy-3-(4-aminobenzamido)-5-sulfobenzoic acid diazo, and a coupling m-Toluidine, then the light gasification.

Properties and Applications: red light yellow. Soluble in water for golden yellow, not soluble in alcohol. The strong sulfuric acid for quality in red, Gray light purple for diluted. The dye solution to join strong hydrochloric acid purple black sediment: add thick sodium hydroxide solution for gold orange, used for the cellulose fibre, silk dyeing, paper color.

Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 3 4 6 3-4 3

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