dye|World dye variety

Name:C.I.Vat Red 35,C.I.68000

Molecular Structure: anthraquinones

C.I.Vat Red 35,C.I.68000,CAS 3737-76-6,375.38,C25H13NO3,Indanthren Red RK

Molecular Formula:C₂₅H₁₃NO₃

Molecular Weight: 375.38

CAS Registry Number:3737-76-6

Manufacturing Methods : (a) 1-Chloro-9,10-dioxo-9,10-dihydroanthracene-2-carboxylic acid in the presence of copper with Naphthalen-2-amine condensation, cyclization, (b) 1-(2-naphthyl amino)-anthraquinone-2-carbonyl chloride in 1,2,4 – Trichlorobenzene in heating; (C) 1-Nitro-9,10-dioxo-9,10-dihydroanthracene-2-carboxylic acid and Naphthalen-2-amine and arsenic trichloride in 1, 2 – Dichlorobenzene in heating; (d) 2-Aminonaphthalene-1-sulfonic acid and 1-Chloro-9,10-dioxo-9,10-dihydroanthracene-2-carboxylic acid condensation, heating (200 ~ 210 ℃) cyclization, and at the same time, remove sulfonic group.

Properties and Applications:  dark red. Slightly soluble in Pyridine , 1, 2, 3, 4 – Tetrahydronaphthalene and Xylene. In concentrated sulfuric acid to red light yellow, dilution after red precipitation; In the basic insurance powder solution for blue light red; In the acidic insurance powder solution for dark orange.

List of Suppliers:

Indanthren Red RK( Badische Anilin-und Soda Fabrik )