dye|World dye variety

Name:C.I.Direct Blue 2,C.I.22590

Molecular Structure: Double azo class

C.I.Direct Blue 2,C.I.22590,CAS 2429-73-4,830.71,C32H21N6Na3O11S3,Direct Blue BH,Direct Diazo Black BH

Molecular Formula:C₃₂H₂₁N₆Na₃O₁₁S₃

Molecular Weight: 830.71

CAS Registry Number:2429-73-4

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, in alkaline conditions respectively with the 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications: dark blue. Blue gray powder. Soluble in water for deep purple to black, solubility 35 g/L (85 ℃), slightly soluble in ethanol and soluble fiber element. The strong sulfuric acid in blue, diluted red for purple; In nitric acid for brown in the light purple. The dye solution to join strong hydrochloric acid for red light purple; Add thick sodium hydroxide solution for purplish red color. For cellulose fiber dyeing, the dye absorption rate as well, in 60 ~ 80 ℃ temperature when the biggest affinity. Discharge good, after staining with chromogenic diazotization colorimetric method: use Naphthalen-2-ol show color get navy, between 2 amine with benzene show color get black. Mainly used for cotton, viscose, silk, leather and pulp color.

List of Suppliers:

JinZhou Dyestuffs Plant Hebei

Apollo Direct Black BH ( Taiheung Corp )

Atul Developed Black BT ( Atul Limited )

Bitamine Direct Diazo Black BH ( Bharat Texdyes Industries )

Black BT (Monarch Dyestuffs Industries)

Blue BH ( ellenic Dyeworks SA )

Brown M(Hangzhou Dikai Chemical Co Ltd)

Concorde Direct Black BH ( I-HWA Industrial Corp )

Diazo Black BH ( Golden Dyes Corpn (India) Pvt Ltd )

Diazo Black BH ( KCA Ltd )

Diazo Black BH-NB 125%( Global Colors Inc. )

Diazo Black GDC( Golden Dyes Corpn (India) Pvt Ltd )

Direct Black BH 125%(Classic Dyestuffs Inc)

Direct Blue Black BH ( Multicrom SA )

Direct Developed Black BT( Albion Dyestuffs Ltd )

Direct Diazo Black BT (Amar Impex)

Direct Diazo Black BT ( Sharda International )

Direct Diazo Black N(Colorom SA)

Direct Navy Blue BH( PT Polkrik Chemicals Co )

Direct Navy Blue BH ( Anilinas Americanas Versanil SRL )

Multicuer Blue BH ( Multicrom SA )

Pamanil Blue Black BH-2 ( Pyosa Pigments )

Rifa Direct Black BH (Rifa Industrial Co Ltd)

Rita direct Blue BH ( ritas Mensucat Boylari ve )

Simrect Blue 24865 (Simpsons (UK) Ltd)

Vopsider Navy Blue DN (Colorom SA)