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Direct Blue 2

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

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.

Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 4 4 2 2 2
AATCC 3 3 3 3 3

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)


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