dye|World dye variety

Name:C.I.Direct Red 81,C.I.28160

Molecular Structure: Double azo class

Molecular Formula:C₂₉H₁₉N₅Na₂O₈S₂

Molecular Weight: 675.6

CAS Registry Number:2610-11-9/12237-71-7

Manufacturing Methods : 4-((4-Aminophenyl)diazenyl)benzenesulfonic acid diazo, and 7-Benzamido-4-hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications:  red. Red powder. Soluble in water for product red, soluble in soluble fiber element, slightly soluble in alcohol, insoluble in other organic solvents. The strong sulfuric acid dyes for dark blue, shallow orange brown after diluted precipitation; In nitric acid solution for colourful blue, to red light brown. The dye solution to join strong hydrochloric acid for yellow olive brown precipitation; Add thick sodium hydroxide solution has the purple precipitation. 60 ℃ in the solubility of 40 g/L, not sensitive to that fights. For colourful red light. Copper ions in dyeing color slightly turn blue, encounter iron ion colored light basic unchanged. For A class SDC classification. To dead cotton cover the gender is poorer. Cotton neutral and alkaline white are level 5, viscose and minus sex of neutral white for 4 ~ 5 levels. Used for dyeing cotton and viscose, also can be used for paper color.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
ISO	4	3	4	1-2		1
AATCC	4	3-4	4-5	1		1

List of Suppliers:

Direct Red 4B,Direct Fast Red 4B

Tianjin Yadong Group

ABCOL Direct Red 81 ( Abbey Color Inc. )

ACDI Fast Red 8 BL (Aakash Chemicals & Dyestuffs Inc)

ACDI Red 8 BL(Aakash Chemicals & Dyestuffs Inc)

Acid Leather Fast Red I4BW(CBW Chemie GmbH Bitterfeld-Wolfen)

Aizen Primula Red 4BH ( Hodogaya Chemical Co Ltd )

Ambidirect Red 8 BL ( Thai Ambica Chemicals Co Ltd )

Anadurm Red D-3B ( Albion Colours Ltd)

Apollo Direct Fast Red 5B ( Taiheung Corp )

Arid Fast Red 8BL ( Aashiana Dyestuffs Inc )

Atul Direct Light Fast Red 4B ( Atul Limited )

Atul Leather Fast Red D4BL ( Atul Limited )

Bitafast Red 5BS ( Bharat Texdyes Industries )

Classic Direct Red 81 (Classic Dyestuffs Inc)

Colozol Fast Red SBL ( Color Synth Industries Ltd )

Concorde Direct Red 5B ( I-HWA Industrial Corp )

DinamineFast Red 4BH(Dintex Dyechem Ltd)

Direct Fast Red 4B(Sinochem Ningbo Imp & Exp Corp)

Direct Fast Red 4B (Fenchem Enterprises Ltd)

Direct Fast Red 5B ( Day-Glo Color Corp. )

Direct Fast Red 8BL( KCA Ltd )

Direct Fast Red 8BL( Indo Colchem Ltd )

Direct Fast Red 8BL( Global Colors Inc. )

Direct Fast Red BBL(Classic Dyestuffs Inc)

Direct Light Red 4B( Multicrom SA )

Direct Light Red 8B( S A des Ets. Steiner )

Direct Paper Red 8BLP OCM (Classic Dyestuffs Inc)

Direct Red (Sinochem Liaoning Import & Export Corporation)

Direct Red 4B(Shandong Qing Shun Chemical Co., Ltd.)

Direct Red 5B( Sharda International )

Direct Red 5BL( Colour Industries )

Direct Red 5BL ( National Dyechem Industries )

Direct Red 5BL ( Cosmonaut. Chemicals )

Direct Red 5BL( Jagson Colorchem Ltd )

Direct Red 5BL(Classic Dyestuffs Inc)

Direct Red 8 BL( Greenwood Products Inc. )

Doramin Red 8BL( D&G Dyes Inc. )

Duasyn Direct Red 8B( DyStar GmbH & Co Deutschland KG )

Dynarect Red HA ( Dynamic Industries Ltd )

Dyrect Fast Red 2BD ( Albion Colours Ltd)

Dyrite Red 5BL ( Rite Industries Inc. )

Enianil Light Red 8BLN( Enia Industries Quimicas S.A. )

Fabramine Red 8BL ( Fabricolor Inc. )

Fast Red 4B (Sinochem Liaoning Import & Export Corporation)

Fast Red 5B ( Liberty Exports Ltd )

Goldamine Fast Red 5B ( Golden Dyes Corpn (India) Pvt Ltd )

Hariect Fast Red 5B( Bhavi International Ltd )

Helion Red 8B(Boruta – Kolor)

Hispaluz Red 8BL( S A Robama )

Incomine Red 5BL( Indokem Ltd )

Intrabond Liquid Red 5BX(Yorkshire Group pic)

Intrabond Red TG Conc Liquid (Classic Dyestuffs Inc)

Intralite Red 5B (Yorkshire Group pic)

Intralite Red 5B Extra Conc (Classic Dyestuffs Inc)

Kemanarect Red 5B( Karsandas Mavji )

Leadirect Fast Red 8BL Pdr/Liq( Leadertech Colors Inc. )

Levacell Red 4B ( Bayer Group )

Light Fast Red 4B ( KCA Ltd )

Lurantin Red 8B(Classic Dyestuffs Inc)

Multiluz Red 4B( Multicrom SA )

Nippon Kagaku Direct Paper Red 4BL( Kaseihin Kogyo Kyokai )

Orcolitefast Red 8 BL( Organic Dyestuffs Corp )

Pamasol Red 8BL-81 ( Pyosa Pigments )

Pergasol Red 2B ( Ciba Specialty Chemicals Inc )

Permalite Red 5B EX Conc ( Standard Dyes )

Permalite Red 5BL( Standard Dyes )

Permalite Red 81 100% ( Standard Dyes )

Permalite Red 8BL ( Standard Dyes )

Permalite Red AM( Standard Dyes )

Pontamine Fast Red 8BLX( Miles Inc. )

Pyrazol Fast Red 8 BLN Conc (Classic Dyestuffs Inc)

Red 4B (Hangzhou Dikai Chemical Co Ltd)

Red 5B( JK Promotions )

Red 5BL(United Chemie)

Red MV( Manuel Vilaseca SA )

Sandal Direct Red 8B( Sandal Dyestuff Industries (Pvt) Ltd )

Simrect Red 24864 (Simpsons (UK) Ltd)；

Solamine Red 4B(CBW Chemie GmbH Bitterfeld-Wolfen)

Solar Red B( Clariant GmbH )

Solius Red 4B( Frado )

Sumilight Red 4B( Sumitomo Chemical Co. Ltd )

Suprazo Red 4B( Mitsui Toatsu Chemicals Ltd )

Tertrodirect Light Red 5B(Yorkshire Group pic)

Triamin Red 8BL(Chemische Fabriek Triade BV)

Usharect Red 81( Ushanti Colour Chem Pvt Ltd )

Vicorect Light Fast Red 4BA(Victory Colour Chem Industries)

Vicorect Red ST(Victory Colour Chem Industries)