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Direct Red 28

Name:C.I.Direct Red 28,C.I.22120

Molecular Structure: Double azo class

C.I.Direct Red 28,C.I.22120,CAS 573-58-0,696.67,C32H22N6Na2O6S2,Congo Red,Direct Scarlet 4B,Direct Scarlet 4BE

C.I.Direct Red 28,C.I.22120,CAS 573-58-0,696.67,C32H22N6Na2O6S2,Congo Red,Direct Scarlet 4B,Direct Scarlet 4BE

Molecular Formula:C32H22N6Na2O6S2

Molecular Weight: 696.67

CAS Registry Number:573-58-0

Manufacturing Methods : commonly known as Congo Red. 4-(4-Aminophenyl)benzenamine double nitriding, and 4-Aminonaphthalene-1-sulfonic acid (2 Moore) coupled.

Properties and Applications:  yellow light red. Tan powder. Soluble in water for yellow light red solution, soluble in ethanol for orange, soluble in acetone. In the strong sulfuric acid as dark blue, diluted into shallow blue, blue precipitation. Dyes to acetic acid solution for blue purple, have red light blue precipitation; Add thick sodium hydroxide solution for yellow. This product acid resistance and sun fastness is poor. The acid, alkali is very sensitive. Cellulose fiber of dyeing, the dye absorption rate as well, a 80 ° C affinity when the largest. This article covers the gender is good, hard to sensitive. Dyeing copper ions in colored light yellow dark; Iron ion in a yellow light. Mainly used in viscose, such as cotton, wool, silk cellulose fiber dyeing and not used in printing, also can be used for biological and pulp color.

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

List of Suppliers:

Congo Red,Direct Scarlet 4B,Direct Scarlet 4BE

JinZhou Dyestuffs Plant Hebei

ABCOL Congo Red ( Abbey Color Inc. )

Atul Congo Dark Tan ( Atul Limited )

Atul Congo Red ( Atul Limited )

Bitamine Direct Congo Dark Tan( Bharat Texdyes Industries )

Bitamine Direct Congo Red ( Bharat Texdyes Industries )

Condirec Red BM (Concord Commerce Company)

Congo Red ( ellenic Dyeworks SA )

Congo Red (Monarch Dyestuffs Industries)

Congo Red ( Multicrom SA )

Congo Red ( PT Polkrik Chemicals Co )

Congo Red (Simpsons (UK) Ltd)

Congo Red(Shandong Qing Shun Chemical Co., Ltd.)

Congo Red 1031 (Sinochem Tianjin Imp Exp Corp)

Congo Red 4B(Sinochem Hebei Imp & Exp Corp)

Congo Red CH ( Golden Dyes Corpn (India) Pvt Ltd )

Congo Red GDC ( Golden Dyes Corpn (India) Pvt Ltd )

Congo Red RS ( KCA Ltd )

Direct Congo Red ( Asian Dyestuff Industries )

Direct Congo Red ( Thai Ambica Chemicals Co Ltd )

Direct Congo Red (Sinochem Ningbo Imp & Exp Corp)

Direct Congo Red (Amar Impex)

Direct Congo Red ( Day-Glo Color Corp. )

Direct Red C (Colorom SA)

Dycosdirect Scarlet 4B (Congo Red) (Sinochem Shanghai I/E Corp/Schecho PuDong Corporation)

Pamanil Red CO-28 ( Pyosa Pigments )

Red 4BE (Hangzhou Dikai Chemical Co Ltd)

Rifa Direct Congo Red GS(Rifa Industrial Co Ltd)

Ritadirect Congo Red( ritas Mensucat Boylari ve )


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