Disodium 4-Amino-3-[4-[4-(1-Amino-4-Sulfonato-Naphthalen-2-Yl)Diazenylphenyl]Phenyl]Diazenyl-Naphthalene-1-Sulfonate; Direct Red 28; Solucongo; Disodium,4-Amino-3-[[4-[4-[(1-Amino-4-Sulfonatonaphthalen-2-Yl)Diazenyl]Phenyl]Phenyl]Diazenyl]Naphthalene-1-Sulfonate; Haemonorm; Haemomedical; Congazone Sodium; 1-Naphthalenesulfonic Acid, 3,3‘-[[1,1‘-Biphenyl]-4,4‘-Diylbis(Azo)]Bis[4-Amino-, Disodium Salt; Benzo Congo Red; Hemorrhagyl; Benzidinediazo-Bis-1-Naphtylamine-4 Sulfonic Acid Disodium; Sodium Salt Of Benzidinediazobis-1-Naphthylamine-4-Sulfonic Acid; C.I. Direct Red 28

Brief Introduction

Once widely used in cotton; For the dyeing of viscose, it is easy to change into blue in case of acid, and there is no appropriate treatment method to improve its wet treatment fastness. Therefore, since the advent of insoluble azo dye and direct acid resistant red 4BS, the use of this product in dyeing has decreased gradually, but it is used in papermaking industry. It can also be used as acid-base indicator, i.e. Congo red test paper, pH 0 (blue violet) - 0 (red). In addition, it is also used for biological staining and analytical reagents. It is used as an adsorption indicator for the determination of halide, thiocyanate and zinc. It is used as a chromogenic agent for the determination of thiophosphate herbicides by TLC. It is also used as a biological stain.

3-Methyl-4-{[4-({4-[(2-Methylphenyl)Amino]Phenyl}{4-[(2-Methylphe Nyl)Imino]-2,5-Cyclohexadien-1-Ylidene}Methyl)Phenyl]Amino}Benzen Esulfonic Acid

MSDS

CAS:5905-38-4

Molecular Formula:C40H35N3O3S

Alias

More Information

Pigment Blue 57; Schembl12760814; C.I.42795

Brief Introduction

C. I. pigment blue 57 is a variety with strong red light in the alkaline blue series. The liquid dispersion dosage form has high gloss, high coloring power and fluidity. It is mainly used in the toner of various printing inks to remove the brown tone of black ink and achieve the effect of increasing blackness.

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