Dye|Dye intermediates|Fluorescent Brightener|pigment dye

Name:C.I.Pigment Red 57,C.I.15850

Molecular Structure: Single azo

C.I.Pigment Red 57,C.I.15850,CAS 5858-81-1,430.34,C18H12N2O6S,Unisperse Rubine 4BA-PA,Rubine Toner,Navifast Rubine Toner

Molecular Formula:C₁₈H₁₂N₂O₆S

Molecular Weight: 430.34

CAS Registry Number:5858-81-1

Manufacturing Methods :2-Amino-5-methylbenzenesulfonic acid diazotization, and 3-Hydroxy-2-naphthoic acid coupling.

Properties and Applications:blue light red. Soluble in hot water for yellow red, not soluble in ethanol. In concentrated sulfuric acid for magenta, dilution after magenta precipitation. Pigment solution to join concentrated hydrochloric acid have brown light red precipitation; Join concentrated sodium hydroxide solution for brown.

List of Suppliers:

Covanor Red W 3633( Les Colorants Wackherr )

Covapate Red W3773 ( Les Colorants Wackherr )

D&C Red No 6 W003 ( Les Colorants Wackherr )

Global Pigment Red 57 ( Global Colors Inc. )

Navifast Rubine PBC ( Indian Dyestuffs Industries Ltd )

Navifast Rubine Toner 189B( Indian Dyestuffs Industries Ltd )

Navifast Rubine Toner 6BF ( Indian Dyestuffs Industries Ltd )

Navifast Rubine Toner PBC ( Indian Dyestuffs Industries Ltd )

Pigment Red 57 (CPMA)

Sodium Lithol Rubine (Magruder Color Company Inc.)

Unisperse Rubine 4BA-PA( Ciba Specialty Chemicals Inc )