dye|World dye variety

Name:C.I.Direct Black 19,C.I.35255 Molecular Structure: Multi-azo class Molecular Formula:C34H27N13Na2O7S2 Molecular Weight: 839.77 CAS Registry Number:6428-31-5

Name:C.I.Direct Black 17,C.I.27700 Molecular Structure: Double azo class Molecular Formula:C24H21N6NaO5S Molecular Weight: 528.52 CAS Registry Number:2945-96-2

Name:C.I.Direct Black 15,C.I.22620 Molecular Structure: Double azo class Molecular Formula:C34H25N6Na3O11S3 Molecular Weight: 858.76 CAS Registry Number:6426-75-1

Name:C.I.Direct Black 14,C.I.30345 Molecular Structure: trisazo class Molecular Formula:C38H24N9Na3O13S3 Molecular Weight: 979.82 CAS Registry Number:4656-30-8

Name:C.I.Direct Black 13,C.I.30025 Molecular Structure: trisazo class Molecular Formula:C28H20N10Na2O9S2 Molecular Weight: 750.63 CAS Registry Number:71902-05-1