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Direct Brown 132

Name:C.I.Direct Brown 132,C.I.31505

Molecular Structure: trisazo class

C.I.Direct Brown 132,C.I.31505,CAS 8028-37-3,785.68,C25H22N11Na3O9S3

C.I.Direct Brown 132,C.I.31505,CAS 8028-37-3,785.68,C25H22N11Na3O9S3

Molecular Formula:C25H22N11Na3O9S3

Molecular Weight: 785.68

CAS Registry Number:8028-37-3

Manufacturing Methods : N-(3-aminophenyl)formamide diazo, and 3,5-Diamino-4-methylbenzenesulfonic acid coupling, hydrolysis amino acylation, product double nitriding, and 90% Benzene-1,3-diamine and  10% 2,4-Diaminobenzenesulfonic acid (2 Moore) coupled.

Properties and Applications: red light brown. Soluble in water for orange brown, soluble in ethanol for red orange brown, soluble in soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid in dark green light for blue, dilute for yellow brown after; In nitric acid in red for brown; In 10% of black light brown for sulfuric acid. The dye solution to join strong hydrochloric acid have orange brown precipitation; Add thick sodium hydroxide solution have orange brown precipitation.

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

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