Direct Red 32
Name:C.I.Direct Red 32,C.I.35790
Molecular Structure: Multi-azo class
Molecular Formula:C53H30N10Na6O21S6
Molecular Weight: 1473.19
CAS Registry Number:33448-68-9
Manufacturing Methods : 7-Aminonaphthalene-1,3-disulfonic acid diazo, with (Phenylamino)methanesulfonic acid coupling, and then a sulfonic acid hydrolysis off base, its product (2 Moore) diazo, coupled with N,N’-bis(4-hydroxy-2-sulfonaphthalene-7-yl)urea.
Properties and Applications: blue-ray red.
Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
Fading | Stain | Fading | Stain | ||||
AATCC | 4 | 4-5 | 4 | 2 | 4 |
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