Direct Blue 145
Name:C.I.Direct Blue 145,C.I.27895
Molecular Structure: Double azo class
C.I.Direct Blue 145,C.I.27895,CAS 6227-16-3,706.66,C30H24N6Na2O8S2,Diazo Navy Blue MB
Molecular Formula:C30H24N6Na2O8S2
Molecular Weight: 706.66
CAS Registry Number:6227-16-3
Manufacturing Methods : 2-Amino-5-nitrobenzenesulfonic acid diazo, and 2-Amino-4-methylanisole coupling, product to diazo, in alkaline conditions and 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid coupling, then use the method will be reduced to amino nitro.
Properties and Applications: blue. Soluble in water for purple, slightly soluble in alcohol. The strong sulfuric acid for blue, purple precipitation after diluted. The dye solution to join strong hydrochloric acid have blue purple precipitation; Add thick sodium hydroxide solution have dark purple precipitation.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 5 | 5 | 4 | 3 | 4 | ||
List of Suppliers:
Diazo Navy Blue MB( Industria Chimica Dott )