Direct Brown 227
Name:C.I.Direct Brown 227
Molecular Structure: trisazo class
Molecular Formula:C32H24N9NaO7S
Molecular Weight: 701.65
CAS Registry Number:
Manufacturing Methods : 4-Amino-N-(4-aminophenyl)benzamide double nitriding, first coupled with 2-Hydroxybenzoic acid
, again and 4-Aminobenzenesulfonic acid diazo, in acid conditions and Benzene-1,3-diamine match-mismatch things coupled.
Properties and Applications: Red light brown.
Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
Fading | Stain | Fading | Stain | ||||
ISO | 2 | 3 | 2 | 3-4 | 2-3 |
List of Suppliers:
Direct Fast Catechine GNB ( Aziende Colon Nazionali Affini (ACNA) )