Molecular Structure:

Product description: Direct Scarlet 4BS Name:C.I.Direct Red 23,C.I.29160 Molecular Structure: Double azo class C.I.Direct Red 23,C.I.29160, Direct Scarlet 4BS,Direct Red B,Direct Fast Scarlet 4BS,Solophenyl Scarlet RS Molecular Formula:C35H25N7Na2O10S2 Molecular Weight: 813.73 CAS Registry Number:3441-14-3 1.Properties and Applications:  red. Purple powder. Soluble in water for colourful red, solubility of 30 g/L (80 ° C), soluble in ethanol for orange, insoluble in acetone. The strong sulfuric acid was great red to product red, diluted light orange for palm. Add 10% sulfuric acid into a light blue; Add thick sodium hydroxide solution for red orange; Add 10% sodium carbonate (no change solution. Cellulose fiber of dyeing, dye devoured rate is very good, in the 80 ~ 100 ℃, affinity is the largest. Resistant to acid is very good. Copper ions in dyeing color shade darker; Iron ion in the same light. Mainly used in viscose etc of cellulose fiber dyeing, also can be used for silk, wool, paper and pulp dyeing, also can be used in the manufacture color which have pigment. Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water Fading Stain Fading Stain ISO 5 5 2-3 2 2 AATCC 5 5 2-3 4 2   2.International similar brand Atul Direct Fast Scarlet 4BS Atul Leather Scarlet D4BS Benzo Scarlet 4BS Best Direct Light Scarlet 4BS Bitamine Direct Fast Scarlet 4BS Brilliant Direct Red 4A Chrochem Direct Red 4BS Colodirect Scarlet 4BS Columbia Fast Scarlet 4BS Concorde Direct Fast Scarlet 4BS Condirec Red BC Deraiasol Red BN Dinamine Scarlet 4BS