Acid Red 8
Name:C.I.Acid Red 8,C.I.14900
Molecular Structure: Single azo class
C.I.Acid Red 8,C.I.14900,CAS 4787-93-3,480.42,C18H14N2Na2O7S2,Scarlet 3R,Fast Scarlet A
Molecular Formula:C18H14N2Na2O7S2
Molecular Weight: 480.42
CAS Registry Number:4787-93-3
Manufacturing Methods : 2,4-Dimethylbenzenamine diazo, coupled with 4-Hydroxynaphthalene-2,7-disulfonic acid.
Properties and Applications: colourful red yellow light. Soluble in water for product red, slightly soluble in ethanol for orange, almost insoluble in acetone. The strong sulfuric acid for product red, diluted for pink. In water solution to join strong hydrochloric acid for product red; By adding concentrated sodium hydroxide solution was time
| Standard | Light Fastness | Soaping | Persperation Fastness | Oxygen bleaching | Fastness to seawater | |||
| Fading | Stain | Fading | Stain | Fading | Stain | |||
| ISO | 5 | 2-3 | 2-3 | 2-3 | 3 | 2 | ||
List of Suppliers:
Scarlet 3R(United Chemie)
Sumitomo Fast Scarlet A ( Kaseihin Kogyo Kyokai )