Acid Red 66
Name:C.I.Acid Red 66,C.I.26905
Molecular Structure: Double azo class
C.I.Acid Red 66,C.I.26905,CAS 4196-99-0,556.48,C22H14N4Na2O7S2,Acid Red S,Red 3B,Acid Scarlet B
Molecular Formula:C22H14N4Na2O7S2
Molecular Weight: 556.48
CAS Registry Number:4196-99-0
Manufacturing Methods : 3,4′-Disulfo-4-aininoazobenzene diazo, and Naphthalen-2-ol coupling.
Properties and Applications: yellow light red. Soluble in water for orange red, slightly soluble in ethanol and soluble fiber element, insoluble in other organic solvents. In the dark for the strong sulfuric acid, diluted for orange red, then have a brown precipitation. In nitric acid solution for blue, then into amber color. In water solution to join strong hydrochloric acid have red precipitate; Add thick sodium hydroxide solution have yellow brown precipitation.
| Standard | Light Fastness | Soaping | Persperation Fastness | Oxygen bleaching | Fastness to seawater | |||
| Fading | Stain | Fading | Stain | Fading | Stain | |||
| ISO | 3-4 | 3-4 | 3 | 5 | ||||
| AATCC | 4 | 4 | 2 | 3 | 1 | 4 | ||
List of Suppliers:
ABCOL Red 3B Cone. ( Abbey Color Inc. )
Acid Red S (Simpsons (UK) Ltd)
Acid Scarlet B ( National Dyechem Industries )
Atlantic Acid Scarlet BA(Classic Dyestuffs Inc)
Biebrich Scarlet(Simpsons (UK) Ltd)