Direct Orange 90
Name:C.I.Direct Orange 90,C.I.28660
Molecular Structure: Double azo class
C.I.Direct Orange 90,C.I.28660,CAS 5852-25-5,736.62,C33H22N8Na2O8S
Molecular Formula:C33H22N8Na2O8S
Molecular Weight: 736.62
CAS Registry Number:5852-25-5
Manufacturing Methods : aniline diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling, product to diazo, and 1-(3-Nitrophenyl)-3-carboxy-5-pyrazolone-three, and then will the nitro reduction for amino.
Properties and Applications: bright orange. Soluble in water for palm light orange, orange soluble in alcohol. In the strong sulfuric acid to red, shallow orange for diluted. The dye solution to join strong hydrochloric acid for red orange, precipitation; Add thick sodium hydroxide solution for orange brown.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| AATCC | 4 | 1-2 | 3 | 3-4 | 3-4 | ||
List of Suppliers: