Direct Fast Blue FR
Direct Fast Blue FRL
CAS: 6717-34-6
Molecular Formula: C36H22N7Na3O10S3
Direct Fast Blue FR - Names and Identifiers
| Name | Direct Fast Blue FRL |
| Synonyms | C.I.34145 C.I. Direct blue 72 Direct Fast Blue FR Diazol Light Blue B Direct Fast Blue FRL C.I.Direct Blue 72(34145) 6'-Amino-1'-hydroxy-4-[(4-phenylazo-6-sodiosulfo-1-naphthalenyl)azo][1,2'-azobisnaphthalene]-3',6-disulfonic acid disodium salt |
| CAS | 6717-34-6 |
Direct Fast Blue FR - Physico-chemical Properties
| Molecular Formula | C36H22N7Na3O10S3 |
| Molar Mass | 877.76509 |
| Melting Point | >300°C |
| Solubility | Solubility Soluble in water, ethanol |
| Appearance | powder |
| Color | Dark blue |
| pKa | 13.8(at 25℃) |
| Physical and Chemical Properties | It is soluble in water and ethanol. The aqueous solution is purple-black, and concentrated hydrochloric acid is added to produce dark blue precipitate; concentrated lye is added to produce dark purple precipitate. It is dark green and blue in concentrated sulfuric acid, and turns to sauce purple after dilution. |
Direct Fast Blue FR - References
| pH range of acid-base indicator discoloration | Blue (13.0) to violet (14.0) |
| Main application | Coloring paper |
| Use | direct light-resistant blue FRL is mainly used for dyeing and printing of cotton, viscose fiber and silk fabrics, also used for the coloring of paper. used for dyeing cotton, viscose, silk and other fabrics |
| production method | with aniline, 5-amino-2-naphthalenesulfonic Acid (1, 6-cleve's Acid, 1, 6-cliffic acid), J acid as raw material, first diazotization of aniline, coupling with 1, 6-cliffic acid, and then diazotization of the coupling product, with another molecule 1, the 6-cliffic acid was coupled, and the coupling product was diazotized again, and coupled with J acid to give the product. After salting out, filtration, drying, grinding to get the finished product.. |
Last Update：2024-04-10 22:29:15
