Vat Blue 5
Name:C.I.Vat Blue 5,C.I.73065
Molecular Structure: Indigo class
C.I.Vat Blue 5,C.I.73065,CAS 2475-31-2,577.85,C16H6Br4N2O2,Bromo Indigo,Indigo Blue 4B,Bromo Indigo 2B
Molecular Formula:C16H6Br4N2O2
Molecular Weight: 577.85
CAS Registry Number:2475-31-2
Manufacturing Methods : (a) and Acetic anhydride in the presence of Sodium acetate trihydrate in Acetic acid glacial will 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro- tetrabromide (FIAT764); (b) in the boiling Nitrobenzene with Bromine will 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro- four bromination, (C) 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro- in Chlorosulfonic acid (GP 225227) or in Sulfuryl chloride (GP 229304) and bromine reaction.
Properties and Applications: blue. Dark blue powder. Etanol and insoluble in water, soluble in Xylene, Nitrobenzene and 1, 2, 3, 4 – Tetrahydronaphthalene. Alkaline reduction leuco for yellow; Acid reduction leuco for pale yellow. In concentrated sulfuric acid to blue light green, diluted into blue, and the emergence of precipitation. Used for cotton of jig dyeing and yarn dyeing, dyeing hair blue cloth color turquoise blue. Is the important dye printing, can direct printing, also can discharge printing and resist printing. Can also be used for viscose, silk and wool dyeing, levelness and affinity are good. Can be processed into organic pigment
| Standard | Ironing Fastness | Chlorine bleach | Light Fastness | Mercerized | Oxygen bleach | Soaping | |
| Fading | Stain | ||||||
| ISO | 5 | 2 | 4-5 | 4 | 3-4 | 4-5 | 5 |
| AATCC | 5 | 2 | 4-5 | 3-4 | 4 | ||
List of Suppliers:
Arlanon Blue 2B ( Arlabs Ltd )
Avat Blue 4B ( Aashiana Dyestuffs Inc )
Bromo Indigo (Nanjing Chemicals Import and Export Corp)
Bromo Indigo 2B (Sinochem Liaoning Import & Export Corporation)
Bromo-Indigo 2B(Sinochem Hebei Imp & Exp Corp)
Bromo-Indigo 2B 8062(Sinochem Tianjin Imp Exp Corp)
Carvat Brilliant Blue 4B Pst( Carey Industries Inc. )
Convat Blue E (Concord Commerce Company)
Icho Vat Indigo Blue 4B ( Indian Chemical Industries )
Indigo Bromo 2B (Sinochem Shanghai I/E Corp/Schecho PuDong Corporation)
Indigo Bromo 2B (Brighten Colorchem BV)
Indocron Blue 2B ( Indokem Ltd )
Mitsui Tsuya Indigo 2B( Mitsui Toatsu Chemicals Ltd )
Permavat Blue BC-E( Standard Dyes )
[…] Methods : (a) in the presence of Pyridine , with Chlorosulfonic acid treatment C.I. Vat Blue 5 leuco; (b) in the Pyridine with metal (such as copper, iron, zinc, etc) and Sulfur trioxide source […]