Vat Yellow GCN
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Vat Yellow GCN, also known as Vat Yellow 2, Ashlin Yellow, is a yellowish-brown powder. It is a yellow dye with good levelling properties and a particularly bright color. Vat Yellow GCN is insoluble in water and ethanol. Vat Yellow GCN is yellow when dissolved in concentrated sulfuric acid, while Vat Yellow GCN is purple when dissolved in alkaline sodium hydroxide solution.
Other name: Vat Yellow GCN
CAS NO. ：129-09-9
Molecular formula: C28H14N2O2S2
Molecular weight: 474.55
Molecular structure diagram:
Uses of Vat Yellow GCN
1) Vat Yellow GCN can be used for dyeing and printing of cotton, viscose fiber, silk and V-cotton blended fabrics, with good affinity and level dyeing.
2) Vat Yellow GCN, Vat Yellow GCN, Vat Blue GCDN, Vat Blue BCS, Vat Green FFB, Vat Green B, Vat Green 2G, etc. dye various shades of green.
3) Vat Yellow GCN is widely used in the thread manufacturing industry. It can dye various light to medium colors, such as light green, fruit green, light gray, medium gray, light brown, medium brown, and dark brown.
Production method of Vat Yellow GCN
Vat Yellow GCN uses 2,6-diaminoanthraquinone, ω-trichlorotoluene and sulfur as raw materials, and uses cuprous chloride as a catalyst. The product is condensed in molten refined naphthalene. After acid treatment, oxidation, filtration, crushing, The finished product is dried. Heat 31.6kg of 2,6-diaminoanthraquinone (100%), 70kg of ω-trichlorotoluene (100%), 13.5kg of sulfur, 0.27kg of cuprous chloride and 100kg of refined naphthalene to 185℃, condensation reaction for 6h, then When the temperature was raised to 225°C, and then naturally cooled to 180°C, 50kg of refined naphthalene was added and filtered while hot at 140°C. The filter cake is washed 2-3 times with 200kg refined naphthalene, and the filter cake is dried and crushed. The crushed filter cake is acid treated with 450 kg of industrial sulfuric acid and 4500 L of water, then filtered, and the filter cake is washed with water to neutrality. Take the neutral warm filter cake and beat it with 200kg water, then add 100kg sodium hypochlorite solution (10%), heat up to 70℃ and oxidize for 1h, adjust pH=8, filter, wash with water to neutral, dry and grind to obtain the finished product Vat Yellow GCN.