Vat Red F 3B

Take 1-aminoanthraquinone-2-carboxylic acid (2-anthraquinonecarboxylic acid, 1-amino) as the raw material, in dichlorobenzene medium, after amideification with thionyl chloride, condensed with hydrazine hydrate, and then smoked Sulfuric acid ring closed to get the product. After filtering, crushing and drying, the finished product is obtained. In a 2000mL four-necked flask, add 1870g dichlorobenzene, 93.5g 1-aminoanthraquinone-2-carboxylate, 55.5g thionyl chloride (industrial product, 90%) and 1.5g dimethylformamide, and slowly heat up At 95°C, a large amount of hydrogen chloride gas is produced and discharged. Incubate the reaction at 95-100°C for 2h until the reaction solution is transparent. Dry air is then bubbled in to discharge a large amount of sulfur dioxide and hydrogen chloride gas, and unreacted thionyl chloride is also steamed out at the same time, until the test paper is wetted with potassium permanganate solution to determine that there is no sulfur dioxide in the air flow (the test paper does not fade). Then the reaction solution was cooled to 30°C, and 8 g of ethanol (industrial product) was added dropwise within 5 minutes to decompose the remaining refined sulfone chloride. Then drop 83g of 10% hydrazine hydrate in ethanol solution, drop it in 1h, add sodium bicarbonate aqueous solution (prepared with 35g sodium bicarbonate and 350mL water) every 5-10min after dripping, keep at 30℃ for 6h, and measure the pH at any time Value and keep it as 8-9. Filter after the reaction (the filtrate is used for recovery of dichlorobenzene). Place the filter cake in a 2000mL round-bottomed flask, add 800mL water and 10g sodium carbonate, perform steam distillation until the dichlorobenzene is evaporated, and filter while hot. Wash it with hot water until it is neutral and dry it to get a reddish brown product. Add 1000g of 4% oleum and 50g of the above-mentioned "dihydrazine" in a 1000mL four-necked flask. At this time, the internal temperature will automatically rise to about 50℃. After stirring for 15 minutes, the "dihydrazine" will be completely dissolved, and then slowly rise to the temperature within 30 minutes. Keep the temperature at 80-85°C for 1 hour, then cool to 30°C, slowly drop 410g of water with a dropping funnel, maintain the temperature not to exceed 40°C, until the acidity of the material is 72%. Continue to cool to 30°C, filter, wash the filter cake with hot water to neutrality, dry, and pulverize to obtain 38-40g of product.

Reduced red F3B is suitable for cotton fiber dyeing and cotton cloth printing, with good levelness and affinity. It is also used to dye silk and cotton. It is also used to fight gray or brown with red light.

Molecular Weight:512.5
XLogP3:4.7
Hydrogen Bond Donor Count:2
Hydrogen Bond Acceptor Count:9
Rotatable Bond Count:2
Exact Mass:512.11206962
Monoisotopic Mass:512.11206962
Topological Polar Surface Area:159
Heavy Atom Count:39
Complexity:970
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes