Tannic acid

1. tannic acid English: Tannic acid. CAS: 1401-55-4. Alias: tannic acid; tannins gallic tannic acid tannin formula C76H52O46. The molecular weight of 1701.20 2. tannic acid Properties: yellow to brown yellow powder, exposed to the air can be black. Odorless, has a strong astringency. Combustible. Dissolved in water, ethanol, acetone, almost insoluble in benzene, chloroform, ether and petroleum ether. At 210 ~ 215 ℃ melt decomposition. A flash point of 187 ℃. Spontaneous point 526.6 ℃. 3. tannins Uses: Clarification agents, astringent agents, crude oil sweetening agents, flavoring agents; tannic acid can be used for tanning leather, manufacture of ink, paper and silk glue, boiler cleaning, etc., but also for mordant beer and wine clarity, rubber condensation agent. It can be used for printing and dyeing, metallurgy, pharmaceutical and other industries, tannic acid itself very low toxicity. Beryllium, aluminum, gallium, indium, niobium, tantalum and zirconium precipitation and gravimetric. Given the determination of copper, iron, vanadium, cerium and cobalt ratio. Proteins and alkaloids precipitant. Titration lead molybdate outside when the indicator. Mordant dyes. The tannins Packaging: 1. Industrial use: The plastic bag lined gunny bag, net weight 50kg. 2. medical use: with plastic bag, 250g. Then packed in wooden boxes, each box weighing 10kg. Packaging should be sealed and stored in a cool, dry place, avoid moisture. As a general chemical storage and transportation. Tannic acid manufacturers, food-grade tannic acid, tannic acid manufacturers are welcome to inquire Zhengzhou Kang source Chemical Products Co., Ltd. Tel: 0371-53786849 13140015558