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3-hydroxypyridine is a colorless acicular crystal. Soluble in alcohol and water, slightly soluble in ether and benzene。 In case of iron trichlorideRed solution, easy to decompose in the air.
Product number of 3-hydroxypyridine: YZH137 Chinese name: 3-hydroxypyridine[1] 
3-HydroxypyridineChinese alias: 3-pyridinol; 3-pyridinone; azophenone[1]English name: 3-Hydroxypyridine English alias: 3-Pyridinol; 3-Pyridone purity: > 98% CAS: 109-00-2[1]Molecular formula: C5H5NO[1]Molecular weight: 95.1[1]Molecular structure diagram: The right figure is obtained by sulfonation, alkali fusion and neutralization of pyridine. The fuming sulfuric acid was added to the drying reaction pot, and pyridine was added to the mixer, then mercury sulfate was added. Heating to 230-240 C for 13-14 H. Cool to 20 - 25 C, add ethanol, continue to cool below 5 C, precipitate crystallization. Pyridine-3-sulfonic acid was obtained by filtration. The melting point is 345 C and the yield is 62%. Sodium hydroxide and pyridine-3-sulfonic acid were added to the reaction pot and melted at 160 ~230 ~220 ~230 ~C for 4 hours. Cold to 100 C, add water to dissolve, adjust pH to 4 with 30% hydrochloric acid, concentrate under vacuum, and remove sodium chloride by filtration. The filtrate was cooled, filtered and dried by saturated sodium carbonate to adjust pH to 8-9. The crude 3-hydroxypyridine was obtained with a yield of 64%. The refined product was obtained by recrystallization of toluene with melting point of 126-128 C, content of 98% and refining yield of 80%.
3-hydroxypyridine is a colorless acicular crystal. Soluble in alcohol and water, slightly soluble in ether and benzene。 In case of iron trichlorideRed solution, easy to decompose in the air.
Product number of 3-hydroxypyridine: YZH137 Chinese name: 3-hydroxypyridine[1] 3-HydroxypyridineChinese alias: 3-pyridinol; 3-pyridinone; azophenone[1]English name: 3-Hydroxypyridine English alias: 3-Pyridinol; 3-Pyridone purity: > 98% CAS: 109-00-2[1]Molecular formula: C5H5NO[1]Molecular weight: 95.1[1]Molecular structure diagram: The right figure is obtained by sulfonation, alkali fusion and neutralization of pyridine. The fuming sulfuric acid was added to the drying reaction pot, and pyridine was added to the mixer, then mercury sulfate was added. Heating to 230-240 C for 13-14 H. Cool to 20 - 25 C, add ethanol, continue to cool below 5 C, precipitate crystallization. Pyridine-3-sulfonic acid was obtained by filtration. The melting point is 345 C and the yield is 62%. Sodium hydroxide and pyridine-3-sulfonic acid were added to the reaction pot and melted at 160 ~230 ~220 ~230 ~C for 4 hours. Cold to 100 C, add water to dissolve, adjust pH to 4 with 30% hydrochloric acid, concentrate under vacuum, and remove sodium chloride by filtration. The filtrate was cooled, filtered and dried by saturated sodium carbonate to adjust pH to 8-9. The crude 3-hydroxypyridine was obtained with a yield of 64%. The refined product was obtained by recrystallization of toluene with melting point of 126-128 C, content of 98% and refining yield of 80%.
Yancheng Huahong Chemical Co., Ltd. is located in Zhangzhuang Town, Yandu District, Yancheng City. Since its establishment in 1999, it has always pursued the high quality of its products, so all kinds of products produced have been quickly accepted by customers.
At present, our company mainly produces halogen compounds, pyridine derivatives and other organic intermediates. Most of our products are exported to Europe, America, Japan and India, and become qualified suppliers of many well-known pharmaceutical companies.
The company pays close attention to the new demands of the domestic and international markets with its keen eyes. From beginning to end, the company takes "the lowest price, the best product" as its business purpose and provides customers with perfect service.
We warmly welcome friends from all over the world to visit and discuss with us. We sincerely hope to further expand trade exchanges on the basis of mutual benefit in order to achieve common prosperity and development.