... 16ml80 °C hot water, 20ml glycerol Boiling point : 285°C Index of refraction : 1.524 Purity: ≥99.0%(GC)Flash point : Minimum ... and tannin acid.In the pharmaceutical industry, for the production of antihypertensive drug methyldopa, catechol drug L-dopa, and Katalin, ... was called as JIAXING ZHONGHUA CHEMICAL Plant.After thirty years of hard work, it has developed rapidly and improved market ...