professional herbal extract
Shanghai Worldyang Chemical Co., Ltd. is located in Putuo District, Shanghai, China. Our company is committing itself to the fine chemical products manufacturing and supplying. We have factories and R&D branch in Jiangsu, Shangdong and Zhejiang Provinces.
Our company, relying on two well-know universities in Shanghai as technical support, puts a high value on product research and development. Principal investigator of the R&D center, who graduated from Shanghai Medical University,has been awarded two doctoral degrees,one in Shanghai Medical University anf the other in France.


>Pyridine Chemistry

Pyridine and its derivatives are more stable than benzene and their reactivity is similar to that of nitrobenzene. A typical aroma

>Pyridine Aromaticity

The structure of pyridine is very similar to that of benzene. The carbon-carbon bond in the pyridine molecule is 139 pm, which is


Shanghai Worldyang Chemical Co., Ltd has gotten ISO