Chemwill Asia co.,Ltd is one of the leading manufacturer  in CHINA. 

Our main production base is located in Xuzhou industry park. We produce a wide range of organics including Active pharmaceutical ingredients(APIs), Veterinary,  Indole derivatives, Aromatics, Fluorine, Boronic acids, organocatalysts, chiral building blocks, heterocyclic compounds. We are certified both to the ISO 9001 and ISO 14001 Standards, have a safety management system in place. 

Our R&D team masters core technology for process-design of target building block as well as Tailor-made fine chemicals. Our manufactory specialised in extreme temperature conditions (-100ºC to +300ºC), hydrogenations reaction under high pressure, suzuki coupling reaction, photochemical reaction, Mitsunobu reactions, enantioselective reactions and asymmetric synthesis. 

1.Client is first.

2.Credibility is the most important.

3.Quality control is our life.

4.Great sense of responsibility.

5.We will be responsible for not only our products, our clients, also the society.

The corporation's destination: we will constantly strive to supply customers with new and high-tech products and will keep the leadership in the field. 

Methyl triphenyl phosphonate bromide was a solid quaternary phosphonium salt flame retardant. At present, halogenated flame retardants are widely used organic flame retardants with excellent flame retardant performance, but when fire occurs, halogenated flame retardants will release a lot of smoke and toxic halogenated hydrogen Chemicalbook, causing secondary harm. With the promulgation of RoHs and WEEE directives, the application of organic halogenated flame retardants in electronic and electrical equipment has been restricted. Therefore, the development of high efficiency halogen-free flame retardant has become a very important topic.

Methyltriphenyl phosphine bromide can be used as a Vittich reagent to prepare chain alkenes and increase the carbon number of unsaturated carbon chains. The Yelid precursor of Wittig reaction is widely used in the synthesis of unsaturated bonds in liquid crystal materials. It is also widely used in organic synthesis. It is a good cationic phase conversion catalyst.