ISO 9001 certified supplier of boron nitride powder. Boron nitride (hexagonal) powder is a solid powder available in various grades that retains ability to lubricate in extreme cold or heat, is suited to extreme pressure applications, environmentally friendly & inert to most chemicals. Boron nitride powders feature maintenance of electrical insulating properties in vacuum conditions. Specifications of boron nitride powder depending on grade include oxygen ranging from 1.0 percent to 0.1 percent and particle size. By the way, SHENZHEN CHINARY also has been the professional supplier and manufacturer of chemicals, metals and raw materials since 1997. If you are interested in it, please kind access the website (http: //www.chinary.com.cn)