Guyon founded in 1878 is mainly active in the trading of raw industrial minerals. Our location near Paris also operates a suspension plant and together with our transportcompany SAFA we are active on the French market. Our main products are: - Magnesiumoxide, Magnesiumhydroxide, and all other magnesium compounds for several industries - Liquid Boron, Boremonoethanolamine and trace elements for fertilizers - Raw materials & additives (Zinc, Copper, Manganèse, Vitamins, Chelates...) for animal nutrition