Lonza(site info)
Develops, manufactures and markets a broad range of complex fine chemicals, polymers, additives and chemical specialties
http://www.lonza.com/
5.
Lorad Chemical Corporation(site info)
Manufacturer of advanced inorganic chemicals serving both R and D and bulk requirements in a diverse range of industries and applications. Products include: oxides, sulfides, fluorides, borides, carbides, nitrides and silicides.
http://www.loradchemical.com/