Profile: 3N International, Inc. supplies flame retardants, friction materials, catalysts, corrosion control products, minor metals & alloys, titanium dioxide and rare earth products. Our catalyst antimony trioxide is specially designed as catalysts for many PET polymerization processes. Our antimony sulphide is a series of antimony trisulphide, which is widely used as friction additives & chemicals for fire works, matches and other industrial applications.