Yong Thai Public Company Limited. The Group's principal activities are the manufacture and distribution of industrial chemical products such as Zirconium Silicate sold to ceramic industry, Liquid Acid sold to chemical industry, cosmetic industry and others, Catalyzer sold to waste water treatment industry, Sulphur lump sold to chemical industry, paper industry, sugar industry and ore extraction industry, Zircon Sand sold to ceramic industry and metal molding factory, Sulphur sand and powder sold to detergent and chemical industries, and Aluminium Hydroxide sold as raw material in ceramic and alum industry. Operations are carried out mainly in Thailand.