Profile: Sanmenxia Xiawei Chemical Co., Ltd. provides flotation & fine chemicals, feed additives and rubber auxiliaries. Flotation chemicals include sodium ethyl xanthate, sodium iso-propyl xanthate, sodium butyl xanthate, ethyl thiocarbamate, aerofloat sodium and cresols mixture. Ethyl thiocarbamate is used for the process of lead-sulfur mixed flotation in the ore with the main content of lead, for the process of zinc-sulfur mixed flotation in the ore with the main content of zinc, and together with butyl-xanthate for the process of floating copper & lead while depressing zinc & sulfur. It can also be used for the flotation process of common pyrite. Monomethyl fumarate is a white crystalline powder. It is used as an anti-mildew agent for food and feedstuff.