ZINC AND FLAME RETARDANT

Zinc Borate is a flame retardant.
Source:  http://www.ctechcorporation.com/zincborate.htm

Zinc Hydroxystannate is a flame retardant.
Source:  http://www.aluminahydrate.com/zinchydroxy.html

GREAT LAKES CHEMICAL CORPORATION (CHEMTURA) AND THE PATHFINDERS CAMP