Zinc borate

Zinc borate (CAS 1332-07-6) is an inorganic boron-zinc compound used as a flame retardant and smoke suppressant across a range of polymer and coating systems. It functions by promoting char formation and inhibiting combustion. This chemical reduces both flame spread and afterglow in finished materials. In plastics and polymer compounding, it is incorporated into PVC, polyolefins, and engineering resins to meet fire performance standards.

It allows manufacturers to achieve safety goals without relying solely on halogenated additives. Coatings and intumescent formulations use it to enhance char yield and suppress smoke generation on treated substrates. Common applications include structural steel and timber protection. Rubber and elastomer manufacturers add it to cable jacketing and conveyor belting where sustained flame resistance is a regulatory requirement.

In textile and paper treatments, it provides flame retardancy to coated fabrics and barrier papers. These materials are frequently used in construction and specialized industrial packaging applications. The product is supplied as a white powder in varying particle size distributions suited to different compounding processes. It is available in technical and flame-retardant grades for industrial use.

Product specifications are typically defined by the boron-to-zinc ratio and water of crystallization content. Packaging options generally include 25 kg bags and bulk quantities for industrial procurement.