Zinc borate

CAS Number

1332-07-6

EC Number

215-566-6

What is Zinc borate?

Zinc borate (CAS 1332-07-6) is an inorganic boron-zinc compound used as a flame retardant and smoke suppressant in polymer and coating systems.

Plastics and polymer compounding: incorporated into PVC, polyolefins and engineering resins to meet fire performance standards
Coatings and intumescent formulations: enhance char yield and suppress smoke generation on treated substrates
Rubber and elastomer: added to cable jacketing and conveyor belting where sustained flame resistance is a regulatory requirement
Textile and paper treatments: flame retardancy for coated fabrics and barrier papers
It promotes char formation and inhibits combustion.

White powder in varying particle size distributions
Specifications defined by boron-to-zinc ratio and water of crystallization content
Packaging: 25 kg bags and bulk quantities

Melting Point 980 °C

Density 3.64 g/cm³

Appearance White, amorphous powder. Soluble in dilute acids; slightly soluble in water. Nonflammable.

Log P -0.292 (est)

Warning

GHS07· Irritant

H319 Causes serious eye irritation

P280 Wear protective gloves/protective clothing/eye protection/face protection.

P264+P265 Wash … thoroughly after handling.

P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help.

P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.