BurnEx Plus A1588LP and BurnEx Plus A1590 are powders made by spray drying aqueous solutions of colloidal antimony pentoxide. A1588LP and A1590 have acidic surfaces and they are free-flowing agglomerates about 10-30 microns in size.

BurnEx Plus A1588LP and BurnEx Plus A1590 are designed for flame retardant applications where a powder form of antimony pentoxide is preferred over liquid forms. Antimony oxide flame retardant synergists are always used with a source of halogen such as organic bromine and/or chorine materials. Antimony pentoxide will absorb metallic impurities in epoxy used in electronic applications and improve long term performance.