Antimony pentoxide

Antimony pentoxide (CAS 1314-60-9), also known as antimonic oxide, is an inorganic compound used primarily as a flame retardant synergist in polymer and textile systems.

Where is Antimony pentoxide used?

• Plastics and polymer compounding: synergist with halogenated flame retardants for fire resistance ratings in wire insulation and cable jacketing
• Textile and paper: back-coating formulations for fire safety standards in upholstery, curtains, and industrial fabrics
• Electronics: printed circuit board laminates and encapsulant resins meeting UL 94 or IEC standards
• Building and construction: flame-retardant coatings and sealants where low smoke generation is a critical specification
• In halogen-free or low-halogen systems it is preferred where coloration or surface compatibility is a concern.

Good to know: Unlike antimony trioxide, it is preferred in applications requiring a halogen-free or low-halogen approach, and in systems where coloration or surface compatibility is a concern.

Commercial specifications

• Technical and industrial purity grades
• Particle size and dispersion stability are key specification parameters for procurement and formulation