D3 · Technical centre
I need flame retardancy without losing transparency. Can I use antimony trioxide?
Direct answer
Trioxide is a white powder and makes the compound opaque. Meta-grade sodium antimonate is available for transparent plastics.
Technical detail
Its refractive index is close to that of many plastics, helping retain transparency and colour fidelity; it is also used in paints, fibreglass resins and textiles.