Bismuth Trioxide is a high-density, inorganic flame retardant additive used in halogenated and halogen-free polymers. This Dibismuth trioxide enhances flame retardancy and smoke suppression (delays ignition in polymer matrices) and is highly preferred in thermoplastics, cable insulation, and coatings. Alsoo referred to as (Bismuth(III) oxide, 99.99%, Bismuth(III) oxide, 98%), it is supplied in Industrial Grade / technical grade for (glass, ceramics, and metallurgy; high-purity grade for electronics and catalysts; and pharmaceutical/cosmetic grade, which is limited for specialised formulations. We are the trusted bismuth trioxide suppliers worldwide, with reliable lead times and global supply capability.
Bismuth Trioxide is a high-density, inorganic flame retardant additive used in halogenated and halogen-free polymers. This Dibismuth trioxide enhances flame retardancy and smoke suppression (delays ignition in polymer matrices) and is highly preferred in thermoplastics, cable insulation, and coatings. Alsoo referred to as (Bismuth(III) oxide, 99.99%, Bismuth(III) oxide, 98%), it is supplied in Industrial Grade / technical grade for (glass, ceramics, and metallurgy; high-purity grade for electronics and catalysts; and pharmaceutical/cosmetic grade, which is limited for specialised formulations. We are the trusted bismuth trioxide suppliers worldwide, with reliable lead times and global supply capability.
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Industrial Chemicals
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Inorganic Chemicals
Flame Retardant
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Chemical Properties & Specifications
An irritant, But Not Classified. Reported as not meeting GHS hazard criteria.
Bismuth Trioxide acts as a synergist for halogenated polymers (PVC, ABS), enhancing flame resistance.
Replaces toxic lead oxides in optical glass, radiation shielding glass, and glazes
Used in ceramic glazes for brilliance and color development
Used in varistors, ferrites, oxygen sensors, and solid oxide fuel cells (SOFCs)
Catalyst in oxidation and polymerization reactions
Component of yellow, orange, and red pigments
Enhances optical and protective coatings
Fluxing agent in metallurgical processes
Used in manufacture of bismuth alloys
Limited use in specialized formulations as a non-toxic alternative to lead compounds
Store in cool, dry, well-ventilated area. Keep containers tightly closed to prevent contamination and moisture uptake
24 months under recommended conditions