Sodium antimonate is indeed utilized as a fire retardant in various materials due to its ability to suppress the spread of flames and reduce the combustibility of substances. Here’s how it works and where it’s commonly applied:

Mechanism of Action

Sodium antimonate works as a fire retardant by releasing water vapor and carbon dioxide when exposed to heat. These gases dilute the flammable gases produced during combustion, reducing the concentration of oxygen available for the combustion process and suppressing the fire. Additionally, sodium antimonate can act as a physical barrier, insulating the material and slowing down the transfer of heat.

Applications of Sodium Antimonate as fire retardant


Sodium antimonate is commonly used as a fire-retardant additive in various types of plastics, including polyethylene, polypropylene, polystyrene, and polyvinyl chloride (PVC). By incorporating sodium antimonate into plastic formulations, manufacturers can enhance the fire resistance of plastic products such as electrical enclosures, cables, and building materials.


Fire-resistant textiles, such as curtains, upholstery fabrics, and protective clothing, often contain sodium antimonate as a fire retardant additive. Treating textiles with sodium antimonate can improve their resistance to ignition and slow down the spread of flames in case of fire.


Sodium antimonate can be included in fire-retardant coatings and paints applied to surfaces such as walls, ceilings, and structural elements in buildings. These coatings help to reduce the flammability of the underlying materials and enhance the fire safety of the structure.


In rubber products, such as tires, conveyor belts, and seals, sodium antimonate can be incorporated as a fire retardant to mitigate the risk of ignition and flame spread during operation.

Adhesives and Sealants

Sodium antimonate may also be used in the formulation of fire-retardant adhesives and sealants applied in construction, automotive, and aerospace industries to improve fire safety.