Antimony trioxide (Sb₂O₃) is insoluble in water. This means that it does not react with water to form new products.

Therefore, the products of the reaction between antimony trioxide and water are:

* Antimony trioxide (Sb₂O₃) remains as a solid.

* Water (H₂O) remains as a liquid.

There is no chemical reaction that occurs between these two substances.