sentence: Tellurium trioxide can come in two forms.
sentences_after: There is a yellow-red form and a gray form. The yellow red form is more reactive. It is a powerful oxidizing agent. It reacts with strong bases to make tellurates. It releases oxygen to turn into tellurium dioxide when heated.
concept_name: tellurium trioxide
headings: Tellurium trioxide Properties
categories: Tellurium compounds Oxides