It is a white powdery solid. It reacts with acids to produce stannic salts, such as tin(IV) chloride with hydrochloric acid. It reacts with strong bases to make stannites. It reacts with carbon at a high temperature to make tin metal.
It can be made in pure form by burning powdered tin in air.
- Sn + O2 → SnO2
It is used to detect carbon monoxide. It is also used as a catalyst for certain reactions. It is also used to make ceramics opaque (not clear). It is used in sensors of gases that can burn. A tin(IV) oxide wire is heated. When a flammable gas flows over it, it can conduct a little electricity. The sensor measures the electricity.