Due to the large molecular weight of deuterium and tritium, the chemical properties of heavy water formed are still different from those of ordinary water, mainly due to its inert chemical properties and poor reactivity.
The difference in physical properties is mainly manifested in the relatively large specific gravity and high boiling point. Purified heavy water is distilled by using different boiling points.
Heavy water is toxic, and it is very toxic. If you drink heavy water, a lot of metabolism in the human body can't be carried out, which is also the difference in chemical properties.