Meanings of using toxic in English

He wanted to know if they were using toxic propellants-

The virtual reality training allows trainees to simulate the conditions of a fire - without using toxic foam.

In The Naturalist's and Traveller's Companion, he suggested using toxic metals such as mercury and arsenic to preserve natural history.

The available data indicate that the most common cases were suicide attempts and self-induced abortion using toxic substances (respectively 62.8% and 29% of all cases).