Hydrogen is not toxic.
Hydrogen is an industrial reagent. However, hydrogen has special properties. If the content of hydrogen in the air is high, it will lead to hypoxia in the air, which is harmful to human body.
If you inhale a large amount of hydrogen gas, it will spread around and swell the alveoli, causing the lungs to compress the heart like edema, making it difficult to exhale and breathe. This is very dangerous.
But at room temperature, hydrogen is relatively inactive, but can be activated with a suitable catalyst.
Hydrogen is very reactive at high temperature.
With the exception of the noble gas elements, almost all elements can form compounds with hydrogen.
Hydrides of non-metallic elements are usually called hydrogen halide, hydrogen sulfide, etc.;
Hydrides of metal elements are called metal hydrides, such as lithium hydride and calcium hydride.
In addition, hydrogen is not only an important industrial feedstock, but also the future and cleanest fuel.