Question

Is Methane gas poisonous?

Answer 1

Methane gas is relatively non-toxic; it does not have an OSHA PEL Standard. Its health affects are associated with being a simple asphyxiant displacing oxygen in the lungs. ... Methaneis extremely flammable and can explode at concentrations between 5% (lower explosive limit) and 15% (upper explosive limit)
Methane in its gas form is an asphyxiant, which in high concentrations may displace the oxygen supply you need for breathing, especially in confined spaces. Decreased oxygen can cause suffocation and loss of consciousness. It can also cause headache, dizziness, weakness, nausea, vomiting, and loss of coordination.