Methane is a colorless and odorless gas. It is not toxic; the immediate health hazard is that it may
cause thermal burns. It is flammable and may form mixtures with air that are flammable or explosive.
Methane is violently reactive with oxidizers, halogens, and some halogen compounds. Methane is an
asphyxiant and may displace oxygen in a workplace atmosphere. The concentrations at which
flammable or explosive mixtures form are much lower than the concentration at which asphyxiation
risk is significant.