Methane (CH₄)
CAS Number:
74-82-8
Methane (CH₄) is a colorless, odorless, highly flammable gas that is the primary component of natural gas. It is a simple asphyxiant — not toxic in itself, but dangerous because it displaces oxygen in enclosed spaces. Methane is the leading cause of explosive atmospheres in coal mines, landfills, sewers, agricultural biogas facilities, and natural gas infrastructure. The gas has a flammable range of 5–15% in air (LEL 5%, UEL 15%). Its presence is typically detected using LEL/combustible gas sensors. Methane is also a potent greenhouse gas and its monitoring is increasingly important for environmental compliance and emissions reporting.
Methane (CH₄) is a colorless, odorless flammable gas and the primary component of natural gas. Rent methane detection equipment from RAECO Rents to support confined space entry, landfill monitoring, and natural gas leak investigations where combustible gas buildup is a concern. All rental instruments are bump tested before each rental so crews can confirm sensor response before heading into the field.
Regulatory Exposure Limits
As of March 09, 2026
OSHA PEL
TWA:
No established PEL
STEL:
N/A
C:
N/A
NIOSH REL
TWA:
No established REL
STEL:
N/A
C:
N/A
ACGIH TLV
TWA:
No established TLV
STEL:
N/A
C:
N/A