CH4
METHANE
Primarily used to produce light and heat, methane (CH4) is a colourless, highly flammable gas that is the principal component of natural gas, also referred to as biogas.
Methane is a greenhouse gas, which is encountered in normal atmospheric conditions at a rate of approximately 2.2 parts per million (ppm). Methane also occurs naturally in wetland areas through the anaerobic decomposition of animal and plant matter.
Methane is used in many industries, including the making of pulp and paper, food and beverage, and petroleum refining, and it can be stored and/or transported under pressure as a liquid-gas. Due to its flammability, methane gas should be monitored in enclosed or underground spaces, to mitigate risk of combustion. It also poses the danger to life due to asphyxiation, as it displaces oxygen.
Colourless and odourless
Highly flammable
Non-toxic, but can displace oxygen
Natural gas component
Potent greenhouse gas
More about METHANE
Hazard | Highly flammable, asphyxiant in enclosed spaces |
Classification | Flammable gas |
Exposure limits | (OSHA) PEL\TWA: No specific limit (considered an asphyxiant) |
Industries present | Natural gas production, coal mining, agriculture (livestock), landfills |
Health effects | Asphyxiation in confined areas, no direct toxic effects at normal levels |
Environmental impact | Potent greenhouse gas, contributes to global warming |
Duration in air | Can remain in the atmosphere for approximately 9 to 12 years |
Methane is highly flammable and can ignite at a relatively low temperature. It is combustible, and if pressurised it also poses an explosion risk at concentrations levels of between 5% and 15%.
High exposure to methane can reduce the amount of oxygen inhaled, resulting in mood changes, slurred speech, vision problems, memory loss, nausea, vomiting, facial flushing and headaches. In severe cases, there may be changes in breathing and heart rate, balance problems, numbness, and unconsciousness. With extremely high or continuous exposure, methane can kill.
In cases of eye contact, immediately flush the eye with large amounts of water for a minimum of 15 minutes. For skin contact, immerse the affected area in warm water and seek medical attention.
In cases of methane inhalation remove the person from exposure and begin rescue breathing if breathing has stopped, and CPR if the heart has stopped. Seek medical attention as soon as possible.
How to detect methane
Need some expert advice?
The team here at Crowcon are industry leaders in gas detection, and between us have decades of experience working with and around gases like methane. If you want advice on gas detection and safety, a member of our team is always on hand to walk you through the best resources and advice to keep you, your site, and your personnel safe.
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