Uploaded April 2020 | Updated September 2026, 2 hours ago

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When combustion occurs at a low temperature(or lack of Oxygen), incomplete combustion produces carbon monoxide.
It is toxic to animals that use hemoglobin as an oxygen carrier (both invertebrate and vertebrate) when encountered in concentrations above about 35 ppm.
In the United States, the OSHA limits long-term workplace exposure levels above 50 ppm.