E2630-CO
Rev 14.12.2020
Carbon Monoxide
A Colorless, odorless, and tasteless gas that is highly toxic. Carbon monoxide is formed as
a result of incomplete combustion of carbon-containing compounds, e.g. while operating a
furnace, an oven, or an engine when there is a limited supply of air.
Synonyms: Carbonous oxide, Carbon (II) oxide, Flue gas, Monoxide
Conversion of ppm to mg/m
3
is calculated for 25°C and 1 atm.
3
Chemical formula
CO
Molar weight
28
Relative gas density (to air)
0,97
Conversion
1 ppm= 1.15 mg/m
3
Boiling point
-191.5 °C
Low explosive limit (LEL), % vol. in air
12.5
Upper explosive limit (UEL), % vol. in air
74
Odor
odorless
Hazards
Highly toxic. Mild poisoning causes lightheadedness,
confusion, headache, dizziness, and flu-like effects.
Larger exposures can lead to toxicity of the CNS and
heart, and death. After acute poisoning, long-term
problems may occur. CO also has negative effects on a
baby if exposed during pregnancy. Chronic exposure to
low levels can lead to depression, confusion, and
memory loss.
Exposure
limits (ACGIH)
TWA
40 mg/m
3
/35 ppm
STEL
1380 mg/m
3
/1200 ppm
