Acute toxicity includes headache, nausea, dizziness, weakness, confusion, hallucinations, and more. While experiencing these symptoms, the reaction to your blood will cause the blood flow to decrease resulting in lower pulse and respiratory rates. Moderate symptoms progress from acute symptoms, leading to collapsing and unconsciousness. In severe cases, after a certain amount of exposure over time, moderate symptoms turn into death.

Exposure and concentrations also depend on the type of side effect you initially experience. Prolonged exposure to a concentration of 50 parts per million (ppm) results in acute symptoms. But several hours of exposure at a concentration level of 100ppm leads to moderate effects, and short-time exposure to 5000ppm is lethal.

CO gas is also highly flammable, presenting as dangerous fire and explosion risk. Storage of carbon monoxide gas should be far from areas where fire or ignition sources are present. Vapors from liquified CO gas are heavier than air and travel along the ground to ignition sources, increasing the risk of a fire or explosion. Explosive environments occur when it mixes with air in a volume range of 12.5-74%