Carbon Monoxide (CO): This colorless, odorless gas binds to hemoglobin more effectively than oxygen, preventing adequate oxygenation of the blood. Nitrates and Nitrites: These chemicals can oxidize hemoglobin to methemoglobin, which cannot carry oxygen effectively. Aniline and related compounds: These substances can also induce methemoglobinemia, leading to cyanosis. Cyanide: This potent poison inhibits cellular respiration, preventing cells from using oxygen.
