Color of Post-Moem staining in some poisons Poison Color Carbon monoxide (CO) Cherry red Carbon dioxide (CO2) Deep blue (reducedhemoglobin) Cyanide Bright red/pink Phosphorus or copper Dark brown/yellow Hydrogen sulfide Bluish green Opiates Black Nitrites, aniline, nitrobenzene,chlorates (methemoglobinformation) Chocolate or coffee-brown Smell due to various poisons Poison Odor Phosphorus, heavy metal poisoning(arsenic, selenium, thallium), parathion,malathion, alphos Garlic-like Ethanol, methyl or propyl alcohol,chloroform, nitrites, acetone Sweet and fruity Paraldehyde, chloral hydrate Acrid H2S, mercaptans, disulfirum Rotten eggs HCN Bitter almond Carbolic acid Phenolic Organophosphates Kerosene-like Zinc phosphide Fishy Methyl salicylates Oil of wintergreen Marijuana Burnt rope, hemp Ref - Krishan Vij 5th edition pg: 123 ,504,538