Biological agent that poses a threat to the health of living organisms.
Of or relating to biology or living organisms.
Substance directly involved in causing cancer.
Causes visible destruction or irreversible damage to living tissue or metals.
Required by organisms for normal physiological function.
Capable of sudden, violent energy release through chemical reaction.
Easily ignited and capable of burning rapidly.
Poses a physical or health risk to humans or the environment.
Lethal even in extremely small quantities.
Occurring in the natural world without human intervention.
Spontaneously emitting ionizing radiation due to nuclear instability.
Material with electrical conductivity between that of a conductor and an insulator.
Man-made or produced via industrial chemical synthesis.
Capable of causing injury or death through chemical action.
Properties describing the origin, behavior, and physiological impact of chemical substances.