毒劑

a poison / a toxic agent / poison gas / a chemical weapon

poison / to poison / poisonous / malicious / cruel / fierce / narcotics

dose (medicine)

antidote

disinfectant

organophosphorus agent

gas projectile

gas detection

decontamination

tactical mixture of chemical agents

nerve agent / nerve gas

choking agent

vesicant

lung irritant

lethal agent

quick-acting agent

systemic agent / systemic gas / systemic poison

persistent agent