Linked from
The 19 pages that link to Decontamination, each with the reason it gives.
PoisoningRelated: Its value depends on the substance, route, timing, and risk of the procedure.
Mustard gasRelated: Prompt removal of mustard from skin and clothing can limit continued exposure.
Tear gasRelated: Prompt removal of contaminated clothing and rinsing can reduce continuing exposure.
CS gasRelated: Removing CS particles from skin, eyes, and clothing helps limit continued irritation.
Toxic injuryRelated: Removing an unabsorbed toxicant can limit further injury.