Duration of Effectiveness.

TM 9-1300-275/2

1-2.10 Duration of Effectiveness.

1-2.11 Hydrolysis.

This refers to the length of time a chemical agent is

The reaction of a chemical with water, whereby

dangerous at point of release. It depends upon inherent

decomposition of the chemical occurs. Such reaction

properties of the agent and varies with the method of

reduces the effectiveness of some chemical agents. In

dispersal, the weather, and the terrain. An escort team

others, however, the resulting product of hydrolysis may

is concerned mainly with the length of time a chemical

be in itself a poison (as with agents containing arsenic).

agent continues to present a hazard in case of

The rate of hydrolysis is the rate at which various

accidental spillage or leakage.

chemicals are decomposed by water. Therefore, it

indicates the resistance of a chemical to decomposition

1-2.10.1 A nonpersistent effect agent causes most

by water.

casualties through inhalation of its vapor. However,

some can also cause casualties through contact of liquid

on the skin.

1-2.12 Rate of Action.

1-2.10.2 A persistent agent usually causes casualties

The speed at which the body reacts to or is affected by

through contact of liquid on the skin. Some cause

the agent.

casualties by contact of vapor on the skin or by

inhalation of vapor.