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SECTION 1 INTRODUCTION - TM-9-1300-275-20004
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TM-9-1300-275-2 Chemical Agents and Decontaminating Procedures Manual
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SECTION 2 CHEMICAL AGENTS AND DECONTAMINATING PROCEDURES
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.
4

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