It reacts violently with water.
It forms potentially explosive mixtures with
water. When mixed with water, it generates toxic
gases, vapors, or fumes in a quantity sufficient
to present a danger to human health or to the
It is a cyanide- or sulfide-bearing waste that, when
exposed to pH conditions between 2 and 12.5, can
generate toxic gases, vapors, or fumes in a quantity
sufficient to present a danger to human health or to the
It is capable of detonation or explosive reaction
when it is subjected to a strong initiating source or if
heated under confinement.
It is readily capable of detonation or explosive
decomposition or reaction at standard temperature and
It is a known forbidden substance or a class A or
It is a material that contains or degrades into toxic
components in concentrations that poses a potential
hazard to the environment or to the public health and
that may be fatal to humans in low doses.
MARKINGS AND LABELS
To determine specific hazards at a glance, refer to
the warning markings and labels that identify
hazardous materials. Hazardous warning markings
and labels are necessary to show clearly the hazardous
nature of the contents of packages or containers at all
stages of storage, handling, use, and disposal. When
unit packages (marked packages that are part of a
larger container) are removed from shipping
containers, the continuity of the specific hazard
warning must be preserved. This is normally done by
applying the appropriate identifying hazardous label
to the hazardous material container or package.
The Department of Transportation (DOT) labeling
system shown in figure 1-7 is a diamond-shaped
symbol segmented into four parts. The upper three
parts reflect hazards relative to health, fire, and
reactivity. The lower part reflects the specific hazard
that is peculiar to the material.
There are four specific labels that are designed to
illustrate each hazard:
Figure 1-7.Hazardous Code Chart.