Substances in this class may be corrosive to metals such as aluminum,
zinc, and tin but not to iron or steel, while others are corrosive to
all metals. Some of these substances may even corrode glass.
Water can also affect some substances by making them more corrosive,
by liberating gases, and in a few cases by generating heat.
In view of these different properties, the process Of packing,
stowage, and segregation is extremely important. Class 8 substances
are divided into three packaging groups (with packaging group I being
the most dangerous).
The Introduction to Class 8 gives detailed
information on the types of packaging to be used.
Most fires involving corrosive substances can be put out by any
extinguisher, including water.
Those substances which are also
inflammable should be dealt with in the same way as substances in
Class 3 of the IMDG code.
Care must also be taken in view of the
high risk of poisoning through breathing harmful fumes.
Class 9 - Miscellaneous Dangerous Substances
This class includes substances and articles which, for various
reasons, do not fall within any of the other classes. Because of the
varied properties and characteristics in this class, the individual
schedules which usually include detailed information on stowage and
segregation need not be labeled; therefore, no label is provided for
Products of this class include aerosols, some ammonium
nitrate fertilizers, asbestos, safety matches, and pollutants.
IMDG CODE GENERAL INDEX
All substances and articles which appear in the IMDG code are listed
in the general index of the IMDG code which gives the product's UN
number; emergency schedule number (EmS no.); Medical First Aid Guide
table number (MFAG table no.); and the IMDG code and page number of
the individual schedule.
By looking up the substance or article in the General Index, you can
readily find the appropriate emergency schedules or Medical First Aid
You will need this information to know not only what
first aid measures and safety precautions to take when handling
various hazardous class substances, but also to know how to contact
emergency response personnel if a spill or leak of a hazardous
substance occurs (whether at sea or on land). Also, you need to be
aware of all required safety precautions you must take because AR
700-14 states that all Army personnel will be informed of the safety
hazards involved in processing hazardous waste.