Pipeline and Haz. Matls. Safety Admin., DOT

Subpart B - Table of Hazardous
Materials and Special Provisions
Section 172.101 Purpose and use of hazardous materials table.
(a) The Hazardous Materials Table
(Table) in this section designates the
materials listed therein as hazardous
materials for the purpose of transportation of those materials. For each
listed material, the Table identifies the
hazard class or specifies that the material is forbidden in transportation, and
gives the proper shipping name or directs the user to the preferred proper
shipping name. In addition, the Table
specifies or references requirements in
this subchapter pertaining to labeling,
packaging, quantity limits aboard aircraft and stowage of hazardous materials aboard vessels.
(b) Column 1: Symbols. Column 1 of the
Table contains six symbols ( -  +  - ,  - A - ,
 - D - ,  - G - ,  - I -  and  - W - ) as follows:
(1) The plus (+) sign fixes the proper
shipping name, hazard class and packing group for that entry without regard
to whether the material meets the definition of that class, packing group or
any other hazard class definition. When
the plus sign is assigned to a proper
shipping name in Column (1) of the
Section 172.101 Table, it means that the material is known to pose a risk to humans.
When a plus sign is assigned to mixtures or solutions containing a material where the hazard to humans is significantly different from that of the
pure material or where no hazard to
humans is posed, the material may be
described using an alternative shipping
name that represents the hazards posed
by the material. An appropriate alternate proper shipping name and hazard
class may be authorized by the Associate Administrator.
(2) The letter  - A -  denotes a material
that is subject to the requirements of
this subchapter only when offered or
intended for transportation by aircraft,
unless the material is a hazardous substance or a hazardous waste. A shipping description entry preceded by an
 - A -  may be used to describe a material
for other modes of transportation provided all applicable requirements for
the entry are met.
(3) The letter  - D -  identifies proper
shipping names which are appropriate

Section 172.101

for describing materials for domestic
transportation but may be inappropriate for international transportation
under the provisions of international
regulations (e.g., IMO, ICAO). An alternate proper shipping name may be selected when either domestic or international transportation is involved.
(4) The letter  - G -  identifies proper
shipping names for which one or more
technical names of the hazardous material must be entered in parentheses,
in association with the basic description. (See Section 172.203(k).)
(5) The letter  - I -  identifies proper
shipping names which are appropriate
for describing materials in international transportation. An alternate
proper shipping name may be selected
when only domestic transportation is
involved.
(6) The letter  - W -  denotes a material
that is subject to the requirements of
this subchapter only when offered or
intended for transportation by vessel,
unless the material is a hazardous substance or a hazardous waste. A shipping description entry preceded by a
 - W -  may be used to describe a material for other modes of transportation
provided all applicable requirements
for the entry are met.
(c) Column 2: Hazardous materials descriptions and proper shipping names.
Column 2 lists the hazardous materials
descriptions and proper shipping names
of materials designated as hazardous
materials. Modification of a proper
shipping name may otherwise be required or authorized by this section.
Proper shipping names are limited to
those shown in Roman type (not
italics).
(1) Proper shipping names may be
used in the singular or plural and in either capital or lower case letters.
Words may be alternatively spelled in
the same manner as they appear in the
ICAO Technical Instructions or the
IMDG Code. For example  - aluminum - 
may be spelled  - aluminium -  and  - sulfur -  may be spelled  - sulphur - . However, the word  - inflammable -  may not
be used in place of the word  - flammable - .
(2) Punctuation marks and words in
italics are not part of the proper shipping name, but may be used in addition
to the proper shipping name. The word

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