[Code of Federal Regulations]
[Title 49, Volume 2]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR173.128]
[Page 482-483]
TITLE 49--TRANSPORTATION
CHAPTER I--RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION, DEPARTMENT OF
TRANSPORTATION
PART 173--SHIPPERS--GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS--Table of Contents
Subpart D--Definitions Classification, Packing Group Assignments and
Exceptions for Hazardous Materials Other Than Class 1 and Class 7
Sec. 173.128 Class 5, Division 5.2--Definitions and types.
(a) Definitions. For the purposes of this subchapter, organic
peroxide (Division 5.2) means any organic compound containing oxygen (O)
in the bivalent -O-O- structure and which may be considered a derivative
of hydrogen peroxide, where one or more of the hydrogen atoms have been
replaced by organic radicals, unless any of the following paragraphs
applies:
(1) The material meets the definition of an explosive as prescribed
in subpart C of this part, in which case it must be classed as an
explosive;
(2) The material is forbidden from being offered for transportation
according to Sec. 172.101 of this subchapter or Sec. 173.21;
(3) The Associate Administrator has determined that the material
does not present a hazard which is associated with a Division 5.2
material; or
(4) The material meets one of the following conditions:
(i) For materials containing no more than 1.0 percent hydrogen
peroxide, the available oxygen, as calculated using the equation in
paragraph (a)(4)(ii) of this section, is not more than 1.0 percent, or
(ii) For materials containing more than 1.0 percent but not more
than 7.0 percent hydrogen peroxide, the available oxygen, content
(Oa) is not more than 0.5 percent, when determined using the
equation:
[GRAPHIC] [TIFF OMITTED] TC13NO91.031
where, for a material containing k species of organic peroxides:
ni = number of -O-O- groups per molecule of the i th species
ci = concentration (mass percent) of the i th species
mi = molecular mass of the i th species
(b) Generic types. Division 5.2 organic peroxides are assigned to a
generic system which consists of seven types. An organic peroxide
identified by technical name in the Organic Peroxides Table in
Sec. 173.225 is assigned to a generic type in accordance with that
table. Organic peroxides not identified in the Organic Peroxides table
are assigned to generic types under the procedures of paragraph (c) of
this section.
(1) Type A. Organic peroxide type A is an organic peroxide which can
detonate or deflagrate rapidly as packaged for transport. Transportation
of type A organic peroxides is forbidden.
(2) Type B. Organic peroxide type B is an organic peroxide which, as
packaged for transport, neither detonates nor deflagrates rapidly, but
can undergo a thermal explosion.
(3) Type C. Organic peroxide type C is an organic peroxide which, as
packaged for transport, neither detonates nor deflagrates rapidly and
cannot undergo a thermal explosion.
(4) Type D. Organic peroxide type D is an organic peroxide which--
(i) Detonates only partially, but does not deflagrate rapidly and is
not affected by heat when confined;
(ii) Does not detonate, deflagrates slowly, and shows no violent
effect if heated when confined; or
(iii) Does not detonate or deflagrate, and shows a medium effect
when heated under confinement.
(5) Type E. Organic peroxide type E is an organic peroxide which
neither detonates nor deflagrates and shows low,
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or no, effect when heated under confinement.
(6) Type F. Organic peroxide type F is an organic peroxide which
will not detonate in a cavitated state, does not deflagrate, shows only
a low, or no, effect if heated when confined, and has low, or no,
explosive power.
(7) Type G. Organic peroxide type G is an organic peroxide which
will not detonate in a cavitated state, will not deflagrate at all,
shows no effect when heated under confinement, and shows no explosive
power. A type G organic peroxide is not subject to the requirements of
this subchapter for organic peroxides of Division 5.2 provided that it
is thermally stable (self-accelerating decomposition temperature is 50
deg.C (122 deg.F) or higher for a 50 kg (110 pounds) package). An
organic peroxide meeting all characteristics of type G except thermal
stability and requiring temperature control is classed as a type F,
temperature control organic peroxide.
(c) Procedure for assigning an organic peroxide to a generic type.
An organic peroxide shall be assigned to a generic type based on--
(1) Its physical state (i.e., liquid or solid), in accordance with
the definitions for liquid and solid in Sec. 171.8 of this subchapter;
(2) A determination as to its control temperature and emergency
temperature, if any, under the provisions of Sec. 173.21(f); and
(3) Performance of the organic peroxide under the test procedures
specified in the UN Manual of Tests and Criteria, and the provisions of
paragraph (d) of this section.
(d) Approvals. (1) An organic peroxide must be approved, in writing,
by the Associate Administrator, before being offered for transportation
or transported, including assignment of a generic type and shipping
description, except for--
(i) An organic peroxide which is identified by technical name in the
Organic Peroxides Table in Sec. 173.225(b);
(ii) A mixture of organic peroxides prepared according to
Sec. 173.225(c); or
(iii) An organic peroxide which may be shipped as a sample under the
provisions of Sec. 173.225(c).
(2) A person applying for an approval must submit all relevant data
concerning physical state, temperature controls, and tests results or an
approval issued for the organic peroxide by the competent authority of a
foreign government.
(e) Tests. The generic type for an organic peroxide shall be
determined using the testing protocol from Figure 20.1(a)
(Classification and Flow Chart Scheme for Organic Peroxides) from the UN
Manual of Tests and Criteria (see Sec. 171.7 of this subchapter).
[Amdt. 173-224, 55 FR 52634, Dec. 21, 1990, as amended at 56 FR 66268,
Dec. 20, 1991; Amdt. 173-234, 58 FR 51532, Oct. 1, 1993; Amdt. 173-241,
59 FR 67508, Dec. 29, 1994; Amdt. 173-261, 62 FR 24732, May 6, 1997; 65
FR 58629, Sept. 29, 2000; 66 FR 8647, Feb. 1, 2001; 66 FR 45379, Aug.
28, 2001]