page-199

345

Pipeline and Haz. Matls. Safety Admin., DOT

§ 172.102

containing sulfur is not subject to the
placarding requirements of subpart F of
this part, if it is marked with the appro-
priate identification number as required by
subpart D of this part. Molten sulfur must
be marked as required by § 172.325 of this
subchapter.

Materials which have undergone suffi-

cient heat treatment to render them non-
hazardous are not subject to the require-
ments of this subchapter.

Polymeric beads and molding compounds

may be made from polystyrene,
poly(methyl methacrylate) or other poly-
meric material.

Ammonium nitrites and mixtures of an

inorganic nitrite with an ammonium salt
are prohibited.

The commercial grade of calcium nitrate

fertilizer, when consisting mainly of a dou-
ble salt (calcium nitrate and ammonium
nitrate) containing not more than 10 per-
cent ammonium nitrate and at least 12 per-
cent water of crystallization, is not subject
to the requirements of this subchapter.

Antimony sulphides and oxides which do

not contain more than 0.5 percent of ar-
senic calculated on the total mass do not
meet the definition of Division 6.1.

Unless it can be demonstrated by testing

that the sensitivity of the substance in its
frozen state is no greater than in its liquid
state, the substance must remain liquid
during normal transport conditions. It
must not freeze at temperatures above

C (5

F).

If this material shows a violent effect in

laboratory tests involving heating under
confinement, the labeling requirements of
Special Provision 53 apply, and the mate-
rial must be packaged in accordance with
packing method OP6 in § 173.225 of this sub-
chapter. If the SADT of the technically
pure substance is higher than 75

C, the

technically pure substance and formula-
tions derived from it are not self-reactive
materials and, if not meeting any other
hazard class, are not subject to the re-
quirements of this subchapter.

This substance may be carried under pro-

visions other than those of Class 1 only if
it is so packed that the percentage of
water will not fall below that stated at any
time during transport. When phlegmatized
with water and inorganic inert material,
the content of urea nitrate must not ex-
ceed 75 percent by mass and the mixture
should not be capable of being detonated
by test 1(a)(i) or test 1(a)(ii) in the UN
Manual of Tests and Criteria (IBR, see
§ 171.7 of this subchapter).

Polyester resin kits consist of two com-

ponents: A base material (either Class 3 or
Division 4.1, Packing Group II or III) and
an activator (organic peroxide), each sepa-
rately packed in an inner packaging. The
organic peroxide must be type D, E, or F,

not requiring temperature control. The
components may be placed in the same
outer packaging provided they will not
interact dangerously in the event of leak-
age. The Packing Group assigned will be II
or III, according to the classification cri-
teria for either Class 3 or Division 4.1, as
appropriate, applied to the base material.
Additionally, unless otherwise excepted in
this subchapter, polyester resin kits must
be packaged in specification combination
packagings based on the performance level
of the base material contained within the
kit.

This material at the Packing Group II

hazard criteria level may be transported in
Large Packagings.

The membrane filters, including paper

separators and coating or backing mate-
rials, that are present in transport, must
not be able to propagate a detonation as
tested by one of the tests described in the
UN Manual of Tests and Criteria, Part I,
Test series 1(a) (IBR, see § 171.7 of this sub-
chapter). On the basis of the results of
suitable burning rate tests, and taking
into account the standard tests in the UN
Manual of Tests and Criteria, Part III, sub-
section 33.2.1 (IBR, see § 171.7 of this sub-
chapter), nitrocellulose membrane filters
in the form in which they are to be trans-
ported that do not meet the criteria for a
Division 4.1 material are not subject to the
requirements of this subchapter. Pack-
agings must be so constructed that explo-
sion is not possible by reason of increased
internal pressure. Nitrocellulose mem-
brane filters covered by this entry, each
with a mass not exceeding 0.5 g, are not
subject to the requirements of this sub-
chapter when contained individually in an
article or a sealed packet.

The formulation must be prepared so

that it remains homogenous and does not
separate during transport. Formulations
with low nitrocellulose contents and nei-
ther showing dangerous properties when
tested for their ability to detonate,
deflagrate or explode when heated under
defined confinement by the appropriate
test methods and criteria in the UN Man-
ual of Tests and Criteria (IBR, see § 171.7 of
this subchapter), nor classed as a Division
4.1 (flammable solid) when tested in ac-
cordance with the procedures specified in
§ 173.124 of this subchapter (chips, if nec-
essary, crushed and sieved to a particle
size of less than 1.25 mm), are not subject
to the requirements of this subchapter.

Temperature should be maintained be-

tween 18

C (64.4

F) and 40

C (104

F).

Tanks containing solidified methacrylic
acid must not be reheated during trans-
port.

This material must be packed in accord-

ance with packing method OP6 (see § 173.225
of this subchapter). During transport, it

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