413
Pipeline and Haz. Matls. Safety Admin., DOT
§ 172.332
Hydrogen cyanide, stabilized (less than 3%
water)
Hydrogen fluoride, anhydrous
Hydrogen peroxide, aqueous solutions (great-
er than 20% hydrogen peroxide)
Hydrogen peroxide, stabilized
Hydrogen peroxide and peroxyacetic acid
mixtures
Nitric acid (other than red fuming)
Phosphorus, amorphous
Phosphorus, white dry
or
Phosphorus, white,
under water
or
Phosphorus white, in solu-
tion,
or
Phosphorus, yellow dry
or
Phos-
phorus, yellow, under water
or
Phosphorus,
yellow, in solution
Phosphorus white, molten
Potassium nitrate and sodium nitrate mix-
tures
Potassium permanganate
Sulfur trioxide, stabilized
Sulfur trioxide, uninhibited
(2) In a multi-unit tank car tank, un-
less the tank is marked on two oppos-
ing sides, in letters and numerals no
less than 50 mm (2.0 inches) high—
(i) With the proper shipping name
specified for the material in the
§ 172.101 table or with a common name
authorized for the material in this sub-
chapter (e.g., ‘‘Refrigerant Gas’’); and
(ii) With the identification number
specified for the material in the
§ 172.101 table, unless marked in accord-
ance with §§ 172.302(a) and 172.332 of this
subpart.
(b) A motor vehicle or rail car used
to transport a multi-unit tank car
tank containing a hazardous material
must be marked on each side and each
end, as required by § 172.332, with the
identification number specified for the
material in the § 172.101 table.
(c) No person may offer for transpor-
tation or transport a tank car or
multi-unit tank car tank containing
unodorized liquefied petroleum gas
(LPG) unless it is legibly marked NON-
ODORIZED or NOT ODORIZED on two
opposing sides near the marked proper
shipping name required by paragraphs
(a)(1) and (2) of this section, or near the
placards. The NON-ODORIZED or NOT
ODORIZED marking may appear on a
tank car or multi-unit tank car tank
used for both unodorized and odorized
LPG.
[Amdt. 172–123, 55 FR 52593, Dec. 21, 1990, as
amended at 56 FR 66255, Dec. 20, 1991; 57 FR
45458, Oct. 1, 1992; Amdt. 172–148, 61 FR 28676,
June 5, 1996; Amdt. 172–148, 61 FR 50254, Sept.
25, 1996; 66 FR 33425, June 21, 2001; 69 FR
64471, Nov. 4, 2004; 81 FR 35540, June 2, 2016;
85 FR 83380, Dec. 21, 2020]
§ 172.331
Bulk packagings other than
portable tanks, cargo tanks, tank
cars and multi-unit tank car tanks.
(a) Each person who offers a haz-
ardous material to a motor carrier for
transportation in a bulk packaging
shall provide the motor carrier with
the required identification numbers on
placards or plain white square-on-point
display configurations, as authorized,
or shall affix orange panels containing
the required identification numbers to
the packaging prior to or at the time
the material is offered for transpor-
tation, unless the packaging is already
marked with the identification number
as required by this subchapter.
(b) Each person who offers a bulk
packaging containing a hazardous ma-
terial for transportation shall affix to
the packaging the required identifica-
tion numbers on orange panels, square-
on-point configurations or placards, as
appropriate, prior to, or at the time
the packaging is offered for transpor-
tation unless it is already marked with
identification numbers as required by
this subchapter.
(c) For a bulk packaging contained in
or on a transport vehicle or freight
container, if the identification number
marking on the bulk packaging (e.g.,
an IBC) required by § 172.302(a) is not
visible, the transport vehicle or freight
container must be marked as required
by § 172.332 on each side and each end
with the identification number speci-
fied for the material in the § 172.101
table.
[Amdt. 172–123, 55 FR 52593, Dec. 21, 1994, as
amended by Amdt. 172–151, 62 FR 1228, Jan. 8,
1997; 62 FR 39398, July 22, 1997]
§ 172.332
Identification number mark-
ings.
(a)
General.
When required by
§ 172.301, § 172.302, § 172.313, § 172.326,
414
49 CFR Ch. I (10–1–23 Edition)
§ 172.332
§ 172.328, § 172.330, or § 172.331, identifica-
tion number markings must be dis-
played on orange panels or placards as
specified in this section, or on white
square-on-point configurations as pre-
scribed in § 172.336(b).
(b)
Orange panels.
Display of an iden-
tification number on an orange panel
shall be in conformance with the fol-
lowing:
(1) The orange panel must be 160 mm
(6.3 inches) high by 400 mm (15.7 inches)
wide with a 15 mm (0.6 inches) black
outer border. The identification num-
ber shall be displayed in 100 mm (3.9
inches) black Helvetica Medium nu-
merals on the orange panel. Measure-
ments may vary from those specified
plus or minus 5 mm (0.2 inches).
(2) The orange panel may be made of
any durable material prescribed for
placards in § 172.519, and shall be of the
orange color specified for labels or
placards in appendix A to this part.
(3) The name and hazard class of a
material may be shown in the upper
left border of the orange panel in let-
ters not more than 18 points (0.25 in.)
high.
(4) Except for size and color, the or-
ange panel and identification numbers
shall be as illustrated for Liquefied pe-
troleum gas:
(c)
Placards.
Display of an identifica-
tion number on a hazard warning
placard shall be in conformance with
the following:
(1) The identification number shall
be displayed across the center area of
the placard in 88 mm (3.5 inches) black
Alpine Gothic or Alternate Gothic No.
3 numerals on a white background 100
mm (3.9 inches) high and approxi-
mately 215 mm (8.5 inches) wide and
may be outlined with a solid or dotted
line border.
(2) The top of the 100 mm (3.9 inches)
high white background shall be ap-
proximately 40 mm (1.6 inches) above
the placard horizontal center line.
(3) An identification number may be
displayed only on a placard cor-
responding to the primary hazard class
of the hazardous material.
(4) For a COMBUSTIBLE placard
used to display an identification num-
ber, the entire background below the
white background for the identifica-
tion number must be white during
transportation by rail and may be
white during transportation by high-
way.
(5) The name of the hazardous mate-
rial and the hazard class may be shown
in letters not more than 18 points high
immediately within the upper border of
the space on the placard bearing the
identification number of the material.
(6) If an identification number is
placed over the word(s) on a placard,
the word(s) should be substantially
covered to maximize the effectiveness
of the identification number.
(d)
Example.
Except for size and color,
the display of an identification number
on a placard shall be as illustrated for
Acetone:
415
Pipeline and Haz. Matls. Safety Admin., DOT
§ 172.334
[Amdt. 172–101, 45 FR 74667, Nov. 10, 1980, as
amended by Amdt. 172–81, 48 FR 28099, June
20, 1983; Amdt. 172–110, 52 FR 29527, Aug. 10,
1987; Amdt. 172–123, 55 FR 52593, Dec. 21, 1990;
56 FR 66255, Dec. 20, 1991; Amdt. 172–151, 62
FR 1228, Jan. 8, 1997; 65 FR 50459, Aug. 18,
2000; 68 FR 57632, Oct. 6, 2003; 87 FR 79772,
Dec. 27, 2022]
§ 172.334
Identification numbers; pro-
hibited display.
(a) No person may display an identi-
fication number on a RADIOACTIVE,
EXPLOSIVES 1.1, 1.2, 1.3, 1.4, 1.5 or 1.6,
DANGEROUS, or subsidiary hazard
placard.
(b) No person may display an identi-
fication number on a placard, orange
panel or white square-on-point display
configuration unless—
(1) The identification number is spec-
ified for the material in § 172.101;
(2) The identification number is dis-
played on the placard, orange panel or
white square-on-point configuration
authorized by § 172.332 or § 172.336(b), as
appropriate, and any placard used for
display of the identification number
corresponds to the hazard class of the
material specified in § 172.504;
(3) Except as provided under § 172.336
(c)(4) or (c)(5), the package, freight con-
tainer, or transport vehicle on which
the number is displayed contains the
hazardous material associated with
that identification number in § 172.101.
(c) Except as required by
§ 172.332(c)(4) for a combustible liquid,
the identification number of a material
may be displayed only on the placards
required by the tables in § 172.504.
(d) Except as provided in § 172.336, a
placard bearing an identification num-
ber may not be used to meet the re-
quirements of subpart F of this part
unless it is the correct identification
number for all hazardous materials of
the same class in the transport vehicle
or freight container on which it is dis-
played.
(e) Except as specified in § 172.338, an
identification number may not be dis-
played on an orange panel on a cargo
tank unless affixed to the cargo tank
by the person offering the hazardous
material for transportation in the
cargo tank.
(f) If a placard is required by § 172.504,
an identification number may not be