Section 172.331

49 CFR Ch. I (10-1-18 Edition)

Hydrogen cyanide, stabilized (less than 3%
water)
Hydrogen fluoride, anhydrous
Hydrogen peroxide, aqueous solutions (greater 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 solution, or Phosphorus, yellow dry or Phosphorus, yellow, under water or Phosphorus,
yellow, in solution
Phosphorus white, molten
Potassium nitrate and sodium nitrate mixtures
Potassium permanganate
Sulfur trioxide, stabilized
Sulfur trioxide, uninhibited

(2) In a multi-unit tank car tank, unless the tank is marked on two opposing 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
Section 172.101 table or with a common name
authorized for the material in this subchapter (e.g.,  - Refrigerant Gas - ); and
(ii) With the identification number
specified for the material in the
Section 172.101 table, unless marked in accordance with SectionSection 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 Section 172.332, with the
identification number specified for the
material in the Section 172.101 table.
(c) No person may offer for transportation or transport a tank car or
multi-unit tank car tank containing
unodorized liquefied petroleum gas
(LPG) unless it is legibly marked NONODORIZED 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]

Section 172.331 Bulk packagings other than
portable tanks, cargo tanks, tank
cars and multi-unit tank car tanks.
(a) Each person who offers a hazardous 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 transportation, 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 material for transportation shall affix to
the packaging the required identification numbers on orange panels, squareon-point configurations or placards, as
appropriate, prior to, or at the time
the packaging is offered for transportation 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 Section 172.302(a) is not
visible, the transport vehicle or freight
container must be marked as required
by Section 172.332 on each side and each end
with the identification number specified for the material in the Section 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]

Section 172.332 Identification number markings.
(a) General. When required by
Section 172.301, Section 172.302, Section 172.313, Section 172.326,
Section 172.328, Section 172.330, or Section 172.331, identification number markings must be displayed on orange panels or placards as

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