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397 

Pipeline and Haz. Matls. Safety Admin., DOT 

§ 172.302 

(1) Transported by highway only and 

will not be transferred from one motor 
carrier to another; or 

(2) Part of a carload lot, truckload 

lot or freight container load, and the 
entire contents of the rail car, truck or 
freight container are shipped from one 
consignor to one consignee. 

(e) 

Previously marked packagings. 

package which has been previously 
marked as required for the material it 
contains and on which the marking re-
mains legible, need not be remarked. 
(For empty packagings, see § 173.29 of 
this subchapter.) 

(f) 

NON-ODORIZED marking on cyl-

inders containing LPG. 

No person may 

offer for transportation or transport a 
specification cylinder, except a Speci-
fication 2P or 2Q container or a Speci-
fication 39 cylinder, containing 
unodorized liquefied petroleum gas 
(LPG) unless it is legibly marked NON- 
ODORIZED or NOT ODORIZED in let-
ters not less than 6.3 mm (0.25 inches) 
in height near the marked proper ship-
ping name required by paragraph (a) of 
this section. The NON-ODORIZED or 
NOT ODORIZED marking may appear 
on a cylinder used for both unodorized 
and odorized LPG. 

[Amdt. 172–123, 55 FR 52590, Dec. 21, 1990, as 
amended by Amdt. 172–151, 62 FR 1227, Jan. 8, 
1997; 62 FR 39404, July 22, 1997; 63 FR 16075, 
Apr. 1, 1998; 66 FR 45182, Aug. 28, 2001; 68 FR 
45030, July 31, 2003; 69 FR 64471, Nov. 4, 2004; 
70 FR 73164, Dec. 9, 2005; 71 FR 32258, June 2, 
2006; 76 FR 3365, Jan. 19, 2011; 76 FR 56314, 
Sept. 13, 2011; 78 FR 1072, Jan. 7, 2013; 78 FR 
65478, Oct. 31, 2013; 81 FR 35540, June 2, 2016; 
87 FR 44990, July 26, 2022] 

§ 172.302

General marking require-

ments for bulk packagings. 

(a) 

Identification numbers. 

Except as 

otherwise provided in this subpart, no 
person may offer for transportation or 
transport a hazardous material in a 
bulk packaging unless the packaging is 
marked as required by § 172.332 with the 
identification number specified for the 
material in the § 172.101 table— 

(1) On each side and each end, if the 

packaging has a capacity of 3,785 L 
(1,000 gallons) or more; 

(2) On two opposing sides, if the pack-

aging has a capacity of less than 3,785 
L (1,000 gallons); or 

(3) For cylinders permanently in-

stalled on a tube trailer motor vehicle, 

on each side and each end of the motor 
vehicle. 

(b) 

Size of markings. 

Except as other-

wise provided, markings required by 
this subpart on bulk packagings 
must— 

(1) Have a width of at least 6.0 mm 

(0.24 inch) and a height of at least 100 
mm (3.9 inches) for rail cars; 

(2) Have a width of at least 4.0 mm 

(0.16 inch) and a height of at least 12 
mm (0.47 inch) for portable tanks with 
capacities of less than 3,785 L (1,000 gal-
lons) and a width of at least 4.0 mm 
(0.16 inch) and a height of 25 mm (one 
inch) for IBCs; and 

(3) Have a width of at least 6.0 mm 

(0.24 inch) and a height of at least 50 
mm (2.0 inches) for cargo tanks and 
other bulk packagings. 

(c) 

Special permit packagings. 

Except 

as provided in § 173.23 of this sub-
chapter, the outside of each package 
used under the terms of a special per-
mit must be plainly and durably 
marked ‘‘DOT–SP’’ followed by the spe-
cial permit number assigned. Packages 
authorized by an exemption issued 
prior to October 1, 2007 may be plainly 
and durably marked ‘‘DOT–E’’ in lieu 
of ‘‘DOT–SP’’ followed by the number 
assigned as specified in the most recent 
version of that exemption. 

(d) Each bulk packaging marked with 

a proper shipping name, common name 
or identification number as required by 
this subpart must remain marked when 
it is emptied unless it is— 

(1) Sufficiently cleaned of residue and 

purged of vapors to remove any poten-
tial hazard; or 

(2) Refilled, with a material requiring 

different markings or no markings, to 
such an extent that any residue re-
maining in the packaging is no longer 
hazardous. 

(e) Additional requirements for 

marking portable tanks, cargo tanks, 
tank cars, multi-unit tank car tanks, 
and other bulk packagings are pre-
scribed in §§ 172.326, 172.328, 172.330, and 
172.331, respectively, of this subpart. 

(f) A bulk packaging marked prior to 

October 1, 1991, in conformance to the 
regulations of this subchapter in effect 
on September 30, 1991, need not be re-
marked if the key words of the proper 
shipping name are identical to those 
currently specified in the § 172.101 

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398 

49 CFR Ch. I (10–1–23 Edition) 

§ 172.303 

table. For example, a tank car marked 
‘‘NITRIC OXIDE’’ need not be re-
marked ‘‘NITRIC OXIDE, COM-
PRESSED’’. 

(g) A rail car, freight container, 

truck body or trailer in which the lad-
ing has been fumigated with any haz-
ardous material, or is undergoing fumi-
gation, must be marked as specified in 
§ 173.9 of this subchapter. 

[Amdt. 172–123, 55 FR 52591, Dec. 21, 1990, as 
amended at 56 FR 66254, Dec. 20, 1991; Amdt. 
172–150, 61 FR 50624, Sept. 26, 1996; Amdt. 172– 
151, 62 FR 1228, Jan. 8, 1997; 62 FR 39398, July 
22, 1997; 66 FR 45379, Aug. 28, 2001; 70 FR 73164, 
Dec. 9, 2005; 72 FR 55692, Oct. 1, 2007; 85 FR 
75712, Nov. 25, 2020] 

§ 172.303

Prohibited marking. 

(a) No person may offer for transpor-

tation or transport a package which is 
marked with the proper shipping name, 
the identification number of a haz-
ardous material or any other markings 
indicating that the material is haz-
ardous (e.g., RQ, INHALATION HAZ-
ARD) unless the package contains the 
identified hazardous material or its 
residue. 

(b) This section does not apply to— 
(1) Transportation of a package in a 

transport vehicle or freight container 
if the package is not visible during 
transportation and is loaded by the 
shipper and unloaded by the shipper or 
consignee. 

(2) Markings on a package which are 

securely covered in transportation. 

(3) The marking of a shipping name 

on a package when the name describes 
a material not regulated under this 
subchapter. 

[Amdt. 172–123, 55 FR 52591, Dec. 21, 1990, as 
amended at 56 FR 66254, Dec. 20, 1991; 72 FR 
55692, Oct. 1, 2007] 

§ 172.304

Marking requirements. 

(a) The marking required in this sub-

part— 

(1) Must be durable, in English and 

printed on or affixed to the surface of a 
package or on a label, tag, or sign. 

(2) Must be displayed on a back-

ground of sharply contrasting color; 

(3) Must be unobscured by labels or 

attachments; and 

(4) Must be located away from any 

other marking (such as advertising) 

that could substantially reduce its ef-
fectiveness. 

(b) [Reserved] 

[Amdt. 172–29, 41 FR 15996, Apr. 15, 1976, as 
amended by Amdt. 172–29B, 41 FR 57067, Dec. 
30, 1976] 

§ 172.306

[Reserved] 

§ 172.308

Authorized abbreviations. 

(a) Abbreviations may not be used in 

a proper shipping name marking except 
as authorized in this section. 

(b) The abbreviation ‘‘ORM’’ may be 

used in place of the words ‘‘Other Reg-
ulated Material.’’ 

(c) Abbreviations which appear as au-

thorized descriptions in column 2 of the 
§ 172.101 table (e.g., ‘‘TNT’’ and ‘‘PCB’’) 
are authorized. 

[Amdt. 172–123, 55 FR 52591, Dec. 21, 1990, as 
amended by Amdt. 172–145, 60 FR 49110, Sept. 
21, 1995] 

§ 172.310

Class 7 (radioactive) mate-

rials. 

In addition to any other markings re-

quired by this subpart, each package 
containing Class 7 (radioactive) mate-
rials must be marked as follows: 

(a) Each package with a gross mass 

greater than 50 kg (110 lb) must have 
its gross mass including the unit of 
measurement (which may be abbre-
viated) marked on the outside of the 
package. 

(b) Each industrial, Type A, Type 

B(U), or Type B(M) package must be 
legibly and durably marked on the out-
side of the packaging, in letters at 
least 12 mm (0.47 in) high, with the 
words ‘‘TYPE IP–1,’’ ‘‘TYPE IP–2,’’ 
‘‘TYPE IP–3,’’ ‘‘TYPE A,’’ ‘‘TYPE 
B(U)’’ or ‘‘TYPE B(M),’’ as appropriate. 
A package which does not conform to 
Type IP–1, Type IP–2, Type IP–3, Type 
A, Type B(U) or Type B(M) require-
ments may not be so marked. 

(c) Each package which conforms to 

an IP–1, IP–2, IP–3 or a Type A package 
design must be legibly and durably 
marked on the outside of the pack-
aging with the international vehicle 
registration code of the country of ori-
gin of the design. The international ve-
hicle registration code for packages de-
signed by a United States company or 
agency is the symbol ‘‘USA.’’