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443 

Pipeline and Haz. Matls. Safety Admin., DOT 

§ 172.523 

outside of the solid line inner border in 
no larger than 10-point type. 

(f) 

Exceptions. 

When hazardous mate-

rials are offered for transportation or 
transported under the provisions of 
subpart C of part 171 of this subchapter, 
a placard conforming to the specifica-
tions in the UN Recommendations, the 
ICAO Technical Instructions, the 
IMDG Code, or the Transport Canada 
TDG Regulations (IBR, see § 171.7 of 
this subchapter) may be used in place 
of a corresponding placard conforming 
to the requirements of this subpart. 
However, a bulk packaging, transport 
vehicle, or freight container containing 
a material poisonous by inhalation (see 
§ 171.8 of this subchapter) must be plac-
arded in accordance with this subpart 
(see § 171.23(b)(10) of this subchapter). 

(g) 

Trefoil symbol. 

The trefoil symbol 

on the RADIOACTIVE placard must 
meet the appropriate specification in 
appendix B of this part. 

[Amdt. 172–123, 55 FR 52601, Dec. 21, 1990, as 
amended at 56 FR 66260, Dec. 20, 1991; 57 FR 
45460, Oct. 1, 1992; Amdt. 172–143, 60 FR 50305, 
Sept. 28, 1995; 65 FR 50460, Aug. 18, 2000; 66 FR 
33426, June 21, 2001; 66 FR 44255, Aug. 22, 2001; 
67 FR 15743, Apr. 3, 2002; 70 FR 34075, June 13, 
2005; 69 FR 64473, Nov. 4, 2004; 72 FR 25176, 
May 3, 2007; 76 FR 43528, July 20, 2011; 76 FR 
56314, Sept. 13, 2011; 80 FR 1151, Jan. 8, 2015; 
83 FR 55807, Nov. 7, 2018; 87 FR 79774, Dec. 27, 
2022] 

§ 172.521

DANGEROUS placard. 

(a) Except for size and color, the 

DANGEROUS placard must be as fol-
lows: 

(b) In addition to meeting the re-

quirements of § 172.519, and appendix B 
to this part, the DANGEROUS placard 
must have a red upper and lower tri-
angle. The placard center area and 

1

2

inch (12.7 mm.) border must be white. 
The inscription must be black with the 

1

8

-inch (3.2 mm.) border marker in the 

white area at each end of the inscrip-
tion red. 

[Amdt. 172–29, 41 FR 15996, Apr. 15, 1976, as 
amended by Amdt. 172–29A, 41 FR 40680, Sept. 
20, 1976] 

§ 172.522

EXPLOSIVES 1.1, EXPLO-

SIVES 1.2 and EXPLOSIVES 1.3 
placards. 

(a) Except for size and color, the EX-

PLOSIVES 1.1, EXPLOSIVES 1.2 and 
EXPLOSIVES 1.3 placards must be as 
follows: 

(b) In addition to complying with 

§ 172.519 of this subpart, the background 
color on the EXPLOSIVES 1.1, EXPLO-
SIVES 1.2, and EXPLOSIVES 1.3 plac-
ards must be orange. The ‘‘*’’ shall be 
replaced with the appropriate division 
number and, when required, appro-
priate compatibility group letter. The 
symbol, text, numerals and inner bor-
der must be black. 

[Amdt. 172–123, 55 FR 52602, Dec. 21, 1990, as 
amended at 56 FR 66260, Dec. 20, 1991] 

§ 172.523

EXPLOSIVES 1.4 placard. 

(a) Except for size and color, the EX-

PLOSIVES 1.4 placard must be as fol-
lows: 

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444 

49 CFR Ch. I (10–1–23 Edition) 

§ 172.524 

(b) In addition to complying with 

§ 172.519 of this subpart, the background 
color on the EXPLOSIVES 1.4 placard 
must be orange. The ‘‘*’’ shall be re-
placed, when required, with the appro-
priate compatibility group letter. The 
division numeral, 1.4, must measure at 
least 64 mm (2.5 inches) in height. The 
text, numerals and inner border must 
be black. 

[Amdt. 172–123, 55 FR 52602, Dec. 21, 1990, as 
amended at 56 FR 66261, Dec. 20, 1991] 

§ 172.524

EXPLOSIVES 1.5 placard. 

(a) Except for size and color, the EX-

PLOSIVES 1.5 placard must be as fol-
lows: 

(b) In addition to complying with the 

§ 172.519 of this subpart, the background 
color on EXPLOSIVES 1.5 placard 

must be orange. The ‘‘*’’ shall be re-
placed, when required, with the appro-
priate compatibility group letter. The 
division numeral, 1.5, must measure at 
least 64 mm (2.5 inches) in height. The 
text, numerals and inner border must 
be black. 

[Amdt. 172–123, 55 FR 52602, Dec. 21, 1990, as 
amended at 56 FR 66261, Dec. 20, 1991] 

§ 172.525

EXPLOSIVES 1.6 placard. 

(a) Except for size and color the EX-

PLOSIVES 1.6 placard must be as fol-
lows: 

(b) In addition to complying with 

§ 172.519 of this subpart, the background 
color on the EXPLOSIVES 1.6 placard 
must be orange. The ‘‘*’’ shall be re-
placed, when required, with the appro-
priate compatibility group letter. The 
division numeral, 1.6, must measure at 
least 64 mm (2.5 inches) in height. The 
text, numerals and inner border must 
be black. 

[Amdt. 172–123, 55 FR 52603, Dec. 21, 1990, as 
amended at 56 FR 66261, Dec. 20, 1991; Amdt. 
172–130, 58 FR 51531, Oct. 1, 1993] 

§ 172.526

[Reserved] 

§ 172.527

Background requirements for 

certain placards. 

(a) Except for size and color, the 

square background required by 
§ 172.510(a) for certain placards on rail 
cars, and § 172.507 for placards on motor 
vehicles containing a package of high-
way route controlled quantity radio-
active materials, must be as follows: