446 

49 CFR Ch. I (10–1–23 Edition) 

§ 172.536 

FLAMMABLE GAS placard must be 
red. The symbol, text, class number 
and inner border must be white. 

[Amdt. 172–123, 56 FR 66262, Dec. 20, 1991] 

§ 172.536

[Reserved] 

§ 172.540

POISON GAS placard. 

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

SON GAS placard must be as follows: 

(b) In addition to complying with 

§ 172.519, the background on the POI-
SON GAS placard and the symbol must 
be white. The background of the upper 
diamond must be black and the lower 
point of the upper diamond must be 65 
mm (2

5

⁄

8

inches) above the horizontal 

center line. The text, class number, 
and inner border must be black. 

[62 FR 39408, July 22, 1997] 

§ 172.542

FLAMMABLE placard. 

(a) Except for size and color, the 

FLAMMABLE placard must be as fol-
lows: 

(b) In addition to complying with 

§ 172.519, the background color on the 
FLAMMABLE placard must be red. 
The symbol, text, class number and 
inner border must be white. 

(c) The word ‘‘GASOLINE’’ may be 

used in place of the word ‘‘FLAM-
MABLE’’ on a placard that is displayed 
on a cargo tank or a portable tank 
being used to transport gasoline by 
highway. The word ‘‘GASOLINE’’ must 
be shown in white. 

[Amdt. 172–123, 56 FR 66262, Dec. 20, 1991] 

§ 172.544

COMBUSTIBLE placard. 

(a) Except for size and color, the 

COMBUSTIBLE placard must be as fol-
lows: 

(b) In addition to complying with 

§ 172.519, the background color on the 
COMBUSTIBLE placard must be red. 

447 

Pipeline and Haz. Matls. Safety Admin., DOT 

§ 172.548 

The symbol, text, class number and 
inner border must be white. On a COM-
BUSTIBLE placard with a white bot-
tom as prescribed by § 172.332(c)(4), the 
class number must be red or black. 

(c) The words ‘‘FUEL OIL’’ may be 

used in place of the word ‘‘COMBUS-
TIBLE’’ on a placard that is displayed 
on a cargo tank or portable tank being 
used to transport by highway fuel oil 
that is not classed as a flammable liq-
uid. The words ‘‘FUEL OIL’’ must be 
white. 

[Amdt. 172–123, 56 FR 66262, Dec. 20, 1991] 

§ 172.546

FLAMMABLE SOLID placard. 

(a) Except for size and color, the 

FLAMMABLE SOLID placard must be 
as follows: 

(b) In addition to complying with 

§ 172.519, the background on the FLAM-
MABLE SOLID placard must be white 
with seven vertical red stripes. The 
stripes must be equally spaced, with 
one red stripe placed in the center of 
the label. Each red stripe and each 
white space between two red stripes 
must be 25 mm (1.0 inches) wide. The 
letters in the word ‘‘SOLID’’ must be 
at least 38.1 mm (1.5 inches) high. The 
symbol, text, class number and inner 
border must be black. 

[Amdt. 172–123, 56 FR 66263, Dec. 20, 1991] 

§ 172.547

SPONTANEOUSLY COMBUS-

TIBLE placard. 

(a) Except for size and color, the 

SPONTANEOUSLY COMBUSTIBLE 
placard must be as follows: 

(b) In addition to complying with 

§ 172.519, the background color on the 
SPONTANEOUSLY COMBUSTIBLE 
placard must be red in the lower half 
and white in upper half. The letters in 
the word ‘‘SPONTANEOUSLY’’ must 
be at least 12 mm (0.5 inch) high. The 
symbol, text, class number and inner 
border must be black. 

[Amdt. 172–123, 56 FR 66263, Dec. 20, 1991, as 
amended by Amdt. 172–139, 59 FR 67490, Dec. 
29, 1994] 

§ 172.548

DANGEROUS WHEN WET 

placard. 

(a) Except for size and color, the 

DANGEROUS WHEN WET placard 
must be as follows: 

(b) In addition to complying with 

§ 172.519, the background color on the 
DANGEROUS WHEN WET placard 
must be blue. The letters in the words