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.