437 

Pipeline and Haz. Matls. Safety Admin., DOT 

§ 172.552 

‘‘WHEN WET’’ must be at least 25 mm 
(1.0 inches) high. The symbol, text, 
class number and inner border must be 
white. 

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

§ 172.550

OXIDIZER placard. 

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

DIZER placard must be as follows: 

(b) In addition to complying with 

§ 172.519, the background color on the 
OXIDIZER placard must be yellow. The 
symbol, text, division number and 
inner border must be black. 

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

§ 172.552

ORGANIC PEROXIDE 

placard. 

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

GANIC PEROXIDE placard must be as 
follows: 

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