408 

49 CFR Ch. I (10–1–23 Edition) 

§ 172.324 

(d) The BIOHAZARD marking re-

quired by paragraph (a) of this section 
must be displayed on a background of 
contrasting color. It may be displayed 
on a plain white square-on-point con-
figuration having the same outside di-
mensions as a placard, as specified in 
§ 172.519(c) of this part. 

[67 FR 53135, Aug. 14, 2002, as amended at 76 
FR 56314, Sept. 13, 2011] 

§ 172.324

Hazardous substances in 

non-bulk packagings. 

For each non-bulk package that con-

tains a hazardous substance— 

(a) Except for packages of radio-

active material labeled in accordance 
with § 172.403, if the proper shipping 
name of a material that is a hazardous 
substance does not identify the haz-
ardous substance by name, the name of 
the hazardous substance must be 
marked on the package, in parentheses, 
in association with the proper shipping 
name. If the material contains two or 
more hazardous substances, at least 
two hazardous substances, including 
the two with the lowest reportable 
quantities (RQs), must be identified. 
For a hazardous waste, the waste code 
(e.g., D001), if appropriate, may be used 
to identify the hazardous substance. 

(b) The letters ‘‘RQ’’ must be marked 

on the package in association with the 
proper shipping name. 

(c) A package of limited quantity 

material marked in accordance with 
§ 172.315 must also be marked in accord-

ance with the applicable requirements 
of this section. 

[73 FR 4716, Jan. 28, 2008, as amended at 76 
FR 3367, Jan. 19, 2011] 

§ 172.325

Elevated temperature mate-

rials. 

(a) Except as provided in paragraph 

(b) of this section, a bulk packaging 
containing an elevated temperature 
material must be marked on two op-
posing sides with the word ‘‘HOT’’ in 
black or white Gothic lettering on a 
contrasting background. The marking 
must be displayed on the packaging 
itself or in black lettering on a plain 
white square-on-point configuration 
having the same outside dimensions as 
a placard. (See § 172.302(b) for size of 
markings on bulk packagings.) 

(b) Bulk packagings containing mol-

ten aluminum or molten sulfur must be 
marked ‘‘MOLTEN ALUMINUM’’ or 
‘‘MOLTEN SULFUR’’, respectively, in 
the same manner as prescribed in para-
graph (a) of this section. 

(c) If the identification number is 

displayed on a white-square-on-point 
display configuration, as prescribed in 
§ 172.336(b), the word ‘‘HOT’’ may be 
displayed in the upper corner of the 
same white-square-on-point display 
configuration. The word ‘‘HOT’’ must 
be in black letters having a height of 
at least 50 mm (2.0 inches). Except for 
size, these markings shall be as illus-
trated for an Elevated temperature ma-
terial, liquid, n.o.s.: