418 

49 CFR Ch. I (10–1–23 Edition) 

§ 172.400a 

T

ABLE

1 

TO

P

ARAGRAPH

(b)—Continued 

Hazard class or division 

Label name 

Label de-

sign 

or section 

reference 

6.1 (other than inhalation hazard, Zone A or B) .............

POISON ...........................................................................

172.430 

6.2 ....................................................................................

INFECTIOUS SUBSTANCE ............................................

172.432 

7 (see § 172.403) ............................................................

RADIOACTIVE WHITE–I ................................................

172.436 

7 .......................................................................................

RADIOACTIVE YELLOW–II ............................................

172.438 

7 .......................................................................................

RADIOACTIVE YELLOW–III ...........................................

172.440 

7 (fissile radioactive material; see § 172.402) .................

FISSILE ...........................................................................

172.441 

7 (empty packages, see § 173.428 of this subchapter) ..

EMPTY ............................................................................

172.450 

8 .......................................................................................

CORROSIVE ...................................................................

172.442 

9 .......................................................................................

CLASS 9 ..........................................................................

172.446 

[Amdt. 172–123, 55 FR 52593, Dec. 21, 1990, as amended at 56 FR 66255, Dec. 20, 1991; Amdt. 172– 
151, 62 FR 1228, Jan. 8, 1997; 64 FR 10776, Mar. 5, 1999; 64 FR 51918, Sept. 27, 1999; 69 FR 3668, 
Jan. 26, 2004; 69 FR 64471, Nov. 4, 2004; 78 FR 60753, Oct. 2, 2013; 85 FR 83381, Dec. 21, 2020; 87 
FR 79773, Dec. 27, 2022] 

§ 172.400a

Exceptions from labeling. 

(a) Notwithstanding the provisions of 

§ 172.400, a label is not required on— 

(1) A Dewar flask meeting the re-

quirements in § 173.320 of this sub-
chapter or a cylinder containing a Di-
vision 2.1, 2.2, or 2.3 material that is 
durably and legibly marked in accord-
ance with CGA C–7, Appendix A (IBR; 
see § 171.7 of this subchapter). Notwith-
standing this exception, overpacks 
must be labeled (see § 173.25 of this sub-
chapter). 

(2) A package or unit of military ex-

plosives (including ammunition) 
shipped by or on behalf of the DOD 
when in— 

(i) Freight containerload, carload or 

truckload shipments, if loaded and un-
loaded by the shipper or DOD; or 

(ii) Unitized or palletized break-bulk 

shipments by cargo vessel under char-
ter to DOD if at least one required 
label is displayed on each unitized or 
palletized load. 

(3) A package containing a hazardous 

material other than ammunition that 
is— 

(i) Loaded and unloaded under the su-

pervision of DOD personnel, and 

(ii) Escorted by DOD personnel in a 

separate vehicle. 

(4) A compressed gas cylinder perma-

nently mounted in or on a transport 
vehicle. 

(5) A freight container, aircraft unit 

load device or portable tank, which— 

(i) Is placarded in accordance with 

subpart F of this part, or 

(ii) Conforms to paragraph (a)(3) or 

(b)(3) of § 172.512. 

(6) An overpack or unit load device in 

or on which labels representative of 
each hazardous material in the over-
pack or unit load device are visible. 

(7) A package of low specific activity 

radioactive material and surface con-
taminated objects, when transported 
under § 173.427(a)(6)(vi) of this sub-
chapter. 

(8) Packages containing toy plastic 

or paper caps for toy pistols described 
as ‘‘UN0349, Articles, explosive, n.o.s. 
(Toy caps), 1.4S’’ or ‘‘NA0337, Toy caps, 
1.4S’’ when offered in conformance with 
the conditions of § 172.102(c)(1), Special 
provision 382. 

(b) Certain exceptions to labeling re-

quirements are provided for small 
quantities and limited quantities in ap-
plicable sections in part 173 of this sub-
chapter. 

(c) Notwithstanding the provisions of 

§ 172.402(a), a Division 6.1 subsidiary 
hazard label is not required on a pack-
age containing a Class 8 (corrosive) 
material which has a subsidiary hazard 
of Division 6.1 (poisonous) if the tox-
icity of the material is based solely on 
the corrosive destruction of tissue 
rather than systemic poisoning. In ad-
dition, a Division 4.1 subsidiary hazard 
label is not required on a package bear-
ing a Division 4.2 label. 

(d) A package containing a material 

poisonous by inhalation (see § 171.8 of 
this subchapter) in a closed transport 
vehicle or freight container may be ex-
cepted from the POISON INHALATION 

419 

Pipeline and Haz. Matls. Safety Admin., DOT 

§ 172.402 

HAZARD or POISON GAS label or 
placard, under the conditions set forth 
in § 171.23(b)(10) of this subchapter. 

[Amdt. 172–123, 55 FR 52594, Dec. 21, 1990] 

E

DITORIAL

N

OTE

: For F

EDERAL

R

EGISTER

ci-

tations affecting § 172.400a, see the List of 
CFR Sections Affected, which appears in the 
Finding Aids section of the printed volume 
and at 

www.govinfo.gov. 

§ 172.401

Prohibited labeling. 

(a) Except as otherwise provided in 

this section, no person may offer for 
transportation and no carrier may 
transport a package bearing a label 
specified in this subpart unless: 

(1) The package contains a material 

that is a hazardous material, and 

(2) The label represents a hazard of 

the hazardous material in the package. 

(b) No person may offer for transpor-

tation and no carrier may transport a 
package bearing any marking or label 
which by its color, design, or shape 
could be confused with or conflict with 
a label prescribed by this part. 

(c) The restrictions in paragraphs (a) 

and (b) of this section, do not apply to 
packages labeled in conformance with: 

(1) The UN Recommendations (IBR, 

see § 171.7 of this subchapter); 

(2) The IMDG Code (IBR, see § 171.7 of 

this subchapter); 

(3) The ICAO Technical Instructions 

(IBR, see § 171.7 of this subchapter); 

(4) The TDG Regulations (IBR, see 

§ 171.7 of this subchapter). 

(5) The Globally Harmonized System 

of Classification and Labelling of 
Chemicals (GHS) (IBR, see § 171.7 of 
this subchapter). 

(d) The provisions of paragraph (a) of 

this section do not apply to a pack-
aging bearing a label if that packaging 
is: 

(1) Unused or cleaned and purged of 

all residue; 

(2) Transported in a transport vehicle 

or freight container in such a manner 
that the packaging is not visible dur-
ing transportation; and 

(3) Loaded by the shipper and un-

loaded by the shipper or consignee. 

[Amdt. 172–9, 41 FR 15996, Apr. 15, 1976, as 
amended by Amdt. 172–75, 47 FR 44471, Oct. 7, 
1982; Amdt. 172–77, 47 FR 54822, Dec. 6, 1982; 
Amdt. 172–94, 49 FR 38134, Sept. 27, 1984; 
Amdt. 172–100, 50 FR 41521, Oct. 11, 1985; 
Amdt. 172–123, 55 FR 52594, Dec. 21, 1990; 
Amdt. 172–132, 58 FR 50501, Sept. 27, 1993; 66 
FR 8647, Feb. 1, 2001; 66 FR 45379, Aug. 28, 
2001; 68 FR 75741, 75742, Dec. 31, 2003; 74 FR 
2252, Jan. 14, 2009] 

§ 172.402

Additional labeling require-

ments. 

(a) 

Subsidiary hazard labels. 

Each 

package containing a hazardous mate-
rial— 

(1) Shall be labeled with primary and 

subsidiary hazard labels as specified in 
column 6 of the § 172.101 table (unless 
excepted in paragraph (a)(2) of this sec-
tion); and 

(2)For other than Class 1 or Class 2 

materials (for subsidiary labeling re-
quirements for Class 1 or Class 2 mate-
rials see paragraph (e) or paragraphs (f) 
and (g), respectively, of this section), if 
not already labeled under paragraph 
(a)(1) of this section, shall be labeled 
with subsidiary hazard labels in ac-
cordance with the following table: 

S

UBSIDIARY

H

AZARD

L

ABELS

 

Subsidiary hazard 

level (packing 

group) 

Subsidiary Hazard (Class or Division) 

3 

4.1 

4.2 

4.3 

5.1 

6.1 

8 

I ...........................

X 

*** 

*** 

X 

X 

X 

X 

II ..........................

X 

X 

X 

X 

X 

X 

X 

III .........................

* 

X 

X 

X 

X 

X 

X 

X—Required for all modes. 
*—Required for all modes, except for a material with a flash 

point at or above 38 

°

C (100 

°

F) transported by rail or high-

way. 

**—Reserved 
***—Impossible as subsidiary hazard. 

(b) 

Display of hazard class on labels. 

The appropriate hazard class or divi-
sion number must be displayed in the 
lower corner of a primary hazard label 
and a subsidiary hazard label. 

(c) 

Cargo Aircraft Only label. 

Each per-

son who offers for transportation or 
transports by aircraft a package con-
taining a hazardous material which is 
authorized on cargo aircraft only shall 
label the package with a CARGO AIR-
CRAFT ONLY label specified in 
§ 172.448 of this subpart.