[Code of Federal Regulations]
[Title 49, Volume 2]
[Revised as of October 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR173.121]

[Page 507]
 
                        TITLE 49--TRANSPORTATION
 
   CHAPTER I--PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, 
                      DEPARTMENT OF TRANSPORTATION
 
PART 173_SHIPPERS_GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS--
Table of Contents
 
  Subpart D_Definitions Classification, Packing Group Assignments and 
    Exceptions for Hazardous Materials Other Than Class 1 and Class 7
 
Sec.  173.121  Class 3--Assignment of packing group.

    (a) The packing group of a Class 3 material is as assigned in column 
5 of the Sec.  172.101 table. When the Sec.  172.101 table provides more 
than one packing group for a hazardous material, the packing group shall 
be determined by applying the following criteria:

------------------------------------------------------------------------
                                  Flash point (closed-   Initial boiling
          Packing group                   cup)                point
------------------------------------------------------------------------
I...............................  ....................  <=35[deg]C (95
                                                         [deg]F)
II..............................  <23[deg]C (73         35
                                   [deg]F).              [deg]C (95
                                                         [deg]F)
III.............................  =23        35
                                   [deg]C, <=60 [deg]C   [deg]C (95
                                   (=73       [deg]F)
                                   [deg]F, <=140
                                   [deg]F).
------------------------------------------------------------------------

    (b) Criteria for inclusion of viscous Class 3 materials in Packing 
Group III. (1) Viscous Class 3 materials in Packing Group II with a 
flash point of less than 23 [deg]C (73 [deg]F) may be grouped in Packing 
Group III provided that--
    (i) Less than 3 percent of the clear solvent layer separates in the 
solvent separation test;
    (ii) The mixture does not contain any substances with a primary or a 
subsidiary risk of Division 6.1 or Class 8;
    (iii) The capacity of the packaging is not more than 30 L (7.9 
gallons); and
    (iv) The viscosity and flash point are in accordance with the 
following table:

------------------------------------------------------------------------
                                         Jet
       Flow time t in seconds        diameter in     Flash point c.c.
                                          mm
------------------------------------------------------------------------
20