[Code of Federal Regulations]

[Title 49, Volume 2]

[Revised as of October 1, 2005]

From the U.S. Government Printing Office via GPO Access

[CITE: 49CFR173.116]



[Page 495]

 

                        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. 173.116  Class 2--Assignment of hazard zone.



    (a) The hazard zone of a Class 2, Division 2.3 material is assigned 

in column 7 of the Sec. 172.101 table. There are no hazard zones for 

Divisions 2.1 and 2.2. When the Sec. 172.101 table provides more than 

one hazard zone for a Division 2.3 material, or indicates that the 

hazard zone be determined on the basis of the grouping criteria for 

Division 2.3, the hazard zone shall be determined by applying the 

following criteria:



------------------------------------------------------------------------

           Hazard zone                      Inhalation toxicity

------------------------------------------------------------------------

A................................  LC50 less than or equal to 200 ppm.

B................................  LC50 greater than 200 ppm and less

                                    than or equal to 1000 ppm.

C................................  LC50 greater than 1000 ppm and less

                                    than or equal to 3000 ppm.

D................................  LC50 greater than 3000 ppm or less

                                    than or equal to 5000 ppm.

------------------------------------------------------------------------



    (b) The criteria specified in paragraph (a) of this section are 

represented graphically in Sec. 173.133, Figure 1.



[Amdt. 173-224, 55 FR 52634, Dec. 21, 1990, as amended at 56 FR 66268, 

Dec. 20, 1991; Amdt. 173-138, 59 FR 49133, Sept. 26, 1994; 67 FR 61013, 

Sept. 27, 2002]