49 CFR 173.116 - Class 2

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There are 10 Updates appearing in the Federal Register for 49 CFR 173. View below or at eCFR (GPOAccess)
§ 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 § 172.101 table. There are no hazard zones for Divisions 2.1 and 2.2. When the § 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 § 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]

Title 49 published on 2013-10-01

The following are only the Rules published in the Federal Register after the published date of Title 49.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2014-09-24; vol. 79 # 185 - Wednesday, September 24, 2014
    1. 79 FR 56988 - Clarification on Fireworks Policy Regarding Display Aerial Shells With Attachments
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      DEPARTMENT OF TRANSPORTATION, Pipeline and Hazardous Materials Safety Administration
      Clarification.
      September 24, 2014.
      49 CFR Part 173

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United States Code

Title 49 published on 2013-10-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 49 CFR 173 after this date.

  • 2014-09-25; vol. 79 # 186 - Thursday, September 25, 2014
    1. 79 FR 57494 - Hazardous Materials: Reverse Logistics (RRR).
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      DEPARTMENT OF TRANSPORTATION, Pipeline and Hazardous Materials Safety Administration
      Notice of proposed rulemaking. Extension of comment period.
      The comment period for the NPRM published August 11, 2014, at 79 FR 46748, is extended from October 10, 2014, until November 10, 2014. To the extent possible, PHMSA will consider late-filed comments.
      49 CFR Parts 171 and 173