USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Interpretation Response #02-0205 ([California International Chemical Co., Inc.] [Karen Lowell,Esq.])

Below is the interpretation response detail and a list of regulations sections applicable to this response.

Interpretation Response Details

Response Publish Date:

Company Name: California International Chemical Co., Inc.

Individual Name: Karen Lowell,Esq.

Location State: CA Country: US

View the Interpretation Document

Response text:

Sep 23, 2002

Ms. Karen Lowell, Esq.                   Reference No. 02-0205
California International Chemical Co., Inc.
3450-C Regional Parkway
Santa Rosa, California 95403

Dear Ms. Lowell

This is in response to your July 25, 2002, letter regarding the identification number marking and placarding requirements under the Hazardous Materials Regulations (HMR; 49 CPR parts 171-180), for motor vehicle transporting 900 pounds or less of non-bulk packages of Chlorine, 2.3, UN 1017.

You are correct that the placard required for “Chlorine, 2.3, UN1017” is the POISON GAS placard in accordance with § 172.504(e), Table 1. Based on the total quantity of chlorine on the motor vehicle, 900 pounds or less aggregate gross weight of non-bulk packaging display of the identification number on the transport vehicle is not required.

Section l72.313(c) states in part that, a transport vehicle or freight container containing a material poisonous by inhalation in non-bulk packages shall be marked, on each side and each end as specified in § 172.332 or § 172.336, with the identification number specified for the hazardous material in the § 172.101 Table, subject to the following provisions and limitations.  The material is in Hazard Zone A or B and the transport vehicle or freight container is leaded at one facility with 1,000 kg (2,205 pounds) or more aggregate gross weight of the material in non-bulk packages marked with the same proper shipping name and identification number.

I hope this information is helpful.  Please contact us if you require additional assistance.


Delmer F. Billings
Chief, Standards Development
Office of Hazardous Materials Standards


Regulation Sections

Section Subject
172.504 General placarding requirements