49 CFR 173.195 - Hydrogen cyanide, anhydrous, stabilized (hydrocyanic acid, aqueous solution).

Status message

There are 8 Updates appearing in the Federal Register for 49 CFR 173. View below or at eCFR (GPOAccess)
§ 173.195 Hydrogen cyanide, anhydrous, stabilized (hydrocyanic acid, aqueous solution).
(a) Hydrogen cyanide, anhydrous, stabilized, must be packed in specification cylinders or UN pressure receptacles as follows:
(1) As prescribed in § 173.192;
(2) Specification 3A480, 3A480X, 3AA480, or 3A1800 metal cylinders of not over 126 kg (278 pounds) water capacity (nominal);
(3) Shipments in 3AL cylinders are authorized only when transported by highway and rail; or
(4) UN cylinders, as specified in part 178, with a minimum test pressure of 100 bar and a maximum filling ratio of 0.55. The use of UN tubes and MEGCs is not authorized.
(b) Cylinders may not be charged with more than 0.27 kg (0.6 pound) of liquid per 0.45 kg (1 pound) water capacity of cylinder. Each filled cylinder must be tested for leakage before being offered for transportation or transported and must show absolutely no leakage; this test must consist of passing a piece of Guignard's sodium picrate paper over the closure of the cylinder, without the protection cap attached, to detect any escape of hydrogen cyanide from the cylinder. Other equally efficient test methods may be used in place of sodium picrate paper.
(c) Packagings for hydrogen cyanide must conform to § 173.40.
[Amdt. 173-224, 55 FR 52643, Dec. 21, 1990, as amended at 56 FR 66271, Dec. 20, 1991; 71 FR 33880, June 12, 2006]

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.

  • 2014-08-06; vol. 79 # 151 - Wednesday, August 6, 2014
    1. 79 FR 46012 - Hazardous Materials: Transportation of Lithium Batteries
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Pipeline and Hazardous Materials Safety Administration
      Final rule.
      Effective Date: August 6, 2014. Voluntary Compliance Date: Voluntary compliance with all amendments is authorized August 6, 2014. Delayed Compliance Date: Unless otherwise specified, compliance with the amendments adopted in this final rule is February 6, 2015. The incorporation by reference of certain publications listed in the rule is approved by the Director of the Federal Register as of August 6, 2014.
      49 CFR Parts 171, 172, 173, 175

This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.

This list is taken from the Parallel Table of Authorities and Rules provided by GPO [Government Printing Office].

It is not guaranteed to be accurate or up-to-date, though we do refresh the database weekly. More limitations on accuracy are described at the GPO site.


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.

  • 2014-08-06; vol. 79 # 151 - Wednesday, August 6, 2014
    1. 79 FR 46012 - Hazardous Materials: Transportation of Lithium Batteries
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Pipeline and Hazardous Materials Safety Administration
      Final rule.
      Effective Date: August 6, 2014. Voluntary Compliance Date: Voluntary compliance with all amendments is authorized August 6, 2014. Delayed Compliance Date: Unless otherwise specified, compliance with the amendments adopted in this final rule is February 6, 2015. The incorporation by reference of certain publications listed in the rule is approved by the Director of the Federal Register as of August 6, 2014.
      49 CFR Parts 171, 172, 173, 175