49 CFR 173.158 - Nitric acid.

Status message

There are 10 Updates appearing in the Federal Register for 49 CFR 173. View below or at eCFR (GPOAccess)
prev | next
§ 173.158 Nitric acid.
(a) Nitric acid exceeding 40 percent concentration may not be packaged with any other material.
(b) Nitric acid in any concentration which does not contain sulfuric acid or hydrochloric acid as impurities, when offered for transportation or transported by rail, highway, or water shall be packaged in specification containers as follows:
(1) 1A1 stainless steel drums are authorized, subject to the following limitations:
(i) Stainless steel used in drums must conform to the following thicknesses:
Nominal (marked) capacity (in liters) of 1A1 drum Minimum thickness (in mm) of stainless steel
55 0.9
115 1.2
210 1.5
450 2.0
(ii) Drums weighing less than 85 percent of their original tare weight may not be used.
(iii) Type 304 or other grades of equivalent corrosion-resistant steels in the as-welded condition are permissible for nitric acid concentrations up to and including 78 percent.
(iv) For all concentrations of nitric acid, the following are permissible:
(A) Type 304 heat-treated (quenched in water at 1040 °C (1900 °F)),
(B) Stabilized Type 347 in the as-welded condition,
(C) Stabilized Type 347 stress-relieved (845-900 °C (1550-1650 °F)),
(D) Stabilized Type 347 heat-treated (quenched in water at 1040 °C (1900 °F)), or
(E) Other grades of equivalent corrosion resistance.
(v) All parts of drum exposed to lading must be capable of withstanding the corrosive effect of nitric acid to the extent that 65 percent boiling nitric acid does not penetrate the metal more than 0.0381 mm (0.002 inches) per month. (ASTM A 262 may be used for a suitable corrosion test procedure.)
(vi) In addition to marking required by § 178.503 of this subchapter, the following marks, in lettering of at least 12.7 mm (0.5 inch) height, must be placed on drums used to transport nitric acid:
(A) The type of steel used in body and head sheets as identified by American Iron and Steel Institute type number, and, in addition, the letters “HT” following the steel designation on containers subject to stress relieving or heat treatment during manufacture.
(B) The thickness in mm of metal in thinnest part. When the thickness of metal in the body differs from that in the head, both must be indicated with slanting line between and with the gauge of the body indicated first.
(C) Original tare weight in kilograms, preceded by the letters “TW.”
An example of the markings required by paragraphs (b)(1)(vi) (A), (B), and (C) of this section is “304HT/1.9/2.7/TW55.”
(2) 4H1 expanded plastics outer packagings with glass inner receptacles of not greater than 2.5 L (0.66 gallon) capacity each. No more than four 2.5 L (0.66 gallon) inner receptacles may be packed in one outer packaging.
(c) Nitric acid of 80 percent or greater concentration which does not contain sulfuric acid or hydrochloric acid as impurities, when offered for transportation or transported by rail, highway, or water may be packaged in 1B1 aluminum drums.
(d) Nitric acid of 90 percent or greater concentration, when offered for transportation or transported by rail, highway, or water may be packaged as follows:
(1) In 4C1, 4C2, 4D or 4F wooden boxes with inner packagings consisting of glass bottles further individually overpacked in tightly closed metal packagings. Glass bottles must be of 2.5 L (0.66 gallon) or less capacity and cushioned with a non-reactive, absorbent material within the metal packagings.
(2) In combination packagings with 1A2, 1B2, 1D, 1G, 1H2, 3H2 or 4G outer packagings with inner glass packagings of 2.5 L (0.66 gallons) or less capacity cushioned with a non-reactive, absorbent material and packed within a tightly closed intermediate packaging of metal or plastic.
(e) Nitric acid of less than 90 percent concentration, when offered for transportation or transported by rail, highway, or water may be packaged in 4G fiberboard boxes or 4C1, 4C2, 4D or 4F wooden boxes with inside glass packagings of not over 2.5 L (0.66 gallon) capacity each.
(f) Nitric acid of 70 percent or less concentration, when offered for transportation or transported by rail, highway, or water, may be packaged as follows:
(1) In composite packagings 6PA1, 6PA2, 6PB1, 6PB2, 6PC, 6PD1, 6PH1, or 6PH2. 6HH1 and 6HA1 composite packaging with plastic inner receptacles meeting the compatibility requirements § 173.24(e) (e.g., PFA Teflon) are authorized.
(2) In 4H1 expanded plastic boxes with inner glass packagings of not over 2.5 L (0.66 gallon) each.
(3) In combination packagings with 1A2, 1B2, 1D, 1G, 1H2, 3H2, 4C1, 4C2, 4D, 4F or 4G outer packagings and plastic inner packagings not over 2.5 L (0.66 gallon) capacity further individually overpacked in tightly closed metal packagings.
(g) Nitric acid of more than 70 percent concentration, when offered for transportation or transported by cargo aircraft only, must be packaged in combination packagings with 1A2, 1B2, 1D, 1G, 1H2, 3H2, 4C1, 4C2, 4D, 4F or 4G outer packagings with glass or earthenware inner packagings of not over 1 L (0.3 gallon) or glass ampoules of not over 0.5 L (0.1 gallon).
(h) Nitric acid of less than 70 percent concentration, when offered for transportation in cargo aircraft only must be packaged in combination packagings with 1A2, 1B2, 1D, 1G, 1H2, 3H2, 4C1, 4C2, 4D, 4F or 4G outer packagings with inner packagings of—
(1) Glass or earthenware not over 2.5 L (0.66 gallon) capacity;
(2) Plastic not over 2.5 L (0.66 gallon) capacity further individually overpacked in tightly closed metal packagings; or
(3) Glass ampoule not over 0.5 L (0.1 gallon) capacity.
[Amdt. 173-224, 55 FR 52643, Dec. 21, 1990, as amended at 56 FR 66270, Dec. 20, 1991; Amdt. 173-241, 59 FR 67509, Dec. 29, 1994; Amdt. 173-255, 61 FR 50626, Sept. 26, 1996; 68 FR 75744, Dec. 31, 2003]

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
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Pipeline and Hazardous Materials Safety Administration
      Clarification.
      September 24, 2014.
      49 CFR Part 173

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.

  • 2014-09-25; vol. 79 # 186 - Thursday, September 25, 2014
    1. 79 FR 57494 - Hazardous Materials: Reverse Logistics (RRR).
      GPO FDSys XML | Text
      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