Special provisions

The special provision codes of 49 CFR 172.102 and the text of each.

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CodeCode familyText
N45 N Copper cartridges are authorized as inner packagings if the hazardous material is not in dispersion.
N65 N Outage must be sufficient to prevent cylinders or spheres from becoming liquid full at 55 °C (130 °F). The vacant space (outage) may be charged with a nonflammable nonliquefied compressed gas if the pressure in the cylinder or sphere at 55 °C (130 °F) does not exceed 125 percent of the marked service pressure.
N73 N Packagings consisting of outer wooden or fiberboard boxes with inner glass, metal or other strong containers; metal or fiber drums; kegs or barrels; or strong metal cans are authorized and need not conform to the requirements of part 178 of this subchapter.
N74 N Packages consisting of tightly closed inner containers of glass, earthenware, metal or polyethylene, capacity not over 0.5 kg (1.1 pounds) securely cushioned and packed in outer wooden barrels or wooden or fiberboard boxes, not over 15 kg (33 pounds) net weight, are authorized and need not conform to the requirements of part 178 of this subchapter.
N75 N Packages consisting of tightly closed inner packagings of glass, earthenware or metal, securely cushioned and packed in outer wooden barrels or wooden or fiberboard boxes, capacity not over 2.5 kg (5.5 pounds) net weight, are authorized and need not conform to the requirements of part 178 of this subchapter.
N76 N For materials of not more than 25 percent active ingredient by weight, packages consisting of inner metal packagings not greater than 250 mL (8 ounces) capacity each, packed in strong outer packagings together with sufficient absorbent material to completely absorb the liquid contents are authorized and need not conform to the requirements of part 178 of this subchapter.
N77 N For materials of not more than two percent active ingredients by weight, packagings need not conform to the requirements of part 178 of this subchapter, if liquid contents are absorbed in an inert material.
N78 N Packages consisting of inner glass, earthenware, or polyethylene or other nonfragile plastic bottles or jars not over 0.5 kg (1.1 pounds) capacity each, or metal cans not over five pounds capacity each, packed in outer wooden boxes, barrels or kegs, or fiberboard boxes are authorized and need not conform to the requirements of part 178 of this subchapter. Net weight of contents in fiberboard boxes may not exceed 29 kg (64 pounds). Net weight of contents in wooden boxes, barrels or kegs may not exceed 45 kg (99 pounds).
N79 N Packages consisting of tightly closed metal inner packagings not over 0.5 kg (1.1 pounds) capacity each, packed in outer wooden or fiberboard boxes, or wooden barrels, are authorized and need not conform to the requirements of part 178 of this subchapter. Net weight of contents may not exceed 15 kg (33 pounds).
N80 N Packages consisting of one inner metal can, not over 2.5 kg (5.5 pounds) capacity, packed in an outer wooden or fiberboard box, or a wooden barrel, are authorized and need not conform to the requirements of part 178 of this subchapter.
N82 N See § 173.115 of this subchapter for classification criteria for flammable aerosols.
N83 N This material may not be transported in quantities of more than 11.5 kg (25.4 lbs) per package.
N84 N The maximum quantity per package is 500 g (1.1 lbs.).
N85 N Packagings certified at the Packing Group I performance level may not be used.
N86 N UN pressure receptacles made of aluminum alloy are not authorized.
N87 N The use of copper valves on UN pressure receptacles is prohibited.
N88 N Any metal part of a UN pressure receptacle in contact with the contents may not contain more than 65% copper, with a tolerance of 1%.
N89 N When steel UN pressure receptacles are used, only those bearing the “H” mark are authorized.
N90 N Metal packagings are not authorized. Packagings of other material with a small amount of metal, for example metal closures or other metal fittings such as those mentioned in part 178 of this subchapter, are not considered metal packagings. Packagings of other material constructed with a small amount of metal must be designed such that the hazardous material does not contact the metal.
N91 N The use of a non specification sift-proof, non-bulk, metal can with or without lid, or a non specification sift-proof, non-bulk fiber drum, with or without lid is authorized when transporting coal tar pitch compounds by motor vehicle or rail freight. The fiber drum must to be fabricated with a three ply wall, as a minimum. The coal tar pitch compound must be in a solid mass during transportation.
N92 N Notwithstanding the provisions of § 173.24(g) of this subchapter, packagings shall be designed and constructed to permit the release of gas or vapor to prevent a build-up of pressure that could rupture the packagings in the event of loss of stabilization.
N95 N UN1075, Liquefied petroleum gas and UN1978, Propane authorized for transport in DOT 4BA240 cylinders is not subject to the UN identification number and proper shipping name marking or the label requirements of this part subject to the following conditions:
R1 R A person who offers for transportation tank cars containing sulfur, molten or residue of sulfur, molten may reference the Sulfur Institute's, “Molten Sulphur Rail Tank Car Guidance document” (see § 171.7 of this subchapter) to identify tank cars that may pose a risk in transportation due to the accumulation of formed, solid sulfur on the outside of the tank.
T1 T 1.5 § 178.274(d)(2) Normal § 178.275(d)(2)
T2 T 1.5 § 178.274(d)(2) Normal § 178.275(d)(3)
T3 T 2.65 § 178.274(d)(2) Normal § 178.275(d)(2)
T4 T 2.65 § 178.274(d)(2) Normal § 178.275(d)(3)
T5 T 2.65 § 178.274(d)(2) § 178.275(g)(3) Prohibited
T6 T 4 § 178.274(d)(2) Normal § 178.275(d)(2)
T7 T 4 § 178.274(d)(2) Normal § 178.275(d)(3)
T8 T 4 § 178.274(d)(2) Normal Prohibited
T9 T 4 6 mm Normal Prohibited for liquids.
T10 T 4 6 mm § 178.275(g)(3) Prohibited
T11 T 6 § 178.274(d)(2) Normal § 178.275(d)(3)
T12 T 6 § 178.274(d)(2) § 178.275(g)(3) § 178.275(d)(3)
T13 T 6 6 mm Normal Prohibited
T14 T 6 6 mm § 178.275(g)(3) Prohibited
T15 T 10 § 178.274(d)(2) Normal § 178.275(d)(3)
T16 T 10 § 178.274(d)(2) § 178.275(g)(3) § 178.275(d)(3)
T17 T 10 6 mm Normal § 178.275(d)(3)
T18 T 10 6 mm § 178.275(g)(3) § 178.275(d)(3)
T19 T 10 6 mm § 178.275(g)(3) Prohibited
T20 T 10 8 mm § 178.275(g)(3) Prohibited
T21 T 10 10 mm Normal Prohibited for liquids. § 178.275(d)(2).
T22 T 10 10 mm § 178.275(g)(3) Prohibited
T50 T When portable tank instruction T50 is indicated in Column (7) of the § 172.101 Hazardous Materials Table, the applicable liquefied compressed gas and chemical under pressure descriptions are authorized to be transported in portable tanks in accordance with the requirements of § 173.313 of this subchapter.
T75 T When portable tank instruction T75 is referenced in Column (7) of the § 172.101 Table, the applicable refrigerated liquefied gases are authorized to be transported in portable tanks in accordance with the requirements of § 178.277 of this subchapter.
TP1 TP The maximum degree of filling must not exceed the degree of filling determined by the following:
TP2 TP a. The maximum degree of filling must not exceed the degree of filling determined by the following:
TP3 TP The maximum degree of filling (in %) for solids transported above their melting points and for elevated temperature liquids shall be determined by the following:

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