Code of Federal Regulations Title 49. Transportation § 49.173.188 White or yellow phosphorus

(i) Inner hermetically sealed (soldered) metal cans, enclosed in other hermetically sealed (soldered) metal cans, or

(ii) Inner water-tight metal cans containing not over 0.5 kg (1 pound) of phosphorus with screw-top closures;  or

(3)(i) A 115 L (30 gallon) UN1A2 steel drum certified to the PG I performance level for solids and the PG I or PG II performance level for liquids and dual marked, at a minimum, as a UN1A2/X400/S (for solid) and UN1A2 X(or Y)/1.4/150 (for liquids) subject to the following conditions:

(ii) Enough water must be present in each drum to ensure that the phosphorous is covered by water at all times during transportation, in any orientation of the drum;

(iii) Drums must be held and observed for a minimum of 24–hours before transportation. Any leaking or otherwise unsuitable drums must be replaced prior to transportation;

(iv) Packages must be destroyed and may not be reused;

(v) The net mass of the material and water, in kilograms, must not exceed the mass that would be permitted by calculating the volume of the packaging in liters multiplied by the specific gravity indicated on the package certification;

(vi) Transportation is by private or contract motor carrier only;  and

(vii) Transportation is authorized from the offeror's location to a facility where it must be unloaded by the consignee.