P404 PACKING INSTRUCTION P404
This instruction applies to pyrophoric solids: UN Nos. 1383, 1854, 1855, 2008, 2441, 2545, 2546, 2846, 2881, 3200, 3391 and 3393.

The following packagings are authorized, provided that the general provisions of 4.1.1 and 4.1.3 are met:

  1. Combination packagings

    Outer packagings: (1A1, 1A2, 1B1, 1B2, 1N1, 1N2, 1H1, 1H2, 1D, 1G, 4A, 4B, 4N, 4C1, 4C2, 4D, 4F, 4G or 4H2)

    Inner packagings: Metal receptacles with a maximum net mass of 15 kg each.

    Inner packagings shall be hermetically sealed and have threaded closures;

    Glass receptacles, with a maximum net mass of 1 kg each, having threaded closures with gaskets, cushioned on all sides and contained in hermetically sealed metal cans.

    Outer packagings shall have a maximum net mass of 125 kg.

  2. Metal packagings: (1A1, 1A2, 1B1, 1N1, 1N2, 3A1, 3A2, 3B1 and 3B2)

    Maximum gross mass: 150 kg

  3. Composite packagings: Plastics receptacle in a steel or aluminium drum (6HA1 or 6HB1)

    Maximum gross mass: 150 kg

Pressure receptacles may be used provided that the general provisions of 4.1.3.6 are met.

Special packing provisions:

PP31
For UN Nos. 1383, 1854, 1855, 2008, 2441, 2545, 2546, 2846, 2881 and 3200, packagings shall be hermetically sealed.
PP86
For UN 3391 and UN 3393, air shall be eliminated from the vapour space by nitrogen or other means.