ADR packing instruction P503
Heading in ADR: “P503 PACKING INSTRUCTION”
Oxidizing solids: inners of 5 kg in drums or boxes up to 125 kg (4G 40 kg, 4H1 60 kg); single metal drums 250 kg, fibre/plywood lined drums 200 kg.
Combination packagings use glass, metal or plastics inners of up to 5 kg in drums or boxes of the listed types, generally up to 125 kg net, but 40 kg for fibreboard boxes (4G) and 60 kg for expanded plastics boxes (4H1). As single packagings, metal drums may hold up to 250 kg net, and fibre (1G) or plywood (1D) drums fitted with inner liners up to 200 kg net. General rules 4.1.1 and 4.1.3 apply.
| Type | Code | Packing groups | Max capacity (L) | Max net mass (kg) |
|---|---|---|---|---|
| combination: drums — inner: glass, metal or plastic, max 5 kg each | 1A1, 1A2, 1B1, 1B2, 1N1, 1N2, 1D, 1G, 1H1, 1H2 | — | — | 125 |
| combination: boxes — inner: max 5 kg each | 4A, 4B, 4N, 4C1, 4C2, 4D, 4F, 4H2 | — | — | 125 |
| combination: fibreboard boxes — inner: max 5 kg each | 4G | — | — | 40 |
| combination: expanded plastics boxes — inner: max 5 kg each | 4H1 | — | — | 60 |
| single: metal drums | 1A1, 1A2, 1B1, 1B2, 1N1, 1N2 | — | — | 250 |
| single: fibre or plywood drums with inner liners | 1G, 1D | — | — | 200 |
Note. The PDF limit column is offset by one row; the 40 kg and 60 kg limits were aligned to 4G and 4H1 by counting rows (6 drum, 10 box rows).
Refers to: 4.1.1; 4.1.3.
Carried by 7 Table A entries
UN 1479 · UN 1491 · UN 1504 · UN 2466 · UN 2547 · UN 3085 · UN 3087
Source: ADR 2025 (ECE/TRANS/352), Volume II, section 4.1.4.1, P503, page 119.
Paraphrase in FreightUtils' own words, not the official text. Not yet reviewed.
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