IMDG Code prohibits certain type of packagings for substances which may become liquid during transport. Below are the list of packaging prohibited
Packagings
Drums: 1D and 1G
Boxes: 4C1, 4C2, 4D, 4F, 4G and 4H1
Bags: 5L1, 5L2, 5L3, 5H1, 5H2, 5H3, 5H4, 5M1 and 5M2
Composite: 6HC, 6HD2, 6HG1, 6HG2, 6HD1, 6PC, 6PD1, 6PD2, 6PG1, 6PG2 and 6PH1
Large packagings
Flexible plastics: 51H (outer packaging)
IBCs
For substances of packing group I:
All types of IBCs
For substances of packing groups II and III:
Wooden: 11C, 11D and 11F
Fibreboard: 11G
Flexible: 13H1, 13H2, 13H3, 13H4, 13H5, 13L1, 13L2, 13L3, 13L4, 13M1 and 13M2
Composite: 11HZ2 and 21HZ2.
IMDG Code Compliance Centre 