 1 Inorganic materials |  |
| 2 Organic materials | |
| 3 Materials for product operation | |
| M-40 Materials for product operation | |
| | M-400 | Refrigerant gases and cryogens and other greenhouse gases | |
| | M-409 | Other gases | |
| | M-410 | Oils and greases | |
| | M-411 | Fuels | |
| | M-429 | Other liquids | |
| | M-449 | Other substances or mixtures for product operation | |