| Code | Description |
|---|---|
| 811 | Sulphuric acid; oleum |
| 812 | Caustic soda and soda lye |
| 813 | Sodium carbonate (soda ash) |
| 814 | Calcium carbide |
| 819 | Other basic chemicals |
Heading of aggregated item NSTR agregada anglès to which it belongs
18 Basic chemicals. Aluminium oxide. Other chemical products