Other inorganic acids and other inorganic oxygen compounds of nonmetals:
| Subheading | Description | General | Special | Other |
|---|---|---|---|---|
| 2811.11 | Other inorganic acids and other inorganic oxygen compounds of nonmetals | — | — | — |
| 2811.12 | Other inorganic acids and other inorganic oxygen compounds of nonmetals | — | — | — |
| Other inorganic acids: | ||||
| 2811.19 | Other: | — | — | — |
| 2811.21 | Other inorganic acids and other inorganic oxygen compounds of nonmetals | — | — | — |
| Other inorganic oxygen compounds of nonmetals: | ||||
| 2811.22 | Silicon dioxide: | — | — | — |
| 2811.29 | Other: | — | — | — |