| 28 | | | HS Code for Inorganic chemicals; inorganic or organic compounds of precious metals, radioactive elements, rare land metals or isotope metals |
| 2831 | | HS Code for Dithionites and sulphoxylates |
| | 28311010 | Sodium dithionite |
| | 28311020 | Sodium sulfoxylate |
| | 28319000 | Other hydrosulfite and hyposulfite |
| 2832 | | HS Code for Sulphites; thiosulphates |
| | 28321000 | Sodium sulfite |
| | 28322000 | Other sulfite |
| | 28323000 | Thiosulfate |
| 2833 | | HS Code for Sulphates; alums; peroxosulphates (persulphates) |
| | 28331100 | Sulfuric acid disodium |
| | 28331900 | Other sodium sulfate |
| | 28332100 | Magnesium |
| | 28332200 | Aluminum sulfate |
| | 28332400 | Nickel sulfate |
| | 28332500 | Copper sulfate |
| | 28332700 | Barium sulfate |
| | 28332910 | Ferrous sulfate |
| | 28332920 | Chromium sulfate |
| | 28332930 | Zinc sulfate |
| | 28332990 | Other sulphates |
| | 28333010 | Potassium alum |
| | 28333090 | Other alum |
| | 28334000 | Persulfate |
| 2834 | | HS Code for Nitrites; nitrates |
| | 28341000 | Nitrite |
| | 28342110 | Fertilizer with potassium nitrate |
| | 28342190 | Non-fertilizer with potassium nitrate |
Harmonized Tariff Schedule of China inquiry: textile
