| 2830 | | Sulfides; polysulfides, whether or not chemically defined: | | | | |
| 2830.90.10 | 00 | Zinc sulfide, luminescent grade having a purity of 99.99 percent or more by weight | kg | Free | | 11% |
| 2831 | | Dithionites and sulfoxylates: | | | | |
| 2831.10.10 | 00 | Sodium formaldehyde sulfoxylate | kg | Free | | 35% |
| 2832 | | Sulfites; thiosulfates: | | | | |
| 2833 | | Sulfates; alums; peroxosulfates (persulfates): | | | | |
| 2833.40 | | Peroxosulfates (persulfates): | | | | |
| 2835 | | Phosphinates (hypophosphites), phosphonates (phos- phites) and phosphates; polyphosphates, whether or not chemically defined: | | | | |
| 2835.10.00 | 00 | Phosphinates (hypophosphites) and phosphonates (phosphites) | kg | 3.1% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 25% |
| 2835.22.00 | 00 | Of mono- or disodium | kg | 1.4% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 6% |
| 2835.25.00 | 00 | Calcium hydrogenorthophosphate ("Dicalcium phosphate") | kg | Free | | 25% |
| 2835.26.00 | 00 | Other phosphates of calcium | kg | Free | | 25% |
| 2835.31.00 | 00 | Sodium triphosphate (Sodium tripolyphosphate) | kg | 1.4% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 6% |
| 2836 | | Carbonates; peroxocarbonates (percarbonates); commercial ammonium carbonate containing ammonium carbamate: | | | | |
| 2836.30.00 | 00 | Sodium hydrogencarbonate (Sodium bicarbonate) | kg | Free | | Free |
| 2836.40 | | Potassium carbonates: | | | | |
| 2836.40.10 | 00 | Dipotassium carbonate | kg | 1.9% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 6% |
| 2836.40.20 | 00 | Potassium hydrogencarbonate (Potassium bicarbonate) | kg | 1.3% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 4.8% |
| 2836.99.30 | 00 | Commercial ammonium carbonate and other ammonium carbonates | kg | 1.7% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 16% |
| 2837 | | Cyanides, cyanide oxides and complex cyanides: | | | | |
| 2837.11.00 | 00 | Cyanides and cyanide oxides: | | | | |
| 2837.20.10 | 00 | Potassium ferricyanide | kg | 1.1% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 5.1% |
| 2839 | | Silicates; commercial alkali metal silicates: | | | | |
| 2839.11.00 | 00 | Sodium metasilicates | kg | 1.1% | Free (A,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 3% |
| 2840 | | Borates; peroxoborates (perborates): | | | | |
