| 1/00 | Oxides or hydroxides of sodium, potassium, or alkali metals in general |
| 1/02 | Oxides or hydroxides of sodium, potassium, or alkali metals in general Oxides |
| 1/04 | Oxides or hydroxides of sodium, potassium, or alkali metals in general Hydroxides |
| 1/20 | Oxides or hydroxides of sodium, potassium, or alkali metals in general Hydroxides Preparation by reacting oxides or hydroxides with alkali metal salts |
| 1/22 | Oxides or hydroxides of sodium, potassium, or alkali metals in general Hydroxides Preparation by reacting oxides or hydroxides with alkali metal salts with carbonates or bicarbonates |
| 1/24 | Oxides or hydroxides of sodium, potassium, or alkali metals in general Hydroxides Preparation by reacting oxides or hydroxides with alkali metal salts from or via fluorides or silico-fluorides |
| 1/26 | Oxides or hydroxides of sodium, potassium, or alkali metals in general Hydroxides Preparation from or via cyano compounds, e.g. cyanides, cyanamides |
| 1/28 | Oxides or hydroxides of sodium, potassium, or alkali metals in general Hydroxides Purification; Separation |
| 1/30 | Oxides or hydroxides of sodium, potassium, or alkali metals in general Hydroxides Purification; Separation by crystallisation |
| 1/32 | Oxides or hydroxides of sodium, potassium, or alkali metals in general Hydroxides Purification; Separation by adsorption or precipitation |
| 1/34 | Oxides or hydroxides of sodium, potassium, or alkali metals in general Hydroxides Purification; Separation with selective solvents |
| 1/36 | Oxides or hydroxides of sodium, potassium, or alkali metals in general Hydroxides Purification; Separation by oxidation |
| 1/38 | Oxides or hydroxides of sodium, potassium, or alkali metals in general Hydroxides Purification; Separation by dialysis |
| 1/40 | Oxides or hydroxides of sodium, potassium, or alkali metals in general Hydroxides Purification; Separation by electrolysis |
| 1/42 | Oxides or hydroxides of sodium, potassium, or alkali metals in general Hydroxides Concentration; Dehydration |
| 1/44 | Oxides or hydroxides of sodium, potassium, or alkali metals in general Hydroxides Preparation in the form of granules, pieces, or other shaped products |
| 3/00 | Halides of sodium, potassium, or alkali metals in general |
| 3/02 | Halides of sodium, potassium, or alkali metals in general Fluorides |
| 3/04 | Halides of sodium, potassium, or alkali metals in general Chlorides |
| 3/06 | Halides of sodium, potassium, or alkali metals in general Chlorides Preparation by working up brines, seawater or spent lyes |