| Sodium hydroxide in our home chemistry set | 42 |
| Soapmaking solution | 19 |
| Soap-making compound | 20 |
| Soap compound | 13 |
| Soap chemical | 13 |
| Soap base | 9 |
| Potash | 6 |
| Percolation solution | 20 |
| Oven-cleaning chemical | 22 |
| Oil partner in soapmaking | 25 |
| NaOH, familiarly | 16 |
| NaOH or KOH | 11 |
| Mark of the P.G.A. | 18 |
| KOH, to a layperson | 19 |
| It's KOH, chemically | 24 |
| It may go down the drain | 24 |
| Ingredient in the preparation of lutefisk | 41 |
| Ingredient in some cakes | 24 |
| Ingredient in Liquid-Plumr | 26 |
| Industrial-strength cleaner | 27 |
| Hydroxide | 9 |
| Housewife's cleanser | 24 |
| Hominy-making solution | 22 |
| Hominy bath | 11 |
| Homemade cleaner ingredient | 27 |
| Heavy Toronto band used for making soap? | 40 |
| Harsh cleanser | 14 |
| Harsh chemical | 14 |
| Hair remover? | 13 |
| Grease dissolver | 16 |
| Granny Clampett's soap ingredient | 37 |
| Grammas' _____ soap | 23 |
| Food-curing chemical | 20 |
| Familiar solution? | 18 |
| Eye burner | 10 |
| Drano component | 15 |
| Drainpipe cleaner | 17 |
| Drain-opener ingredient | 23 |
| Drain-clearing chemical | 23 |
| Drain-cleaner ingredient | 24 |
| Drain opener ingredient | 23 |
| Drain opener chemical | 21 |
| Drain cleaning chemical | 23 |
| Drain cleaner chemical | 22 |
| Corrosive cleaning liquid | 25 |
| Corrosive cleaner | 17 |
| Common caustic | 14 |
| Cleaning solution | 17 |
| Cleaner ingredient | 18 |
| Chemical used to make biodiesel | 31 |
| Chemical in drain cleaners | 26 |
| Chemical in biodiesel factories | 31 |
| Caustic stuff in Drano | 22 |
| Caustic soapmaking compound | 27 |
| Caustic potash, e.g. | 20 |
| Caustic liquid | 14 |
| Caustic fluid | 13 |
| Caustic drain-opener | 20 |
| Caustic drain unclogger | 23 |
| Caustic agent in soap | 21 |
| Caustic "Fight Club" substance | 40 |
| Cause of some skin burns | 24 |
| Burning stuff | 13 |
| Basic cleaner | 13 |
| Alkaline made from ashes | 24 |
| Alkali used in soapmaking | 25 |
| A solid caustic | 15 |
| A corrosive | 11 |
| "Fight Club" chemical | 31 |
| "Fight Club" agent | 28 |
| Scottish geologist | 18 |
| Geology pioneer Sir Charles ___ | 31 |
| 19th-century geologist Charles | 30 |
| 19th-century British geologist Sir Charles __ | 45 |
| Caustic solutions | 17 |
| Caustic substances | 18 |
| Caustic cleaners | 16 |
| They're rich in potassium carbonate | 39 |
| Caustics | 8 |
| Caustic compounds | 17 |
| Caustic chemicals | 17 |
| Soapmaking solutions | 20 |
| Cleaning agents | 15 |
| Caustic alkalis | 15 |
| Strong cleaners | 15 |
| Soap ingredients | 16 |
| Corrosive alkalis | 17 |
| Caustic cleansers | 17 |
| Soapmaking substances | 21 |
| Potassium and sodium hydroxides | 31 |
| Drain cleaners | 14 |
| Cleaning solutions | 18 |
| Caustic fluids | 14 |
| Alkaline solutions | 18 |
| Wood ash products | 17 |
| Strong solutions | 16 |
| Strong soap substances | 22 |
| Soapmaking compounds | 20 |
| Soapmaker's substances, perhaps | 35 |
| Lixivia | 7 |