| Chem. thread | 12 |
| Chem. unit | 10 |
| Chem. units | 11 |
| Chem., e.g. | 11 |
| Chem., for one | 14 |
| Chem., geol., etc. | 18 |
| Chem., phys., biol., etc. | 25 |
| Chemical compound in fertilizers and plastics | 46 |
| Chemical suffix | 16 |
| Chemical "anagram" | 28 |
| Chemical "twin" | 25 |
| Chemical abbr. | 14 |
| Chemical action | 15 |
| Chemical agent for climate change | 33 |
| Chemical alcohol | 16 |
| Chemical Ali e.g. | 17 |
| Chemical Ali, e.g. | 18 |
| Chemical alkaloid | 17 |
| Chemical analogues | 18 |
| Chemical analyses, as of metal content | 38 |
| Chemical analysis | 17 |
| Chemical analysis aids | 22 |
| Chemical apparatuses | 20 |
| Chemical banned by the EPA | 26 |
| Chemical banned by the EPA in 1977 | 34 |
| Chemical base | 13 |
| Chemical base: Abbr. | 20 |
| Chemical bonding attractor | 26 |
| Chemical bonding number | 23 |
| Chemical bonds | 14 |
| Chemical Brothers "___ Planet Dust" | 45 |
| Chemical building block | 23 |
| Chemical building blocks | 24 |
| Chemical carbon | 15 |
| Chemical change | 15 |
| Chemical change catalyst | 24 |
| Chemical coloring | 17 |
| Chemical combining form | 23 |
| Chemical company known for paint | 32 |
| Chemical compound | 17 |
| Chemical compound form | 22 |
| Chemical compound group | 23 |
| Chemical compound in "poppers" | 40 |
| Chemical compound or anagram for steer | 38 |
| Chemical compound resembling another one | 40 |
| Chemical compound suffix | 24 |
| Chemical compound: Abbr. | 24 |
| Chemical compound: comb. form | 29 |
| Chemical compound: Suffix | 25 |
| Chemical compounds | 18 |
| Chemical compounds in tea | 25 |
| Chemical compounds resembling others | 36 |
| Chemical conclusion | 19 |
| Chemical conjunction? | 21 |
| Chemical connection that involves a transfer of electrons | 57 |
| Chemical container | 18 |
| Chemical contaminant, for short | 31 |
| Chemical cousin | 15 |
| Chemical cousins | 16 |
| Chemical defense | 16 |
| Chemical designations | 21 |
| Chemical discovery of 1898 | 26 |
| Chemical dropper | 16 |
| Chemical dumping, e.g. | 22 |
| Chemical element | 16 |
| Chemical element #38 (also part of the name of a pre-Police Sting/Stewart Copeland band) | 89 |
| Chemical element linked to lung cancer | 38 |
| Chemical element with the shortest name | 39 |
| Chemical element with the symbol Fe | 35 |
| Chemical elements | 17 |
| Chemical ender | 14 |
| Chemical ending | 15 |
| Chemical ending or compound | 27 |
| Chemical endings | 16 |
| Chemical enzymes | 16 |
| Chemical esters | 15 |
| Chemical experiment substances | 30 |
| Chemical extractions | 20 |
| Chemical extracts | 17 |
| Chemical featured at some modern dispensaries | 45 |
| Chemical featured on a 1989 "60 Minutes" segment | 58 |
| Chemical find of 1943 | 21 |
| Chemical first used as a dye | 28 |
| Chemical flower? | 16 |
| Chemical formula for sodium hydroxide | 37 |
| Chemical found in rocket propellants | 36 |
| Chemical giant | 14 |
| Chemical group | 14 |
| Chemical group derived from benzene | 35 |
| Chemical group that includes sodium and lithium (with a hidden fruit) | 69 |
| Chemical hydrocarbon | 20 |
| Chemical in biodiesel factories | 31 |
| Chemical in drain cleaners | 26 |
| Chemical in Drano | 17 |
| Chemical in fertilizer | 22 |
| Chemical in nail-polish removers | 32 |
| Chemical in the dumbest diet ever? | 34 |
| Chemical initials | 17 |
| Chemical kin | 12 |
| Chemical leftovers | 18 |