| Answer | Crossword Clue |
|---|---|
| TTC | Chemical abbr. |
| DNA | Chemical abbr. |
| PCB | Controversial chemical: Abbr. |
| ELEM | Chemical substance: Abbr. |
| COMP | Chemical substance. Abbr. |
| TDE | Chemical compound: Abbr. |
| ALK | Chemical base: Abbr. |
| PCB | Highly toxic chemical (abbr.) |
| BCE | Chemical engineering degree: Abbr. |
| MFR | Dow Chemical, e.g.: Abbr. |
| EDTA | Acid used in chemical analysis: Abbr. |
