| IRONOXIDE | Rust, chemically speaking |
| OXIDE | Rust, chemically speaking |
| FERRIC | Like rust, chemically |
| OXIDES | Water, lime, and rust, chemically |
| IONIZE | Turn positive, chemically speaking |
| ZINC | "ZN" chemically speaking |
| TIN | Sn chemically speaking |
| ALKALIES | Bases, chemically speaking |
| HTO | Necessity for life, chemically speaking |
| ISOMER | Fraternal twin, chemically speaking |
| POLYMERS | Nylon and others, chemically speaking |
| BERYL | Emerald or aquamarine, chemically speaking |
| NONACID | Base, chemically speaking |
| AURUM | Gold, chemically speaking |
| ADSORB | Gather on the surface, chemically speaking |
| BUNSENBURNER | Tends to meet one's match, as is in a class of its own, chemically speaking (6,6) |
| SILVERLINING | Upside of 9-Across/65-Across ... and, chemically speaking, what each pair of circles represents |
| ANIONS | About half of table salt, chemically |
| IODIZING | Chemically treating, as table salt |
| KOH | Common caustic, chemically |
