| Chemical name | Found in | Role |
| Ammonium Hydroxide | Various | pH agent |
| Benzotriazole | Developer | Organic antifoggant / restrainer |
| Citric Acid | Various | pH agent |
| Ferric Ammonium Citrate | Van Dyke, cyanotype sensitizers | Sensitizing agent |
| Ferric Ammonium Oxalate | "New" cyanotype sensitizer | Sensitizing agent |
| Gelatin | Photographic emulsion | Emulsifier |
| Glyoxal 40% | Photographic emulsion | Hardener |
| Hydroquinone | Developer | Developing agent |
| Oxalic Acid | Platinum / palladium sensitizer | Sensitizing component |
| Palladium Chloride | Platinum / palladium sensitizer | Sensitizing component |
| 1-phenyl-3-pyrazolidinone (Phenidone) | Developer | Developing agent |
| Platinum Chloride | Platinum / palladium sensitizer | Sensitizing component |
| Potassium Bromide | Developer, photographic emulsion | Inorganic antifoggant / restrainer |
| Potassium Chlorate | Platinum / palladium sensitizer | Sensitizing agent |
| Potassium Dichromate | Various | Oxidizing / reduction agent |
| Potassium Ferricyanide | Various | Oxidizing / reduction agent |
| Potassium Hydroxide | Developer | pH agent |
| Potassium Iodide | Hypo-Check, photographic emulsion | Aqueous silver indicator, silver halide dopant |
| Potassium Oxalate | Platinum / palladium printing | Developing agent |
| Silver Nitrate | Various, photographic emulsion | Basic light-sensitive compound |
| Sodium Bisulfite | Developer | pH buffer, preservative |
| Sodium Hydroxide | Developer | pH agent |
| Sodium Sulfite | Developer | pH buffer, preservative, silver solvent |
| Sodium Thiosulfate | Fixer | Silver halide solvent |
| Tartaric Acid | Van Dyke sensitizer | Sensitizing component |
| Water | Various | Solvent |
Compiled 2008-05-05 by Conor Peterson and Sadie Lifton