Products Description of O‑Phenanthroline (CAS#66‑71‑7)
1,10‑Phenanthroline monohydrate belongs to the class of organic intermediates and occurs as fine white crystalline powder. This substance is widely adopted within analytical workflows, serving both as redox‑sensitive indicators and testing agents for quantifying metallic ions including ferrous species, palladium, vanadium, copper and iron elements.
The monohydrated variant delivers a density value of 1.10, alongside a melting‑point range of 93‑94°C. By comparison, its anhydrous counterpart melts at 117°C. Regarding dissolving performance, this compound can disperse within roughly 300‑fold volumes of water and 70‑fold volumes of benzene. It also exhibits good miscibility with ethyl alcohol, benzene as well as acetone, yet shows no dissolution capability when exposed to petroleum ether.
o-Phenanthroline Chemical Properties
| Melting point | 114-117 °C(lit.) |
| Boiling point | >330°C |
| Density | 1.1836 (rough estimate) |
| Refractive index | 1.5200 (estimate) |
| Fp | >330°C |
| Storage temp | Store below +30°C. |
| Solubility | 2.69g/l |
| Pka | 4.84(at 25℃) |
| Form | Powder |
| Color | White to light yellow or light pink |
| Water Solubility | slightly soluble |
| Sensitive | Hygroscopic |
| Merck | 147214 |
| BRN | 126461 |
| Stability | Stable. Hygroscopic. Store under nitrogen. Incompatible with strong acids, strong oxidizing agents. |
| InChIKey | DGEZNRSVGBDHLK-UHFFFAOYSA-N |
| CAS DataBase Reference | 66-71-7(CAS DataBase Reference) |
| NIST Chemistry Reference | o-Phenanthroline(66-71-7) |
| EPA Substance Registry System | 1,10-Phenanthroline (66-71-7) |
Safety Information
| Hazard Codes | T,N |
| Risk Statements | 25-50/53 |
| Safety Statements | 45-60-61 |
| RIDADR | UN 2811 6.1/PG 3 |
| WGK Germany | 3 |
| RTECS | SF8437000 |
| TSCA | Yes |
| HazardClass | 6.1 |
| PackingGroup | III |
| HS Code | 29339990 |
| Toxicity | dni-hmn:leu 5 mg/L ONCOBS 46,193,89 |
Product Application of O‑Phenanthroline (CAS#66‑71‑7)
1,10‑Phenanthroline acts as a prevalent ligand for metal spectroscopic assays and spectroscopic research targeting carbon dioxide reduction. It also participates in Cu(II)-promoted cross‑linking reactions of organoboronic acids. Besides these uses, it works as a redox indicator and analytical agent for titanium and iron quantification.
This chemical readily generates coordination complexes with metallic centers including iron, copper, cobalt and nickel. It can coordinate together with 2,2′‑bipyridine and develops a distinctive red complex upon binding Fe²⁺. Oxidation with potassium permanganate converts it into 2,2′‑dipyridyl‑3,3′‑dicarboxylic acid. Moreover, it serves as a colorimetric reagent for quantitative copper and iron testing, and is adopted as an end‑point indicator during titration of iron salts using cerium sulfate.
