
Luminol, chemically known as 3-aminophthalhydrazide (also known as 5-amino-2,3-dihydro-1,4-phthalazinedione), also known as luminol, is a yellow crystalline powdery organic compound with the molecular formula C₈H₇N₃O₂ and a molecular weight of 177.16. Its key characteristic is the production of blue chemiluminescence when it reacts with an oxidizing agent under alkaline conditions. It exhibits extremely high sensitivity and serves as a core reagent in the field of chemiluminescence analysis. It is widely used in criminal investigation, biomedicine, environmental monitoring, and other fields, acting as a crucial functional molecule that bridges organic synthesis and analytical detection.
| Item | Specification |
| Melting point | 329–332°C |
| Boiling Point | 621.9°C at 760 mmHg |
| Density | 1.433 g/cm³ (25°C) |
| Flash point | 329.9°C |
| Solubility | Easily soluble in alkaline solutions; soluble in hot acetic acid; slightly soluble in water (<0.1 g/100 mL, 19°C); sparingly soluble in alcohols and ethers. |
| Fluorescence Properties | Emits bright blue fluorescence under UV light in neutral or slightly acidic solutions |
| Stability | Stable at room temperature; sensitive to air; must be stored in a sealed container away from light. |
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