Rhodamine 123 is a membrane-permeable cationic green fluorescent dye that can be easily absorbed by active mitochondria without cytotoxicity. The maximum excitation/emission wavelength is 508nm/530nm, giving green fluorescence for observation of mitochondria, stored in refrigerators (-5 to -30°C) and protected from light.
| Molecular Weight | 380.82 |
| Formula | C21H17ClN2O3 |
| CAS Number | 62669-70-9 |
| Solubility (25°C) | DMSO ≥ 60 mg/mL |
| Storage | -20°C, protect from light, dry, sealed |
| Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
| Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
| Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
| Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
| Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
| Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
[4] Xiaofeng Bao, et al. Nucl Med Biol. [¹¹C]Rhodamine-123: synthesis and biodistribution in rodents
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