| Customization: | Available |
|---|---|
| CAS No.: | 2321-07-5 |
| Formula: | C20h12o5 |
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Factory price fluorescein with powder dye cas 2321-07-5
| Fluorescein Basic information | |
| Product Name: | Fluorescein |
| CAS: | 2321/7/5 |
| MF: | C20H12O5 |
| MW: | 332.31 |
| EINECS: | 219-031-8 |
| Fluorescein Chemical Properties | |
| Melting point | 320 °C(lit.) |
| Boiling point | 429.44°C (rough estimate) |
| density | 1.2739 (rough estimate) |
| refractive index | 1.5000 (estimate) |
| storage temp. | −20°C |
| solubility | Solubility Insoluble in water, ether, benzene, chloroform; soluble in ethanol, methanol, acetone, Iethyl acetate, N,N-dimethylformamide |
| Colour Index | 45350 |
| form | Powder |
| pka | 2.2, 4.4, 6.7(at 25ºC) |
| color | Red to orange |
| PH Range | Pink uorescence (4.0) to green uorescence (6.0) |
| Water Solubility | insoluble |
| λmax | 493.5nm, 496nm, 460nm, 515nm |
| Merck | 144,159 |
| BRN | 94324 |
| Item | Specification |
| maximum absorption wavelength, λ(PH8.0), nm | 490-493 |
| mass absorption coefficient, λ(PH8.0),L/(cm·g) ≥ | 200 |
| Solubility in ethanol | Pass |
| sensitivity test | Pass |
| loss on drying, % ≤ | 5 |
| Burning residue (in sulfate), % ≤ | 0.3 |
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