| Identification | |
| Name: | Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one,3',6'-dihydroxy-, potassium salt (1:2) |
| Synonyms: | Fluorescein,dipotassium salt (8CI); Fluorescein, potassium deriv., potassium salt (7CI);Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 3',6'-dihydroxy-, dipotassiumsalt (9CI); 12417 Yellow; C.I. 45350 dipotassium salt; D and C Yellow No. 9;Japan Yellow 202(2); Uranin K |
| CAS: | 6417-85-2 |
| EINECS: | 229-143-9 |
| Molecular Formula: | C20H12 O5 . 2 K |
| Molecular Weight: | 408.49 |
| InChI: | InChI=1/C20H12O5.2K/c21-11-5-7-15-17(9-11)25-18-10-12(22)6-8-16(18)19(15)13-3-1-2-4-14(13)20(23)24;;/h1-10,21H,(H,23,24);;/q;2*+1/p-2 |
| Molecular Structure: |  |
| Properties | |
| Melting Point: | 315 deg C (decomposes) |
| Solubility: | Slightly soluble in ethanol, diethyl ether; very soluble in acetone; soluble in pyridine, methanol Insoluble in benzene, chloroform, ether. Soluble in hot alcohol or glacial acetic acid; also soluble in alkali hydroxides or carbonates with a bright green fluorescence appearing red by transmitted light. In water, 0.05 g/L at 20 deg C |
| Color: | Red, orthorhombic prisms Yellowish-red to red powder Orange-red, crystalline powder |
| Safety Data | |
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