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| | 4',5'-DIBROMOFLUORESCEIN Basic information |
| Product Name: | 4',5'-DIBROMOFLUORESCEIN | | Synonyms: | Dibromofluorescein (contains Mono-, Tri- and Tetra-);4′,5′-Dibromofluorescein,Solvent Red72;SOLVENT RED 72;4',5'-Dibromof;4',5'-DibroMofluorescein, ca. 95% dye content;4’,5’-dibromo-fluorescei;4’,5’-dibromofluororescein;9’-(9H)xanthen)-3-one,4’,5’-dibromo-3’,6’-dihydroxy-Spiro(isobenzofuran-1(3H) | | CAS: | 596-03-2 | | MF: | C20H10Br2O5 | | MW: | 490.1 | | EINECS: | 209-876-0 | | Product Categories: | | | Mol File: | 596-03-2.mol |  |
| | 4',5'-DIBROMOFLUORESCEIN Chemical Properties |
| Melting point | 270-273 °C(lit.) | | Boiling point | 633.7±55.0 °C(Predicted) | | density | 1.6743 (rough estimate) | | vapor pressure | 0Pa at 25℃ | | refractive index | 1.5010 (estimate) | | storage temp. | Sealed in dry,Room Temperature | | pka | 8.14±0.20(Predicted) | | Colour Index | 45370 | | form | powder to crystal | | color | Light yellow to Brown | | Water Solubility | 153.49μg/L at 25℃ | | λmax | 450 nm | | ε(extinction coefficient) | ≥5000 at 445-451nm
≥50000 at 227-233nm | | Merck | 14,3022 | | BRN | 57189 | | CAS DataBase Reference | 596-03-2(CAS DataBase Reference) | | EPA Substance Registry System | |
| | 4',5'-DIBROMOFLUORESCEIN Usage And Synthesis |
| Chemical Properties | orange powder | | Uses | 4'',5''-Dibromofluorescein is a stain with an absorption maximum of 450 nm. Dyes and metabolites, Environmental Testing | | Preparation | Fluorescein (C.I. Acid Yellow 73, C.I. 45350) in the sodium hydroxide solution two bromination, and??made into a free acid form. | | Safety Profile | Poison by ingestion and
intravenous routes. An herbicide. When
heated to decomposition it emits highly
toxic fumes of NOx, CN-, and Br-. See also
NITRILES. | | Purification Methods | Crystallise it from aqueous 30% EtOH. [Beilstein 19/6 V 462.] | | Properties and Applications | brilliant yellow light yellow. Slightly soluble in water for orange, with weak yellow fluorescence, soluble in ethanol for orange, with green yellow fluorescence, soluble in acetone peachblossom, with yellow fluorescence, soluble in Tetrahydrofurfuryl alcohol. In concentrated sulfuric acid to red light yellow, dilution after yellow brown, with orange precipitation. Dye aqueous solution to join sodium hydroxide as red edge; In the glycerol and liquid paraffin in good dispersibility. Used in medicines and cosmetics coloring. |
| | 4',5'-DIBROMOFLUORESCEIN Preparation Products And Raw materials |
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