Rhein Synonyms: 9,10-dihydro-4,5-dihydroxy-9,10-dioxo-2-anthracenecarboxylicaci;9,10-dihydro-4,5-dihydroxy-9,10-dioxo-2-anthroicaci;chrysazin-3-carboxylicacid;monorhein;rheicacid;RHUBARB EXTRACT;RHUBARB YELLOW;RHEIN CAS: 478-43-3 MF: C15H8O6 MW: 284.22 EINECS: 207-521-4 Product Categories: Anthraquinones, Hydroquinones and Quinones;Aromatics Compounds;Improve Organism Immunity;The group of Polydatin;Aromatics;Heterocycles;Intermediates & Fine Chemicals;Pharmaceuticals;Isotope Labeled Compounds mp :≥300 °C(lit.) storage temp. :2-8°C Water Solubility <0.1 g/100 mL at 17 ºC Chemical Properties :Yellowish Brown Solid Usage :Found in the free state and as glucoside in Rheum spp, Polygonaceae (rhubarb) and in Senna leaves. A potential antioxidant resource: endophytic fungi from medicinal plants. General Description Yellow needles (from methanol) or yellow-brown powder. Air & Water Reactions :Insoluble in water. Reactivity Profile :Rhein forms a red potassium salt and a pink sodium salt. Fire Hazard: Flash point data for Rhein are not available; however, Rhein is probably combustible.
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