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1, English name: Rhubarb Extract - Chrysophanol/Emodin 98%

2, Chemical name: 9, 10-Anthracenedione, 1, 8-dihydroxy-3-methyl

      Mmolecular formula: C₁₅H₁₀O₄

      Molecular weight: 254.23

     CAS No.: CAS No:481-74-3

3, Herb Sourse: Rheum palmatum L.

4, Appearance: Orange slice

5, Specifications: 98%  by HPLC

6,Physical properties

six square or slanted shaped crystalline (ethanol or benzene), melting point is 196 °, sublimation. Almost insoluble in water and slightly soluble in cold alcohol, easily soluble in boiling ethanol, soluble in benzene, chloroform, ether, acetone, glacial acetic acid and very slightly soluble in petroleum ether. , Melting point is 198 °. IRνKBrmac cm -1:1680,1630,1607;UVλMeOHmac,nm(logε):224(4.73),257(4.48),277(4.18),287(4.18),429(4.14);MS m/e(%):254(100).

-7,Pharmacological action

with more obvious effects of treating cough. Against Streptococcus, pneumococcal, influenza strains and Neoformans ,and it has varying degrees  restraint. It can promote the gut of the animal, and can cause neural excitation and muscle paralysis. Oral or subcutaneous injection, has significantly reduced the role of blood clotting time.

-8, Uses:  be used for antibactering.