Rhein
[Herb source]: Rheum palmatum L,rhe root
[Molecular Formula]: C15H8O6; [Molecular Weight]: 284.21
CAS NO: 478-43-3
[Physics Properties]:Yellow needle cystal,melting point 321-322 OC,decompose on 330 OC.hardly soluble in the water,soluble in the alkali etc,slightly soluble in the ethanol,benzene,chloroform,aether etc.
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