DEFINITION

Rhodiola crenulata Root and Rhizome Powder consists of the dried roots and rhizomes of Rhodiola crenulata (Hook.f. & Thomson) H.Ohba (alt. name Sedum crenulatum Hook.f. & Thomson) (Fam. Crassulaceae), collected after the scape withers in autumn, reduced to a fine or very fine powder. It contains NLT 1.0% of total phenylethanoids calculated as the sum of salidroside (C₁₄H₂₀O₇) and tyrosol (C₈H₁₀O₂) on the dried basis, and NLT 0.6% of salidroside on the dried basis.