5,7-Dihydroxy-3',4',5'-trimethoxyflavone is a natural product from Centaurea scoparia.

18103-42-9

C18H16O7

344.32

(< 1 mg/ml refers to the product slightly soluble or insoluble )
Powder: -20°C for 3 years
In solvent: -80°C for 2 years