Quality Requirements 4.1 Appearance: It is a brown to brown homogeneous liquid with no obvious suspended matter and sedimentation. 4.2 Physical and chemical indicators The physical and chemical indicators should meet the requirements of Table 1. Table 1 Physical and chemical index project index pH value range 4.5-7.5 Total active ingredient juglone % ≥10 Artemisinin % ≥4.0 Total phenolic acid % ≥15.0 Total flavonoids % ≥24.9 Excipients % ≥20 Dilution stability (20 times) Qualified low temperature Stabilitya Qualified thermal storage stabilitya Qualified water-insoluble substance mass fractiona, % ≤3.0 a Water-insoluble substance mass fraction, low temperature stability and thermal storage stability are random inspection items, under normal production conditions, at least every three months Check once.