Preparation method:
It is obtained by steam distillation of fresh young branches and flowering annual buds and flowers of rosemary, a perennial shrub of Labiatae. The yield was 2% (leaves) ~ 1.4% (flowers).
Quality standard:
This product is colorless or light yellow volatile essential oil, with the unique green grass like cool aroma and sweet camphor smell of rosemary.
Relative density: 0.893 ~ 0.910
Optical rotation: - 5 ° ~ + 10 °
Heavy metal test (GT-16-5): negative
Borneol content: ≥ 8.0%
Solubility in alcohol (OT-43): 1ml is soluble in 1ml of 90% ethanol, and turbidity may appear if it is continuously diluted
Packaging and storage:
25kg / barrel, 50kg / barrel, 180kg / barrel, sealed and stored in a dark, cool and dry place.