Peppermint oil

Synonymous: Mentha arvensis oil; mentha oil; cornmint oil，partially dementholized

Preparation method:

It is obtained from the whole flowering plant (aboveground green part) of the Labiatae herb Mentha asiatica by steam distillation.

It condenses into a solid when it is slightly cold. Freezing point 5 ~ 28 ℃, acid value less than 2, soluble in nonvolatile oil, mineral oil and malonic acid, insoluble in glycerol.

Quality standard:

Appearance: colorless or light yellow clear liquid. Strong mint aroma and cool moderate bitterness. Unstable to strong acids and bases. Soluble in ethanol, most non-volatile oils, mineral oils and propylene glycol, insoluble in glycerol.

Relative density: 0.888 ~ 0.908

Refractive index: 1.4 56 ～ 1.466

Optical rotation: - 24 ° ~ - 15 °

Ester content (calculated by menthol acetate): 5.6% ~ 18.4%

Solubility: completely soluble in 2.5 ~ 3.5 parts of 70% ethanol.

Total alcohol content (calculated by menthol): more than 28-40%

Packaging and storage:

25kg / barrel, 50kg / barrel, 180kg / barrel, sealed and stored in a dark, cool and dry place.