Cornmint oil

Cornmint oil, Japanese mint oil is produced by steamdistillation of the flowering herb Mentha arvensis var. piperascens Malinv. The crude oil contains up to 80% ()-menthol, which can be isolated by crystallization at low temperature. The residual dementholized oil is a colorless to yellow liquid with a characteristic minty odor. Dementholized oil (“DMO”) still contains about 33–45% ()-menthol; ()-menthone and (+)-isomenthone (25–40% together) are other major components.