A perennial herb, 60 cm high. Leaves simple, opposite, short stalked, oblong, 2.5-5 cm long, obtusely or acutely serrated. Flowers small, lilac in axillary whorls. Fruits nutlets, smooth.
Flowering and fruiting: June-August
Parts used: Leaves
Distribution: Cultivated throughout plain area of Nepal.
Method of Extraction: Steam Distillation
|Specification of Mentha Arvensis|
|1. Organoleptic Properties|
|Appearance||Slightly thick liquid.|
|Aroma||Strong, fresh and somewhat bitter-sweet.|
|2. Physico-chemical Properties|
|Specific gravity||0.8940 to 0.9015 at 25° C|
|Optical rotation||(-) 15.5 to (-) 45 at 25C|
|Refractive index||1.4590 to 1.4750 at 25° C|
|Acid number||0.3 to 5|
|Ester number||3 to 15|
|Ester number after acetylation||210 to 255|
|Total alcohol||70 to 88 % ( Total menthol content|
|Solubility||Soluble in 1.2 to 2.5 vol. of 70% alcohol|
|3. Chemical constituent
It contains Menthol and menthone
a. Dried plant is aromatic, antispasmodic, carminative, stomachic, refrigerant, stimulant, emmenogogue and diuretic.
b. In the isolation of menthol crystals, in flavoring toothpastes, mouthwashes and pharmaceuticals
c. Medicinal & Aromatherapy use: Oil is good for the nervous system, acting as a regulator and sedative: Menthol is well known as a cardiac tonic in pharmaceutical preparations. It is a good blood cleanser. Because it is antiseptic and anti-bacterial, it can be used in swollen gums, mouthwash or mouth ulcers, toothache.