Menthol

[ ] B He N Pinyin name which gave o
English name [ Menthol ]
[ alias ] mint ice
[ source ]
Source: for medicinal Labiatae plants Mint Herb Extract crystallization.
Latin animal mineral name: Mentha canadaensis L.
[ ] the original morphology of perennial aromatic herbs, erect stems, high 30-80cm. With creeping rhizomes, into the soil to 13cm, brittle, easily broken. Stem Rui four prismatic, much branched, glabrous or slightly four side inverted, pilose, corner and near the section of hair is significant. Leaves opposite; petiole length 2-15mm; leaf shape change is bigger, lanceolate, ovate-lanceolate, oblong-lanceolate to elliptic, long 2-7cm, 1-3cm wide, apex acute or acuminate, base cuneate to subrounded, long level above a basal sparsely thick tooth serrate, lateral veins on the above 5-6, dark green, pale green below, two pilose and yellow glandular scale, with the following distribution density. Verticillaster inflorescence axillary, contour spherical, flower diameter of about 18mm, more to stem top, internodes, leaves and inflorescences are recursive gradient is small; the total peduncle with bracteoles several, linear lanceolate, long in the following 2mm, ciliate; pedicel slender, long 2.5mm, slightly pubescent or nearly glabrous; calyx tubular bell, long 2-3mm, outside pilose and glandular protactinium, with 10 veins, calyx teeth 5, a triangular shaped subulate, ca. 0.7mm, margin ciliate; corolla mauve to white, limb 4 lobed, lobes apex 2 crack, the larger the remaining 3 pieces, nearly equal, corolla throat inside by micro pilose; stamens 4, anterior to the long, often extend corollaceous outside or pack in corolla tube, filaments filiform, glabrous, anthers ovoid, 2 rooms, anther locules parallel; styles slightly beyond stamens, apex subequally 2 lobed, lobes subulate. Small is the fruit of long ovoid, length 0.9mm, width 0.6mm, tan or light brown, with small nest. Flowering of 7-9 months, fr. 10-11.
[ character ] trait identification of colorless acicular or prismatic crystal or white crystalline powder; a mint special for gas, taste after the beginning of hot cool; ethanol solution is neutral. The latch ethanol, chloroform, ether, liquid paraffin or volatile oil is easily dissolved in water, very slightly soluble. The melting point of 42-44 C. Precision that will take this product, add ethanol made from 1ml each containing 0.1g solution, according to the determination of the specific rotation, - 49 degrees C to - 50 DEG c..
[ identify ] physicochemical identification ( 1) take this product 1g, plus 20ml sulfate dissolved, significant orange red, 24h precipitation without menthol fragrance colorless oil.
[ ] taste acrid in taste and cold;
[ ] Shufeng Qingre functions. The main common cold of wind-heat; headache; red eye; sore throat; tooth pain; skin pruritus
[ usage] oral administration: 0.02-0.1g, multiple input tablet containing clothes. External: spiritus, ointment, coated by.
[ ] tablet formulations, spirits, ointment.
[ ] with the clinical application of mint oil.
Excerpts from" Chinese Materia Medica" [ ]
http://chinese-herbal-medicines-directory.blogspot.com/