I.Product overview
(1) Name: Bohenao
(2) English name: 1-MENTHOL/DL-Menthol(CAS:89-78-1)
(3) Alias: menthol, mint ice
(4) Basic principle: This product is a saturated cyclic alcohol obtained from the fresh stems and leaves of Mentha haplocalyx Briq by steam distillation, freezing and recrystallization, which is 1-1 methyl- 4-isopropylcyclohexanol-3.
(5) Molecular formula of main component: C10H20O
(6) Molecular weight: 156.27
(7) Properties: This product is colorless acicular or prismatic crystal or white crystalline powder: it has the special aroma of mint, and the taste is hot at first and then cool. Ethanol solution showed neutral reaction. This product is easily soluble in ethanol, chloroform and ether, and slightly soluble in water.
II.Product quality specifications, technical standards: packaging, storage, value use
(1) Quality specifications, technical standards
(a) Melting point 42~44°C
(b) Specific curl -490~ -500
(c) Identification 1. After adding sulfuric acid, it becomes orange-red, and after 24 hours,a colorless oil layer without menthol aroma is precipitated.
2.Add glacial acetic acid to dissolve, add sulfuric acid and nitric acid cold mixture,only pale yellow.
(d) Related substances The peak area of each impurity is not greater than the main peak area of the reference solution (1.0%)
(e) Non-volatile matter Not pass (0.05%)
(f) Heavy metals and harmful elements lead shall not exceed 5mg/kg; cadmium shall not exceed 0.3mg/kg;
arsenic shall not exceed 2mg/kg;Mercury must not exceed 0.2mg/kg and copper must not exceed 20mg/kg.
(g) Menthol content 95.0%~105.0%
(2) Packaging, storage
Packed in cardboard drum or full paper drum, net weight 25KG per drum, and the drum is sealed.
Sealed, keep in a cool place.
(3) Value and Use
As an aromatic medicine, flavoring medicine and wind-dispelling medicine, it can be used on the skin or mucous membranes to produce a cooling sensation to relieve discomfort and pain. It is used as a stimulating drug in medicine, and its function is mainly to stimulate the skin and mucous membranes. It can relieve itching, inflammation and pain, and at the same time, it has a cool feeling locally; it is clinically used for pain, inflammation and swelling. Oral administration can be used as a carminative to treat headaches, rhinitis, pharyngitis and laryngitis, etc.
III. Production principle
Menthol powder is baked and thawed, and combined with mint crude oil, mint crude oil, ice oil, and baked oil to carry out heating and dehydration, batching, centrifugation, crystallization, drying, and air-drying processes , a saturated cyclic alcohol obtained as 1-1 methyl-4-isopropylcyclohexanol-3.
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