Items | Specifications | Results |
Appearance | Colorless or slightly yellowish clear liquid, special cool and refreshing aroma | Complies |
Density（20℃/20℃） | 0.888-0.908 | 0.890 |
Optical Rotation（20℃） | -24°-- -17° | -18.4° |
Refractive Index（20℃） | 1.456—1.466 | 1.4582 |
Acid value | ≤1.5 | 0.8 |
menthol Content | 28.0%--40% | 37.2% |
Solubility（20℃） | Add 1 volume sample to 4 volume of ethanol 70%(v/v), obtaining a settled solution. | Confirmed |
Conclusion | The test results conform to National Standard specifications. |
Mentha arvensis oil, commonly known as Cornmint Oil or Japanese Mint Oil, is an essential steam-distilled from the flowering plant Mentha arvensis, a species of mint native to Europe and Asia but cultivated extensively in regions like China, India, and Brazil.
The most defining characteristic of Mentha arvensis oil is its exceptionally high concentration of menthol, typically ranging from 70% to 90%. This makes it the world's most significant natural source for menthol crystals. The oil itself has a strong, sharp, penetrating, and distinctly cooling aroma, which is more herbaceous and less sweet than its well-known relative, peppermint oil (Mentha × piperita).
Its primary applications are driven by its potent menthol content:
Source of Natural Menthol: The majority of Mentha arvensis oil is fractionally frozen or distilled to isolate pure, natural L-menthol crystals. These crystals are a vital commodity in the pharmaceutical, flavor, and fragrance industries.
Flavoring Agent: The oil, or its derivatives, is widely used to impart a strong cooling sensation in products like toothpaste, mouthwash, chewing gum, breath mints, and confectionery. It provides the characteristic "minty" flavor at a lower cost than peppermint oil.
Fragrance and Aromatherapy: While its sharp aroma limits its use in fine perfumery, it is common in household products like inhalers, diffusers, and cleaning agents for its refreshing and decongestant properties. In aromatherapy, it is valued for its invigorating and clarifying effects.
Topical Analgesic and Cosmetics: The cooling sensation of menthol provides a soothing, counter-irritant effect. This makes cornmint oil a key ingredient in muscle rubs, balms, liniments, and creams designed to relieve minor aches and pains. It is also found in cosmetics like lip balms for its refreshing feel.
A crucial point of comparison is with Peppermint Oil. While both are cooling, peppermint oil has a more balanced composition, containing significant amounts of menthone in addition to menthol, resulting in a more complex and sweeter aroma. Mentha arvensis oil is generally more pungent and less expensive, making it an economical choice for industrial applications where the pure cooling power of menthol is the primary goal.
As with all essential oils, it should be used with care. It is highly concentrated and can cause skin or mucous membrane irritation if not properly diluted. It is for external use only.
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