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What is tea tree oil extracted from?
Release time:
2025-12-09
Tea tree oil is not obtained through a simple “pressing” process; rather, it’s a natural plant essential oil extracted via distillation from the leaves of the tea tree (Melaleuca alternifolia). The core principle behind this process involves using steam to carry volatile aromatic compounds from the tea tree leaves, which are then condensed and collected to form liquid essential oil. This method is a traditional distillation technique that effectively preserves the active compounds found in tea tree leaves, such as terpinen-4-ol and γ-terpinene.
Tea tree oil is not obtained through a simple “pressing” process; rather, it’s a natural plant essential oil extracted via distillation from the leaves of the tea tree (Melaleuca alternifolia). The core principle behind this process involves using steam to carry volatile aromatic compounds from the tea tree leaves, which are then condensed and collected to form liquid essential oil. This method is a traditional distillation technique that effectively preserves the active components found in tea tree leaves, such as terpinen-4-ol and γ-terpinene.
Detailed Explanation of the Extraction Process
Raw Material Selection: To extract tea tree oil, it is essential to use specific varieties of tea trees (such as Melaleuca alternifolia), whose leaves have a high content of volatile oils. Typically, the leaves must be processed within 24 hours after harvesting to prevent loss of active ingredients.
Distillation Equipment: Industrial-grade distillation equipment includes a distillation kettle, a condenser, and a separator. The raw materials are mixed with water at a ratio of 1:3, then heated to above 100℃ to produce steam. After the steam is cooled through a condensation tube, it forms an oil-water mixture.
Oil-water separation: The mixture is separated by centrifugation or by allowing it to settle and stratify. Due to the difference in density, the oil layer floats on top of the water. After collection, the oil is filtered to remove impurities, ultimately yielding a colorless to pale yellow, transparent liquid—tea tree oil.
Quality Control: According to the ISO 4730 standard, the industry requires that the content of terpinen-4-ol be no less than 30%, while the content of 1,8-cineole should not exceed 15%. High-quality tea tree oil must also undergo GC-MS (gas chromatography-mass spectrometry) analysis to ensure it is free from heavy metals and pesticide residues.
Application Scenarios and Technical Parameters
In the medical field, terpinen-4-ol accounts for approximately 35% to 40% of tea tree oil and can inhibit bacteria such as Staphylococcus aureus and Escherichia coli. It is commonly used in the formulation of disinfectant sprays and wound-care gels.
Cosmetics Industry: Products must comply with the "Technical Specifications for Cosmetic Safety." The typical addition level does not exceed 5%. These products offer high flexibility in terms of botanical fragrance profiles and can be blended with essential oils such as lavender oil and eucalyptus oil to create customized fragrances.
Food additives: Must comply with GB 2760 standards and are permitted for use as flavoring agents, such as natural flavors used in candies and beverages.
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