Overview
Lemon oil extracted from dried tangerine peel (Chenpi) is a natural essential oil derived through steam distillation or cold pressing of aged Citrus reticulata peels. Traditionally used in Chinese medicine, it has gained industrial importance for its high limonene content (70-90%) and citrus fragrance. The extraction preserves bioactive compounds like flavonoids and terpenes, offering both aromatic and functional benefits. Chenpi, the raw material, is specifically sun-dried tangerine peel aged for at least one year, which intensifies the oil’s aroma profile. This distinguishes it from fresh citrus peel oils, as aging reduces moisture and increases concentrated volatile compounds. The oil is prized in B2B markets for its versatility in food, cosmetics, and therapeutic applications.
Physical and Chemical Properties
The oil’s primary component, d-limonene, contributes to its solubility in organic solvents and immiscibility with water. Its low boiling point makes it volatile, requiring careful handling during extraction to preserve terpene integrity. The pale yellow color and density (~0.85 g/cm³) are typical of citrus-derived oils. Key chemical markers include γ-terpinene and myrcene, which enhance its antimicrobial and antioxidant effects. The oil’s refractive index (1.472–1.474 at 20°C) and optical rotation (+75° to +80°) are quality indicators. Unlike synthetic counterparts, Chenpi-derived oil may contain trace coumarins, adding complexity to its aroma.
Main Applications
In the food industry, it serves as a natural flavoring agent for beverages, confectionery, and baked goods, often replacing synthetic citral. Its GRAS (Generally Recognized As Safe) status by the FDA supports this use. The cosmetics sector values it for perfumes, soaps, and skincare products due to its uplifting scent and purported antibacterial properties. Aromatherapy utilizes the oil for stress relief and air purification, while industrial cleaners leverage its degreasing ability. Emerging applications include biodegradable solvents and agricultural pest repellents. B2B buyers should note regional preferences: Asian markets favor traditional medicine blends, whereas Western industries prioritize perfumery grades.
Safety and Storage
Though generally safe, undiluted oil may cause dermatitis in sensitive individuals. Proper ventilation is required during bulk handling due to volatility. Phototoxicity risks necessitate dark glass or aluminum containers for storage, ideally below 25°C. Shelf life extends to 2-3 years with optimal conditions, but oxidation can alter aroma. Suppliers often add antioxidants like vitamin E to extend stability. MSDS documentation should accompany bulk shipments, noting flash point (48°C) and incompatibility with strong oxidizers.
B2B Procurement Guide
Buyers should prioritize suppliers providing GC-MS analysis to verify limonene concentration (≥85% for premium grades) and residual solvent reports. Organic certification (e.g., USDA, EU Ecocert) ensures no pesticide contamination. Steam-distilled oil commands higher prices than cold-pressed due to purity. Bulk pricing tiers typically start at 25kg drums, with discounts for 200kg+ orders. Sample evaluation should assess aroma profile, color consistency, and solubility. Contract terms may include seasonal availability clauses, as Chenpi quality varies by harvest year. Preferred suppliers are often located in Guangdong or Zhejiang, China, where traditional drying expertise exists.
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