Overview
Terpinene refers to a group of isomeric monoterpenes, primarily α-terpinene and γ-terpinene, derived from pine oil or citrus sources. These compounds are valued for their aromatic properties and are extensively used in the fragrance, flavor, and pharmaceutical industries. Naturally occurring in essential oils like tea tree oil and cardamom, terpinene isomers contribute to their characteristic scents. Industrially, they are synthesized or isolated through fractional distillation of turpentine oil.
Physical and Chemical Properties
Terpinene isomers are colorless to pale yellow liquids with a fresh, citrus-like odor. They are highly flammable and sensitive to oxidation, often stabilized with antioxidants for commercial use. α-Terpinene and γ-Terpinene share the molecular formula C10H16 but differ in structure, leading to variations in boiling points and reactivity. Both are hydrophobic and mix well with oils and organic solvents, making them suitable for hydrophobic formulations.
Main Applications
In fragrances, terpinene adds citrus or herbal notes to perfumes and soaps. The food industry employs it as a flavoring agent in beverages and baked goods. Pharmaceutical applications include its use as an intermediate in synthesizing menthol and other terpenoid compounds. Its solvent properties are leveraged in industrial cleaning products and agrochemical formulations.
Safety and Storage
As flammable liquids, terpinene isomers require storage in tightly sealed containers away from heat and open flames. Proper ventilation is essential to prevent vapor accumulation. Prolonged skin contact may cause irritation, and inhalation of vapors should be avoided. Safety data sheets (SDS) must be consulted for handling protocols, including the use of gloves and goggles.
B2B Procurement Guide
Buyers should prioritize suppliers who provide certificates of analysis (CoA) detailing purity (typically 95–99%) and isomer composition. Bulk shipments often require hazardous material documentation. Pricing varies based on volume and purity. For reference, technical-grade terpinene ranges from $20–$50/kg, while pharmaceutical-grade commands higher prices. Long-term contracts may offer cost advantages.
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