Overview
Solvent-grade terpineol is a monoterpenoid alcohol derived from pine oil or synthesized from α-pinene. It is valued industrially for its dual role as a solvent and fragrance. Its chemical stability and compatibility with resins make it a preferred choice in coatings and adhesive formulations. In B2B markets, terpineol is typically supplied in drums or IBC totes (200–1000 kg). Buyers should prioritize suppliers with transparent sourcing, as synthetic and natural-derived grades may differ in trace impurities affecting end-use performance.
Physical and Chemical Properties
Terpineol exists as four isomers, with α-terpineol being the most common. Its viscosity and mild polarity enable it to dissolve cellulose esters and natural resins like rosin. The boiling point (214–218°C) suits high-temperature applications, while its low water solubility limits use in aqueous systems. Key stability concerns include oxidation upon prolonged air exposure, which may form peroxides. Inhibitors like BHT are sometimes added to commercial grades. Density (0.93 g/cm³) is lower than water, requiring careful separation in waste treatment.
Main Applications
In paints/coatings, terpineol acts as a coalescing agent for latex films and a flow improver for alkyd resins. The printing ink industry uses it to adjust drying rates and enhance pigment dispersion. Its antimicrobial properties also make it a component in disinfectant formulations. Emerging uses include cannabis extraction (terpene fraction enhancement) and electronic cigarette flavorings. However, regulatory scrutiny varies by region—buyers must ensure compliance with local chemical inventories (e.g., TSCA, EINECS).
Safety and Storage
Classified as a Category 2 skin irritant under GHS, terpineol requires PPE during handling. Ventilation is critical to avoid vapor accumulation (flash point: 90°C). Spills should be contained with absorbents like vermiculite, not washed into waterways due to aquatic toxicity. Storage life is typically 2 years in nitrogen-sparged containers. Test for peroxide formation if stored beyond 6 months. Compatibility checks are necessary with aluminum and certain plastics (e.g., PVC may soften).
B2B Procurement Guide
For industrial buyers, key specifications include isomer ratio (α-terpineol ≥95%), moisture content (<0.1%), and residual solvent levels (e.g., limonene <1%). Batch certificates of analysis (CoA) are essential. Spot purchases commonly range from $8–12/kg, while contracts ≥5 MT may secure 10–15% discounts. Sea freight is cost-effective for international shipments, but ensure 40°C maximum transit temperature to prevent degradation.
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