Overview
2-Octanol is an eight-carbon secondary alcohol that serves multiple industrial roles. As a mid-chain alcohol, it offers balanced solvent properties between volatility and solvency power. The compound occurs naturally in some essential oils but is primarily produced synthetically for commercial use. First described chemically in the early 20th century, 2-octanol gained industrial importance as a versatile intermediate. Its molecular structure - with the hydroxyl group on the second carbon - gives it distinct properties compared to primary octanol isomers. Global production meets demand from diverse sectors including chemicals, cosmetics, and specialty manufacturing.
Physical and Chemical Properties
As a liquid at room temperature, 2-octanol displays characteristic alcohol properties with moderate hydrogen bonding capability. Its viscosity (approximately 9 cP at 20°C) and surface tension make it useful for formulations requiring flow control. The compound shows stability under normal conditions but may form peroxides upon prolonged air exposure. Chemically, 2-octanol undergoes typical secondary alcohol reactions including esterification and oxidation. Its partition coefficient (log P around 2.8) indicates moderate hydrophobicity, explaining its dual solubility characteristics. The evaporation rate (n-butyl acetate = 1) is approximately 0.01, making it a relatively slow-evaporating solvent suitable for certain coating applications.
Main Applications
In industrial applications, 2-octanol serves primarily as a solvent for natural resins, synthetic polymers, and waxes. Its ability to dissolve nitrocellulose and some alkyd resins makes it valuable in specialty coatings. The chemical industry utilizes it as an intermediate for plasticizers, surfactants, and flotation agents. The fragrance sector employs 2-octanol as a component in floral and citrus accords, valued for its mild, slightly fatty odor characteristic. Pharmaceutical applications include use as a co-solvent in topical formulations. Emerging uses include biofuel research where it serves as a model compound for studying alcohol combustion properties.
Safety and Storage
As a combustible liquid (flash point ~82°C), 2-octanol requires careful handling to prevent fire hazards. Storage tanks and containers should be grounded to prevent static discharge. While not highly toxic, prolonged skin contact may cause defatting and irritation - chemical-resistant gloves are recommended. Proper storage involves keeping containers tightly sealed in well-ventilated areas away from oxidizers. For long-term storage, nitrogen blanketing can prevent peroxide formation. Spill containment measures should include non-combustible absorbents. Regulatory classifications vary by region, but most jurisdictions require standard flammable liquid precautions.
B2B Procurement Guide
Industrial buyers should specify required purity grades (typically 98-99.5%) and packaging options (drums, totes, or bulk). Technical grade suffices for most solvent applications, while fragrance or pharmaceutical uses may require higher purity. Key quality indicators include water content (<0.1%) and acid value specifications. Supply chain considerations include regional availability - major producers operate in North America, Europe, and Asia. Buyers should verify certificates of analysis and compliance with relevant regulations (REACH, TSCA, etc.). For large-volume purchases, contract manufacturing arrangements may offer cost advantages. Sample testing is recommended when qualifying new suppliers.
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