Overview
Isononanol (INA) is a branched-chain C9 alcohol produced via hydroformylation of octenes. As a key chemical intermediate, it accounts for approximately 30% of global plasticizer alcohol production. The compound's molecular structure - featuring a tertiary carbon atom - gives it unique physicochemical properties compared to linear alcohols. Industrial production primarily serves the manufacture of diisononyl phthalate (DINP), which dominates the European plasticizer market. Major manufacturers include BASF, ExxonMobil, and Evonik, with global capacity exceeding 2 million metric tons annually. Recent market trends show growing demand for non-phthalate plasticizers, influencing INA consumption patterns.
Physical and Chemical Properties
Isononanol exhibits low viscosity (approximately 9 mPa·s at 20°C) and a characteristic mild alcohol odor. Its branched structure results in lower freezing points (-70°C) compared to linear isomers, making it suitable for cold-climate applications. The hydroxyl group enables esterification reactions, while the hydrocarbon chain provides hydrophobic properties. Key stability metrics include flash point (82°C) and autoignition temperature (310°C). The compound shows excellent resistance to hydrolysis and thermal degradation, maintaining stability up to 200°C. These properties make it preferable to octanol in high-temperature processing applications.
Main Applications
Approximately 75% of isononanol production converts to DINP plasticizers for PVC products like cables, flooring, and automotive parts. In lubricant formulations (15% of demand), it serves as a synthetic ester base stock, improving low-temperature fluidity and oxidation stability. The remaining 10% goes into surfactants, particularly for industrial cleaners and agrochemical emulsifiers. Emerging applications include: 1) Non-phthalate plasticizers like DINCH for medical devices, 2) Bio-based variants for sustainable coatings, and 3) High-performance hydraulic fluids. The Asia-Pacific region dominates consumption, driven by China's plastics and automotive industries.
Safety and Storage
Classified as flammable liquid (Category 3) under GHS, isononanol requires storage in UN-approved containers with nitrogen blanketing for large volumes. Secondary containment should accommodate 110% of tank capacity. Workplace exposure limits typically follow 50 ppm (8-hour TWA) with local exhaust ventilation recommended. Spill response involves absorbing with inert material (vermiculite, sand) and preventing entry into waterways. Firefighting requires alcohol-resistant foam, not water jets. Decomposition products may include carbon monoxide and aldehydes above 250°C. Regular monitoring for peroxides is advised in long-term storage.
B2B Procurement Guide
Industrial buyers should specify technical grade (≥99% purity) with maximum 0.1% water content. Key quality indicators include hydroxyl value (380-395 mg KOH/g) and APHA color (<15). Bulk shipments typically use ISO tank containers (20-24 MT) or carbon steel drums (200kg). For sustainable sourcing, inquire about: 1) C8/C10 content (affects plasticizer performance), 2) Renewable carbon index (for bio-based versions), and 3) REACH compliance documentation. Long-term contracts often provide 5-8% cost advantages over spot purchases. Third-party lab testing is recommended for import transactions.
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