Overview
Dioctyl Azelate (DOZ) is a diester derived from azelaic acid and 2-ethylhexanol. It belongs to the family of non-phthalate plasticizers, gaining traction as a safer alternative in flexible PVC applications. Developed for its balanced performance in low-temperature environments, DOZ is widely adopted in automotive, wire and cable, and footwear industries. As a specialty plasticizer, DOZ is prized for its biodegradability and low toxicity compared to traditional phthalates. Its molecular structure provides both flexibility and durability, making it suitable for products requiring prolonged exposure to cold climates or mechanical stress.
Physical and Chemical Properties
DOZ exhibits a low viscosity and high flash point (≈210°C), ensuring safe processing in industrial settings. Its freezing point of -65°C allows PVC compounds to remain flexible in sub-zero temperatures, a critical feature for Arctic-grade cables and seals. The ester's hydrolytic stability prevents degradation in humid conditions. With a molecular weight of 412.65 g/mol, DOZ demonstrates low migration rates from polymer matrices, extending product lifespans. Its solubility parameters align well with PVC resins, enabling homogeneous blending without phase separation during extrusion or calendering processes.
Main Applications
Approximately 70% of DOZ production is consumed by the PVC industry, particularly in cold-resistant flooring, automotive interior trims, and medical tubing. Its compatibility with nitrile rubber makes it valuable for oil-resistant gaskets and hoses in petroleum applications. In specialty adhesives, DOZ acts as a non-volatile co-plasticizer that reduces viscosity without compromising bond strength. Emerging uses include bio-based polymer formulations and as a carrier fluid in fragrance encapsulation technologies due to its odorless characteristics.
Safety and Storage
DOZ is classified as non-hazardous under GHS standards but requires basic industrial hygiene measures. Spills should be contained with inert absorbents to prevent slippery surfaces. Long-term storage in carbon steel drums may cause slight discoloration; stainless steel or HDPE containers are preferred. Thermal decomposition above 250°C may release irritating vapors, necessitating local exhaust ventilation during high-temperature processing. The ester's low water solubility (0.001 g/L) minimizes environmental risks, but secondary containment is advised for bulk storage areas.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001 certification and REACH compliance documentation. Batch-specific certificates of analysis should confirm purity (≥99%), acid value (<0.1 mg KOH/g), and moisture content (<0.1%). For large-volume procurement (20+ metric tons), consider FOB prices from Asian manufacturers with IECEX-certified production facilities. Just-in-time delivery models are recommended due to DOZ's 12-month shelf life. Technical collaboration with suppliers can optimize plasticizer ratios for specific hardness requirements (typically Shore A 70-90).
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