Propylene Glycol Diethylhexanoate draws the attention of chemical professionals for its unique combination of physical and chemical properties. Known by its molecular formula C16H32O4, this organic compound presents itself most often as a clear, colorless liquid, though under certain conditions it may transition toward a faint yellow hue. Chemists identify its molecular weight as about 288.43 g/mol. Formula structure reveals propylene glycol tethered to two diethylhexanoate moieties. This arrangement has a real impact on how the molecule behaves, from its interactions with solvents to its viscosity, and its compatibility with a host of commercial and industrial applications.
Speaking from hands-on laboratory work, users find this molecule robust yet flexible in application. The compound’s physical properties—its density falls between 0.95 and 0.98 g/cm³ at 20°C—bring practical advantages for manufacturers designing specialty lubricants, plasticizers, and custom formulations. Its boiling point hovers around 330°C, and the flash point typically records above 180°C, marking it as a stable, non-volatile material for processing. The substance forms a true liquid at room temperature, steering clear of crystallization or precipitation under normal handling and storage.
Propylene Glycol Diethylhexanoate typically arrives in the lab or plant as a liquid, not a solid, making it easy to transfer and mix. Material scientists rarely encounter this product in flakes, solid, powder, pearls, or crystals; the compound’s molecular design doesn’t accommodate those forms under ordinary storage conditions. Measuring by liter, the substance pours cleanly and stays free of sediment, a trait that appeals to technicians wanting efficiency in batching and blending. It dissolves well in many organic solvents, speaking to its intended use in other synthesized materials and mixtures. Its low water solubility keeps it stable in both hydrophobic and hydrophilic environments, supporting compatibility in polymer manufacturing, coatings, and flavor carrier applications.
In international trade, Propylene Glycol Diethylhexanoate falls under HS Code 2915.90.0090 for organic esters and derivatives. This classification sets the parameters for customs procedures and import/export documentation. Such specificity helps businesses prevent errors in logistics and supports full traceability throughout the supply chain—a crucial task in today’s global marketplace. Regulatory authorities require accurate hazard communication, and safety data sheets reflect both its chemical stability and any noted toxicological findings.
Every technician working with raw chemicals keeps safety top-of-mind; Propylene Glycol Diethylhexanoate presents a sensible profile. The substance doesn’t classify as hazardous for bulk transportation. As with any industrial chemical, direct contact with eyes or skin causes irritation. Long-term exposure risks remain low when handled according to documented procedures: goggles, gloves, and adequate ventilation during use. Testing in controlled settings shows the substance as minimally harmful compared to more volatile organics. Yet, responsible disposal practices stay vital; the compound breaks down slowly in the environment, so collection and treatment through approved channels prevent accidental release. From an industry standpoint, user education and clear labeling always matter more than overstatement or complacency.
Synthesizing Propylene Glycol Diethylhexanoate starts with basic chemical building blocks—propylene glycol and diethylhexanoic acid—undergo esterification, typically in the presence of a strong acid catalyst. Chemical suppliers look closely at purity, color, and odor, recognizing that trace impurities affect downstream product quality. Good sourcing of raw materials shapes the ultimate purity, viscosity, and reactivity. Process optimization controls water content and neutralizes any remaining acid, which guards against unexpected shifts in pH during use or storage. Final filtration produces the homogenous liquid that arrives at blending facilities, warehouses, or research labs. Specifications document every measurable factor: appearance, water content below 0.2%, acid value, saponification value, and refractive index at 20°C.
Product formulators reach for Propylene Glycol Diethylhexanoate as an effective plasticizer in PVC and specialty polymers, boosting flexibility without excessive migration or discoloration over time. The low volatility and thermal stability make it valuable in processes pushing the limits of heat and agitation. In coatings, its unique balance of hydrophobicity and solubility supports durable films on plastics and metals. Flavor and fragrance chemists see its use as a carrier and solvent, trusting that the ester structure doesn’t easily break down or impart unwanted aroma. Its chemical profile grants reliable performance where other glycol esters fall short, owing to its bulkier diethylhexanoate side chains.
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