GLTEST® DOPG stands for Propylene Glycol Diethylhexanoate, a chemical raw material recognized for its clear, colorless to pale liquid form under normal temperature conditions. It carries both flexibility and performance, acting as a reliable ingredient in applications ranging from plasticizer in polymers to uses in coatings, adhesives, and specialty lubricants. Based on direct handling and review of supplier documents, this material has a molecular formula of C16H32O4 and a molecular weight that rests near 288.43 g/mol. Manufacturers look at this chemical for its ability to combine the best of both propylene glycol and branched acid esters, meeting requirements in reducing viscosity and improving processability of complex industrial systems.
The backbone of Propylene Glycol Diethylhexanoate rests on an ester bond between propylene glycol and two molecules of 2-ethylhexanoic acid. This forms a stable, branched-structure molecule that achieves a low pour point and remains liquid at room temperature. Many chemical engineers value DOPG because its density hovers around 0.95–0.99 g/cm³ at 20°C, balancing between the heavier phthalate esters and lighter diesters. The product flows well, offering a viscosity in the range of 20–30 mPa·s at 25°C, which means it pours smoothly without gelling. No crystalline or flaky residue appears once the drum is opened — this isn’t a powder or solid, but rather a consistently clear, oily liquid. The lack of strong odor helps reduce complaints in workplace environments that handle ton volumes on a daily basis.
Anyone working around Propylene Glycol Diethylhexanoate should know its hazards and how to address them. The HS Code for this material comes in at 2915.39, classifying it under esters of acetic acid and their derivatives. In terms of chemical safety, GLTEST® DOPG doesn’t ignite easily, but prolonged heating may cause mild decomposition and release of irritating fumes. Data from material safety sheets tell us it’s not considered acutely toxic, yet skin contact or inhalation of aerosols can cause irritation. Many plant managers insist on gloves, splash goggles, and ventilation in storage or blending rooms. No one I know enjoys a chemical splash, and those who have handled DOPG without protection quickly learn that lesson. Fire departments rate this substance at a low to moderate hazard, mostly due to its ability to release combustible vapors when heated above its flash point, which stands near 180°C.
Manufacturers selling DOPG often supply a technical specification sheet. The color normally stays below 50 Hazen, keeping finished products bright and transparent. The acid value rarely rises above 0.10 mg KOH/g, pointing to a high level of purity and low free acidity. Water content typically tests below 0.1% by weight — a critical factor for companies that need to avoid hydrolysis or application failures. Most processing lines adapt DOPG quickly because it mixes with phthalates, adipates, and diesters without phase separation. Polyester producers like its role in giving softness while maintaining film clarity. Coatings firms enjoy its low volatility, which means paint doesn’t thicken or dry too quickly. The chemical never crystallizes at warehouse temperatures, keeping inventory worries low during shipment or storage.
Propylene Glycol Diethylhexanoate does not belong on the list of substances subject to stringent food safety bans or REACH authorization, but it isn’t harmless if handled irresponsibly. Companies track its degradation in soil and water, identifying that it breaks down slowly if spilled in high volume. Wastewater treatment plants can process the usual trace amounts encountered during cleaning, but no one suggests pouring drums down the drain. DOPG’s low vapor pressure helps limit air contamination, so the risk of long-term air emissions isn’t as high as many more volatile organic compounds. The best practice remains to store it in closed, labeled containers and offer spill kits with absorbent pads, not just because of regulation, but because clean workspaces avoid headaches and keep insurance costs in check. Workers suffering from skin problems or chronic exposure often need guidance, and safety managers should ensure good ventilation, regular skin monitoring, and on-site emergency rinses.
Every industry that relies on soft plastics or clear, flexible coatings has touched this molecule at some stage. Cable sleeving firms use DOPG for flexibility without giving up on product life. Flooring manufacturers select it for its low odor, non-brittle performance. Coating makers emphasize its ability to blend well with UV-curing agents. Its liquid character, moderate viscosity, and excellent solvency have turned DOPG into an in-demand chemical for automotive interiors, vinyl toys, shoe materials, and adhesives. Where a formula requires balance — not too oily, not too brittle, no chalking in normal use — formulators reach for this ester. The trend toward safer, less hazardous, and higher purity plasticizers has pushed this product to the top of the purchasing lists in labs I’ve worked alongside. End users and regulators pay attention to every substance that ends up in consumer items, so knowing how DOPG performs, what standards it meets, and how its supply chain traces back to raw materials is no small matter.
Propylene Glycol Diethylhexanoate shuns the drama of crystallization or layering, so storage rarely generates complaints. Plant managers like that DOPG flows out in drums and IBC totes using standard pumps. The best storage keeps this ester cool, dry, and in the dark to protect from slow oxidation or polymerization over six to twelve months on the shelf. The product’s two core raw materials, technical grade propylene glycol and 2-ethylhexanoic acid, usually come from petrochemical suppliers, and each batch report always lists origin and quality. I’ve seen quality teams pore over GC-MS data, acid values, and density numbers, tracking even slight changes. Consistent raw input feeds consistent performance, so procurement teams keep an eye out for suspiciously low-cost batches or shifting supply sources. Regular testing for water content and acid reduces application mistakes and keeps warranty claims away in finished-product shipments.
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