Glycol Ethers, High-Purity Solvents

DiPropylene Glycol N-propyl Ether (DPNP)

Name: DiPropylene Glycol N-propyl Ether (DPNP) - Vortex
SKU: 3821681dc13d

Dipropylene Glycol n-Propyl Ether (DPnP), identified by CAS number 29911-27-1, is a high-performance, slow-evaporating P-series glycol ether. Chemically, it consists of a mixture of isomers, primarily 1-(2-propoxy-1-methylethoxy)propan-2-ol. This colorless liquid is characterized by its dual functionality—containing both ether and hydroxyl groups—which provides a unique balance of hydrophilic and lipophilic properties.

DPnP is highly regarded in the chemical industry as a versatile “bridge” solvent, capable of coupling organic resins with aqueous phases. Its slow evaporation rate makes it an exceptional coalescent for water-borne coatings, ensuring proper film formation and structural integrity. Unlike E-series glycol ethers, DPnP offers a more favorable toxicological profile and lower volatility, aligning with modern environmental and safety regulations. It possesses a mild, non-intrusive odor and a high flash point, making it a preferred choice for heavy-duty cleaners and industrial coatings where safety and performance are paramount.

Attributes

Key Features and Benefits

Superior Coalescing Efficiency: Effectively lowers the Minimum Film Forming Temperature (MFFT) in latex systems, ensuring smooth, durable finishes.
Excellent Solvency: Acts as a powerful solvent for a wide range of resins, including acrylic, epoxy, alkyd, and nitrocellulose.
Low Volatility: Its slow evaporation rate prevents premature drying, improving “open time” and leveling in architectural coatings.
Surface Tension Reduction: Significantly reduces the surface tension of water-based formulations, enhancing wetting and penetration on various substrates.
Enhanced Safety Profile: Features low acute toxicity and a high flash point (94^circC), reducing fire hazards during storage and handling compared to faster-evaporating solvents.
High Chemical Stability: Remains stable under a wide range of pH conditions, making it suitable for both acidic and alkaline cleaning formulations.

Specifications

Technical Highlights

Molecular Formula: C₉H₂₀O₃
Molecular Weight: 176.25 g/mol
Boiling Point: 212^circC (414^circF) at 760 mmHg.
Evaporation Rate: 0.02 (n-Butyl Acetate = 1), classifying it as a very slow-evaporating solvent.
Vapor Pressure: 0.08 mmHg at 20^circC, contributing to low VOC emissions in specific regulatory contexts.
Solubility: Partially soluble in water (15 g/100g at 25^circC); however, it exhibits complete miscibility with most organic solvents.
Specific Gravity: 0.916 at 20^circC.
Viscosity: 4.9 cP at 25^circC, providing low-viscosity thinning capabilities for resin concentrates.