Glycol Ethers, High-Purity Solvents

Propylene Glycol N-Propyl Ether (PNP)

Name: Propylene Glycol N-Propyl Ether (PNP) - Vortex
SKU: 3125ebbb87c8

Propylene Glycol n-Propyl Ether (PNP), chemically identified as 1-propoxy-2-propanol (CAS No. 1569-01-3), is a fast-evaporating, high-performance P-series glycol ether. It serves as a versatile solvent characterized by its colorless liquid form and mild, ether-like odor. PNP is engineered to balance hydrophobic and hydrophilic properties, making it an exceptional coupling agent and solvent for both water-reducible and solvent-based systems. Unlike ethylene-based (E-series) glycol ethers, PNP offers a superior safety profile with lower systemic toxicity, making it a preferred choice in environmentally conscious formulations. Its chemical structure—comprising an ether linkage and a hydroxyl group—allows it to dissolve a wide range of resins, including acrylics, epoxies, alkyds, and polyesters. As a professional-grade industrial solvent, PNP is valued for its ability to reduce surface tension and improve flow and leveling in coating applications, while maintaining a moderate evaporation rate that ensures optimal film formation.

Attributes

Key Features and Benefits

Superior Solvency: Exhibits high solvency power for various resins, oils, and greases, facilitating the formulation of concentrated cleaners and high-solids coatings.
Excellent Coupling Ability: Acts as an effective intermediate, enabling the blending of water-insoluble organic components into aqueous systems.
Surface Tension Reduction: Significantly lowers the surface tension of water-based formulations, enhancing substrate wetting and adhesion.
Safety Profile: Offers lower toxicity and fewer regulatory restrictions compared to ethylene glycol propyl ethers (EP).
Controlled Evaporation: Provides a moderate evaporation rate that prevents “flash dry” issues while ensuring timely curing and drying of films.
Full Compatibility: Miscible with most organic solvents and partially soluble in water.

Specifications

Technical Highlights

Chemical Formula: C₆H₁₄O₂ (or CH₃CH(OH)CH₂OCH₂CH₂CH₃)
Molecular Weight: 118.17 g/mol
Boiling Point: 149.8°C (301.6°F) at 760 mmHg.
Flash Point: 48°C (118.4°F) – Classified as a flammable liquid; requires grounded storage and handling.
Vapor Pressure: 1.7 mmHg at 20°C, indicating moderate volatility.
Specific Gravity: 0.880–0.890 at 20°C.
Water Solubility: 15% by weight at 25°C, providing a unique balance for oil-in-water emulsions.
Viscosity: 2.3 cP at 25°C, ensuring low-viscosity contributions to finished products.
Refractive Index: 1.413 at 20°C.