Glycol Ethers, High-Purity Solvents

Diethylene Glycol Monobutyl Ether (Glycol Ether DB)

Diethylene Glycol Monobutyl Ether (CAS: 112-34-5), commonly referred to as Glycol Ether DB or Butyl Carbitol, is a high-boiling, slow-evaporating solvent belonging to the ethylene oxide-based glycol ether family. It is a clear, colorless liquid with a faint, characteristic butyl odor. Chemically, it possesses both ether and alcohol functional groups, providing it with a dual polarity that allows it to dissolve a wide range of hydrophobic and hydrophilic substances. This amphiphilic nature makes it an exceptional coupling agent for formulations containing water and organic solvents. Glycol Ether DB is valued in the chemical industry for its high solvency power, low volatility, and excellent chemical stability. Unlike shorter-chain ethylene glycol ethers, it has a more favorable toxicological profile, though standard industrial safety protocols remain essential. Its primary utility lies in its ability to improve flow, leveling, and film formation in various coatings and cleaning applications.

Attributes

Key Features and Benefits

Superior Solvency: Effectively dissolves a broad spectrum of resins, including nitrocellulose, acrylics, epoxies, and alkyds.
Low Evaporation Rate: Enhances the “open time” of coatings, preventing premature drying and ensuring a smooth, high-quality finish.
High Coupling Efficiency: Acts as an intermediary to stabilize immiscible ingredients in aqueous and solvent-based systems.
High Flash Point: With a flash point exceeding 100°C, it is classified as a non-flammable liquid under many regulatory frameworks, facilitating safer storage and transport.
Water Miscibility: Completely soluble in water, making it ideal for water-borne industrial and architectural formulations.
Low Odor: Provides a more comfortable working environment compared to aggressive, high-volatility solvents.

Specifications

Technical Highlights

Chemical Formula: C₈H₁₈O₃ / CH₃(CH₂)₃OCH₂CH₂OCH₂CH₂OH.
Molecular Weight: 162.23 g/mol.
Boiling Point: 230.4°C (446.7°F) at 760 mmHg, indicating very low volatility.
Flash Point: 101°C (214°F) via Closed Cup method.
Vapor Pressure: Extremely low at < 0.01 mmHg at 20°C, minimizing inhalation exposure risks.
Specific Gravity: Approximately 0.953 at 20°C.
Viscosity: 6.5 cP at 20°C, providing ease of handling in pumping and mixing operations.
Evaporation Rate: 0.002 (relative to n-butyl acetate = 1), making it one of the slowest evaporating glycol ethers available.