Propylene Glycol n-Butyl Ether (PnB)

Basic Information

CAS No.	10215-33-5
EC No.	Not available
Linear Formula	C7H16O2
Molecular Weight	132.20
Appearance	Colorless transparent liquid
Melting Point (°C)	-100 (lit.)
Boiling point (°C)	170.1 (lit.)
Density (g/mL at 20–25 °C)	0.884 (lit.)
Solubility	Slightly soluble in water (6.4% at 20 °C); soluble in common organic solvents such as ethanol, ether and toluene
Storage Conditions	Store in a tightly closed container in a cool, dry place away from light and incompatible materials
Chemical Structure

Key Applications

• Organic synthesis intermediate: Propylene Glycol n-Butyl Ether (PnB) serves as a versatile building block for the preparation of functionalized ethers and alcohol derivatives via hydroxyl-group transformations. It is widely used in Alkoxy Propanols and Propylene Glycol Ethers for Pharmaceutical Synthesis, where controlled hydrophilic–lipophilic balance is required.

• Fine chemical intermediate: This product is employed in the manufacture of specialty fine chemicals and performance intermediates, where the butoxypropyl chain contributes defined hydrophobicity, solvency, and reactivity. Such applications are part of the Alkoxy Propanols & Glycol Ethers application category.

• Functional molecule construction: PnB enables the controlled introduction of alkoxy alcohol motifs in complex organic synthesis, supporting the design of molecules with tailored solubility and interaction properties in both pharmaceutical and specialty chemical systems.

• Laboratory research: Widely applied in laboratory-scale synthesis and methodology development, particularly in glycol ether chemistry and solvent–reactant interaction studies.

• Process development: Supports route development, process optimization, and pilot-scale production of custom intermediates, making it suitable for both R&D and industrial scale-up programs.

Propylene Glycol n-Butyl Ether (PnB) belongs to the Alkoxy Propanols & Glycol Ethers application category and is part of our broader portfolio of Ethers for Pharmaceutical Intermediates & Specialty Synthesis, covering ether-based intermediates for API synthesis, fine chemicals, and specialty industrial applications.

• Stable global supply: Established logistics channels provide dependable availability across laboratory, pilot, and commercial quantities for international customers.

• SDS and COA support: Standard SDS and COA documentation is supplied upon request to streamline regulatory compliance and quality review processes.

• Packaging and technical service: Flexible options including 25L/200L HDPE drum are available together with responsive technical assistance for specific application needs.