Mono Propylene Glycol Mono Butyl Ether (PnB), also known as Propylene Glycol n-Butyl Ether, is a clear, colorless liquid with a mild odor. It belongs to the family of glycol ethers and is valued for its excellent solvency, low toxicity, and moderate evaporation rate. This compound is widely used as a solvent in industrial and commercial applications, including cleaning products, paints, coatings, inks, and adhesives. It is particularly effective in formulations that require good coupling ability between water and hydrophobic substances. Due to its relatively low volatility and favorable environmental profile, it is often chosen as a safer alternative to more hazardous solvents.