Where can you buy diethylene glycol monobutyl ether?

Diethylene glycol monobutyl ether can be purchased from various chemical supply companies, such as Sigma-Aldrich, Fisher Scientific, and Carolina Biological Supply. It is also available through online marketplaces like Amazon or specialty chemical distributors. When buying, ensure that you are sourcing from reputable suppliers to guarantee product quality and safety. Always check local regulations regarding the purchase and use of chemicals.