PROPYLENE GLYCOL N-BUTYL ETHER

Propylene Glycol n-Butyl Ether is a colorless, slow-evaporating, hydrophobic solvent widely used as a coupling agent and coalescent in water-based coatings, inks, and industrial cleaning formulations. 
Propylene Glycol n-Butyl Ether offers strong solvency for resins, oils, and grease, with a mild odor, high flash point (63°C), and low toxicity.
Propylene Glycol n-Butyl Ether is a versatile glycol ether solvent widely used in coatings, cleaning formulations, inks, and industrial chemical processes.

CAS:    10215-33-5
MF:    C7H16O2
MW:    132.2

Synonyms
Propylene glycol n-butyl ether;Propylene Glycol Mono-N-Butyl Ether;n-butoxy-1-propanol;Propylene glycol mono-n-butyl ether: (3-butoxy-1-propanol);1-Propanol, 3-butoxy-;Brn 1734195;Dowanol 37b;Nsc 221254

Propylene Glycol n-Butyl Ether Chemical Properties
Melting point: -100℃
Boiling point: 170.1℃
density: 0.8843
refractive index: 1.4174
Fp: 68℃
pka: 14.89±0.10(Predicted)
EPA Substance Registry System: Propylene Glycol n-Butyl Ether (10215-33-5)

Industrial uses    
The longer C4 alkyl carbon chain in Propylene Glycol n-Butyl Ether affords more organic solvency as compared to the shorter methyl side chain group found in dipropylene glycol methyl ether (DPM). 
TPropylene Glycol n-Butyl Ether solvent is a better choice for a coalescent solvent than the DPM since the DPM solvent is completely water soluble. 
Complete water solubility limits the all important organic solubility necessary for good latex film formation.