PROPYLENE GLYCOL MONOBUTYL ETHER

Propylene Glycol Monobutyl Ether, also known as n-butyl propyl ether or PnP, is a solvent with diverse industrial applications.
Propylene Glycol Monobutyl Ether can be used in household and industrial cleaners, grease paint removers, metal cleaners, etc.
Propylene Glycol Monobutyl Ether is a colorless liquid with an ether-like odor.

CAS:    5131-66-8
MF:    C7H16O2
MW:    132.2
EINECS:    225-878-4

Synonyms
1-BUTOXY-2-PROPANOL;1,2-PROPYLENE GLYCOL 1-MONOBUTYL ETHER;PROPYLENE GLYCOL 1-MONOBUTYL ETHER;PROPYLENE GLYCOL MONOBUTYL ETHER;PROPYLENE GLYCOL NORMAL BUTYL ETHER;PNB;ARCOSOLV(R) PNB;propasolsolventb

Propylene Glycol Monobutyl Ether is a non-ionic surfactant that is used in the manufacture of plasticizers, lubricants, and detergents. 
Propylene Glycol Monobutyl Ether has been shown to have low toxicity and to be biodegradable. 
Propylene Glycol Monobutyl Ether has been shown to activate the polymerase chain reaction (PCR) by binding to DNA and RNA, which may be due to its ability to form hydrogen bonds with nitrogen atoms on the bases of these molecules. 
This can also allow Propylene Glycol Monobutyl Ether to act as an emulsifier for water-in-oil emulsions. 
Propylene Glycol Monobutyl Ether has also been shown in clinical studies to have antimicrobial properties against infectious diseases such as tuberculosis and HIV, as well as antimicrobial activity against hk-2 cells infected with Mycobacterium tuberculosis.
Propylene Glycol Monobutyl Ether has a water contend of 0.1 max (wt%) and a specific gravity @ 20 of 0.875-0.895 g/cm3. 
The distillation range is between 162 and 175ºC.

Propylene Glycol Monobutyl Ether is a clear, colorless liquid that gives off a distinctive odor. 
Propylene Glycol Monobutyl Ether has a molecular weight of 132.20100 and an exact mass of 132.20. 
Propylene Glycol Monobutyl Ether is registered with the European Chemicals Agency as 225-878-4, the International Labour Organization as 1614, and the National Science Foundation as 2211. 
In addition, Propylene Glycol Monobutyl Ether has a DSSTox ID: DTXSID8027589, customs code 29094. 
Propylene Glycol Monobutyl Ether has a polar surface area (PSA) of 29.46000 and an XLogP3 value of 1.1839. 
In appearance, Propylene Glycol Monobutyl Ether is a clear, colorless liquid with a density of 0.880 g/cm3 and a measured temperature of 20°C. 
Propylene Glycol Monobutyl Ether has a melting point below -75°C, a boiling point of 171.5°C, and a flash point of 54.5°C. 
Propylene Glycol Monobutyl Ether's refractive index is n20/D 1.416(lit.), and its solubility in water is 6 g/100ml, which is a medium solubility. 
Propylene Glycol Monobutyl Ether is recommended to store it in a cool, ventilated and dry place and avoid long-term storage to prevent the formation of peroxide. 
Propylene Glycol Monobutyl Ether has a vapor pressure of 0.187kPa at 25°C and a vapor density of 4.55 (relative vapor density, air =1). 
The explosion limits in air are 1.1% (80°C) and 8.4% (145°C). 
The hydroxyl reaction rate constant is 3.76e-11 cm3/molecule*sec, and the spontaneous combustion temperature is 260°C.

Propylene Glycol Monobutyl Ether Chemical Properties
Melting point: -15.45°C (estimate)
Boiling point: 170 °C
Density: 0,88 g/cm3
Vapor pressure: 1.39hPa at 19.85℃
Refractive index: n20/D 1.416(lit.)
Fp: 62°C
Solubility: Soluble in water
Form: clear liquid
Pka: 14.49±0.20(Predicted)
Color: Colorless to Almost colorless
Odor: Ether-like odor
Odor Threshold: 0.16ppm
Water Solubility: 55g/L at 20℃
LogP: 1.2 at 20℃
CAS DataBase Reference: 5131-66-8(CAS DataBase Reference)
EPA Substance Registry System: Propylene Glycol Monobutyl Ether (5131-66-8)