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Propylene glycol methyl ether is an organic solvent with a wide variety of industrial and commercial uses.
Similar to other glycol ethers, Propylene glycol methyl ether is used as a carrier/solvent in printing/writing inks and paints/coatings.
Propylene glycol methyl ether also finds use as an industrial and commercial paint stripper.
CAS: 107-98-2
MF: C4H10O2
MW: 90.12
EINECS: 203-539-1
Synonyms
203-539-1;1-Methoxy-2-propanol, 99.5%, mixture of isomers;Methoxy Propanol (PM);1-Methoxy-2-propanol, 98.5%, extra pure;1-Methoxy-2-propanol, 98.5% 1LT;1-Methoxy-2-propanol, 98.5% 25ML;1,2-PROPYLENEGLYCOL-1-METHYL ETHER;1-Methoxy-2-hydroxypropane
Propylene glycol methyl ether is used as an antifreeze in diesel engines.
Propylene glycol methyl ether has been used as an antifreeze material, principally in ebullient cooling systems and in some heavy-duty diesel engines.
Because an azeotrope is formed between 1-methoxy-2-propanol and water, freeze protection also is provided in the vapor phase in ebullient cooling applications.
On the other hand, Propylene glycol methyl ether is more volatile and is more readily expelled along with water vapor through the crankcase vent system.
Propylene glycol methyl ether also maintains lower metal temperatures than comparative glycolbased coolants.
This was an advantage in rotary engines.
Propylene glycol methyl ether is an organic compound that belongs to the family of glycol ethers.
Propylene glycol methyl ether has the chemical formula C₄H₁₀O₂ and is known for its excellent solvent properties, low toxicity, and versatility in industrial and commercial applications.
Propylene glycol methyl ether has a high water solubility, excellent solvent with good coupling properties making it suitable for cleaning solutions and coating applications.
This hydrophilic solvent has 100% water solubility and is ideally suited as a coupling agent in a wide range of solvent systems.
Propylene glycol methyl ether is a colorless liquid with a slight ethereal odor that is used as an excellent industrial solvent with low toxicity and has strong solubility for polar and unpolar materials, which can be used for advanced paints, printing inks as well as some other polymers including glycol acid resin, acrylic acid resin, epoxy resin and nitrocellulose.
Propylene glycol methyl ether is a photoresist solvent.
Propylene glycol methyl ether's degradation by microorganisms in different soil types has been investigated.
An oral reference dose (RfD) value of PGMEA has been obtained from inhalation studies.
The solubility of (5-alkylsulfonyloxyimino-5H-thiophen-2-ylidene)-2-methylphenyl-acetonitriles in PGMEA has been analyzed.
Propylene glycol methyl ether Chemical Properties
Melting point: -97 °C
Boiling point: 118-119 °C(lit.)
Density: 0.922 g/mL at 25 °C(lit.)
Vapor density: 3.12 (vs air)
Vapor pressure: 10.9 mm Hg ( 25 °C)
Refractive index: n20/D 1.403(lit.)
Fp: 93 °F
Storage temp.: Store at +2°C to +25°C.
Solubility: water: miscible
Form: Liquid
pka: 14.49±0.20(Predicted)
Color: Colorless
PH: 4-7 (200g/l, H2O, 20℃)
Odor: sweet ether-like odor
Explosive limit: 1.7-11.5%(V)
Water Solubility: soluble
Sensitive: Hygroscopic
BRN: 1731270
Exposure limits: TLV-TWA 100 ppm (370 mg/m3) (ACGIH); STEL 150 ppm (555 mg/m3) (ACGIH).
Stability: Stable. Highly flammable. Incompatible with strong oxidizing agents, acid chlorides, acid anhydrides, water. Moisture-sensitive.
InChIKey: ARXJGSRGQADJSQ-UHFFFAOYSA-N
LogP: 0.37 at 20℃
CAS DataBase Reference: 107-98-2(CAS DataBase Reference)
NIST Chemistry Reference: Propan-2-ol, 1-methoxy-(107-98-2)
EPA Substance Registry System: Propylene glycol methyl ether (107-98-2)
Propylene glycol methyl ether is a colorless liquid with a sweet ether-like odor and bitter taste.
Propylene glycol methyl ether is soluble in water, ether, acetone, and benzene.
Uses
Propylene glycol methyl ether is primarily used in the manufacture of lacquers and paints, as an anti-freeze in industrial engines, a tailing agent for inks used on very high-speed presses, a coupling agent for resins and dyes in waterbased inks, and a solvent for celluloses, acrylics, dyes, inks, and stains.
Propylene glycol methyl ether is also used in cleaning products such as glass and rug cleaners, carbon and grease removers, and paint and varnish removers; and in pesticide formulations as a solvent for applications to crops and animals.
Propylene glycol methyl ether has been used in the development of fluidic channels to be incorporated in a poly(dimethylsiloxane) (PDMS)-based microfluidic device.
Reactivity Profile
Propylene glycol methyl ether is a methoxy alcohol derivative.
The ether being relatively unreactive.
Flammable and/or toxic gases are generated by the combination of alcohols with alkali metals, nitrides, and strong reducing agents.
They react with oxoacids and carboxylic acids to form esters plus water.
Oxidizing agents convert them to aldehydes or ketones.
Alcohols exhibit both weak acid and weak base behavior.
They may initiate the polymerization of isocyanates and epoxides.
Synthesis
Propylene glycol methyl ether is prepared by reacting propylene oxide with methanol in the presence of a racemic catalyst which comprises an asymmetric polydentate (tetradentate) ligand complexed with a metal atom, where the complex has an approximately planar geometry.
