Propylene glycol monomethyl ether
Synonyms & Trade Names
Dowtherm® 209, 1-Methoxy-2-hydroxypropane, 2-Methoxy-1-methylethanol, 1-Methoxy-2-propanol, Propylene glycol methyl etherExposure Limits
NIOSH REL
TWA 100 ppm (360 mg/m3) ST 150 ppm (540 mg/m3)OSHA PEL
none See Appendix GPhysical Description
Clear, colorless liquid with a mild, ethereal odor.Molecular Weight
90.1Boiling Point
248°FFreezing Point
-139°F (Sets to glass)Solubility
MiscibleVapor Pressure
(77°F): 12 mmHgIonization Potential
?Specific Gravity
0.96Flash Point
97°FUpper Exposive Limit
(calc): 13.8%Lower Explosive Limit
(calc.): 1.6%
Class IC Flammable Liquid: Fl.P. at or above 73°F and below 100°F.
Incompatibilities & Reactivities
Oxidizers, strong acids [Note: Hygroscopic (i.e., absorbs moisture from the air). May slowly form reactive peroxides during prolonged storage.]Exposure Routes
inhalation, ingestion, skin and/or eye contactSymptoms
irritation eyes, skin, nose, throat; headache, nausea, dizziness, drowsiness, incoordination; vomiting, diarrheaTarget Organs
Eyes, skin, respiratory system, central nervous systemPersonal Protection/Sanitation
(See protection codes)Skin:No recommendation
Eyes:Prevent eye contact
Wash skin:No recommendation
Remove:When wet (flammable)
Change:No recommendation
First Aid
(See procedures)Eye:Irrigate immediately
Skin:Water wash
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations
Not available.
- Page last reviewed:April 11, 2016
- Page last updated:April 11, 2016
- Content source:
- National Institute for Occupational Safety and Health (NIOSH) Education and Information Division