NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

Propylene glycol monomethyl ether

CAS
107-98-2

CH3OCH2CHCH3

RTECS
UB7700000
Synonyms & Trade Names

Dowtherm® 209; 1-Methoxy-2-hydroxypropane; 1-Methoxy-2-propanol; 2-Methoxy-1-methylethanol; Propylene glycol methyl ether
DOT ID & Guide

Exposure
Limits

NIOSH REL: TWA 100 ppm (360 mg/m3) ST 150 ppm (540 mg/m3)
OSHA PEL: none
IDLH
N.D. See: IDLH INDEX
Conversion
1 ppm = 3.69 mg/m3
Physical Description
Clear, colorless liquid with a mild, ethereal odor.
MW: 90.1
BP: 248°F
FRZ: -139°F (Sets to glass)
Sol: Miscible
VP(77°F): 12 mmHg
IP: ?

Sp.Gr: 0.96
Fl.P: 97°F
UEL(calc): 13.8%
LEL(calc.): 1.6%

Class IC Flammable Liquid: Fl.P. at or above 73F and below 100F.
Incompatibilities & Reactivities

Oxidizers, strong acids [Note: Hygroscopic (i.e., absorbs moisture from the air). May slowly form reactive peroxides during prolonged storage.]
Measurement Methods
NIOSH 2554; OSHA 99
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
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.
Important additional information about respirator selection
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
Irritation eyes, skin, nose, throat; headache, nausea, dizziness, drowsiness, incoordination; vomiting, diarrhea
Target Organs
Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION   See ICSC CARD: 0551