NIOSH Pocket Guide to Chemical Hazards

Dipropylene glycol methyl ether

CAS 34590-94-8


RTECS JM1575000
Synonyms & Trade Names
Dipropylene glycol monomethyl ether; Dowanol® 50B
DOT ID & Guide


NIOSH REL: TWA 100 ppm (600 mg/m3) ST 150 ppm (900 mg/m3) [skin]
OSHA PEL: TWA 100 ppm (600 mg/m3) [skin]
IDLH 600 ppm See: 34590948 Conversion 1 ppm = 6.06 mg/m3
Physical Description
Colorless liquid with a mild, ether-like odor.
MW: 148.2
BP: 408°F
FRZ: -112°F
Sol: Miscible
VP: 0.5 mmHg
IP: ?

Sp.Gr: 0.95
Fl.P: 180°F
UEL: 3.0%
LEL(392°F): 1.1%

Class IIIA Combustible Liquid: Fl.P. at or above 140F and below 200F.
Incompatibilities & Reactivities
Strong oxidizers
Measurement Methods
NIOSH 2554, S69 (II-2)
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
Skin: No recommendation
Eyes: No recommendation
Wash skin: No recommendation
Remove: No recommendation
Change: No recommendation

First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water wash promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
Important additional information about respirator selection
Respirator Recommendations NIOSH/OSHA
Up to 600 ppm:
(APF = 10) Any supplied-air respirator
(APF = 50) Any self-contained breathing apparatus with a full facepiece
Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister having an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters./Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, nose, throat; lassitude (weakness, exhaustion), dizziness, headache
Target Organs Eyes, respiratory system, central nervous system
See also: INTRODUCTION   See ICSC CARD: 0884