NIOSH Pocket Guide to Chemical Hazards


CAS 556-52-5


RTECS UB4375000
Synonyms & Trade Names
2,3-Epoxy-1-propanol; Epoxypropyl alcohol; Glycide; Hydroxymethyl ethylene oxide; 2-Hydroxymethyl oxiran; 3-Hydroxypropylene oxide
DOT ID & Guide


NIOSH REL: TWA 25 ppm (75 mg/m3)
OSHA PEL: TWA 50 ppm (150 mg/m3)
IDLH 150 ppm See: 556525 Conversion 1 ppm = 3.03 mg/m3
Physical Description
Colorless liquid.
MW: 74.1
BP: 320°F (Decomposes)
FRZ: -49°F
Sol: Miscible
VP(77°F): 0.9 mmHg
IP: ?

Sp.Gr: 1.12
Fl.P: 162°F
UEL: ?
LEL: ?

Class IIIA Combustible Liquid: Fl.P. at or above 140F and below 200F.
Incompatibilities & Reactivities
Strong oxidizers, nitrates
Measurement Methods
NIOSH 1608; OSHA 7
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
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
Up to 150 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/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, nose, throat; narcosis
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION   See ICSC CARD: 0159