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Propylene oxide

Synonyms & Trade Names
1,2-Epoxy propane; Methyl ethylene oxide; Methyloxirane; Propene oxide; 1,2-Propylene oxide
CAS No.
75-56-9
RTECS No.
TZ2975000
DOT ID & Guide
1280 127P
Formula
C3H6O
Conversion
1 ppm = 2.38 mg/m3
IDLH
Ca [400 ppm]
See: 75569
Exposure Limits
NIOSH REL
: Ca See Appendix A
OSHA PEL
†: TWA 100 ppm (240 mg/m3)
Measurement Methods

NIOSH 1612;
OSHA 88
See: NMAM or OSHA Methods
Physical Description
Colorless liquid with a benzene-like odor. [Note: A gas above 94°F.]
MW:
58.1
BP:
94°F
FRZ:
-170°F
Sol:
41%
VP:
445 mmHg
IP:
9.81 eV
Sp.Gr:
0.83
Fl.P:
-35°F
UEL:
36%
LEL:
2.3%
Class IA Flammable Liquid: Fl.P. below 73°F and BP below 100°F.
Incompatibilities & Reactivities
Anhydrous chlorides of iron, tin, and aluminum; peroxides of iron and aluminum; alkali metal hydroxides; iron; strong acids, caustics & peroxides [Note: Polymerization may occur due to high temperatures or contamination with alkalis, aqueous acids, amines & acidic alcohols.]
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, respiratory system; skin blisters, burns; [potential occupational carcinogen]
Target Organs
Eyes, skin, respiratory system
Cancer Site
[in animals: nasal tumors]
Personal Protection/Sanitation
(See protection codes)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet (flammable)
Change: No recommendation
Provide: Quick drench
First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Water flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations

NIOSH

At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(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

Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 0192
 

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