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 |
FormulaC3H6O |
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% |
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| 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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