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Propylene oxide																				Related Pages
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 RELCa See Appendix A
					OSHA PEL TWA 100 ppm (240 mg/m3) See Appendix G
	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.]													
										
Molecular Weight58.1	
	Boiling Point94°F
	Freezing Point-170°F
	Solubility41%
	Vapor Pressure445 mmHg
	Ionization Potential9.81 eV											
Specific Gravity0.83	
	Flash Point-35°F
	Upper Explosive Limit36%
	Lower Explosive Limit2.3%
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 concernAny appropriate escape-type, self-contained breathing apparatus
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 0192

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
Introduction
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Chemical Names, Synonyms and Trade Names
A
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C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
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Z
CAS Numbers
RTECS Numbers
Appendices
A – NIOSH Potential Occupational Carcinogens
B – Thirteen OSHA-Regulated Carcinogens
C – Supplementary Exposure Limits
D – Substances with No Established RELs
E – OSHA Respirator Requirements for Selected Chemicals
F – Miscellaneous Notes
G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect
Type C & CE – Definitions for Type C and Type CE Respirators
Personal Protection and Sanitation Codes
First Aid Procedures Follow NIOSH Facebook
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