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Crotonaldehyde																				Related Pages
Synonyms & Trade Names
			2-Butenal, β-Methyl acrolein, Propylene aldehyde
CAS No.
			4170-30-3
	RTECS No.
			GP9499000
	DOT ID & Guide
			1143 131P(inhibited)

FormulaCH3CH=CHCHO
	Conversion
			1 ppm = 2.87 mg/m3
	IDLH
			50 ppmSee: 123739

Exposure Limits
			NIOSH RELTWA 2 ppm (6 mg/m3) See Appendix C (Aldehydes)
					OSHA PEL TWA 2 ppm (6 mg/m3)
	Measurement Methods
			**NIOSH** 3516;**OSHA** 81
					
					See: NMAM or OSHA Methods
										
Physical Description
			Water-white liquid with a suffocating odor.
					[Note: Turns pale-yellow on contact with air.]													
										
Molecular Weight70.1	
	Boiling Point219°F
	Freezing Point-101°F
	Solubility18%
	Vapor Pressure19 mmHg
	Ionization Potential9.73 eV											
Specific Gravity0.87	
	Flash Point45°F
	Upper Explosive Limit15.5%
	Lower Explosive Limit2.1%
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities
			Caustics, ammonia, strong oxidizers, nitric acid, amines
					[Note: Polymerization may occur at elevated temperatures, such as in fire conditions.]
Exposure Routes
			inhalation, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, respiratory system; In Animals: dyspnea (breathing difficulty), pulmonary edema, irritation skin
Target Organs
			Eyes, skin, respiratory system
										
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:**Eyewash, Quick drench
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Water flush immediately
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			**NIOSH/OSHA****Up to 20 ppm**: (APF = 10) Any chemical cartridge respirator with organic vapor cartridge(s)*(APF = 10) Any supplied-air respirator***Up to 50 ppm**: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode*(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)*(APF = 50) Any chemical cartridge respirator with a full facepiece and organic vapor cartridge(s)(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister(APF = 50) Any self-contained breathing apparatus with a full facepiece(APF = 50) Any supplied-air respirator 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**Escape:** (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canisterAny appropriate escape-type, self-contained breathing apparatus
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 0241

			
							

			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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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
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