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Crotonaldehyde

Synonyms & Trade Names
2-Butenal, β-Methyl acrolein, Propylene aldehyde
CAS No.
4170-30-3
RTECS No.
GP9499000
DOT ID & Guide
1143 131P(inhibited)
Formula
CH₃CH=CHCHO
Conversion
1 ppm = 2.87 mg/m3
IDLH
50 ppm
See: 123739
Exposure Limits
NIOSH REL
TWA 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 Weight
70.1
Boiling Point
219°F
Freezing Point
-101°F
Solubility
18%
Vapor Pressure
19 mmHg
Ionization Potential
9.73 eV
Specific Gravity
0.87
Flash Point
45°F
Upper Exposive Limit
15.5%
Lower Explosive Limit
2.1%
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 canister
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0241

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