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| Crotonaldehyde | CAS 4170-30-3 | ||
| CH3CH=CHCHO | RTECS GP9499000 | ||
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Synonyms & Trade Names 2-Butenal, beta-Methyl acrolein, Propylene aldehyde |
DOT ID & Guide 1143 131P (inhibited) |
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Exposure Limits |
NIOSH REL: TWA 2 ppm (6 mg/m3) See Appendix C (Aldehydes) | ||
| OSHA PEL: TWA 2 ppm (6 mg/m3) | |||
| IDLH 50 ppm | Conversion 1 ppm = 2.87 mg/m3 | ||
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Physical Description Water-white liquid with a suffocating odor. [Note: Turns pale-yellow on contact with air.] |
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MW: 70.1 |
BP: 219°F |
FRZ: -101°F |
Sol: 18% |
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VP: 19 mmHg |
IP: 9.73 eV |
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Sp.Gr: 0.87 |
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Fl.P: 45°F |
UEL: 15.5% |
LEL: 2.1% |
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| Class IB Flammable Liquid: Fl.P. below 73�F and BP at or above 100�F. | |||
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Incompatibilities & Reactivities Caustics, ammonia, strong oxidizers, nitric acid, amines [Note: Polymerization may occur at elevated temperatures, such as in fire conditions.] |
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Measurement Methods NIOSH 3516; OSHA 81 |
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Personal Protection & Sanitation 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 |
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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 |
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| Exposure Routes inhalation, ingestion, skin and/or eye contact | |
| Symptoms Irritation eyes, respiratory system; in animals: dyspnea (breathing difficulty), pulmonary edema, irritation skin | |
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Target Organs
Eyes, skin, respiratory system |
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| See also: INTRODUCTION |