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 Explosive 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

Crotonaldehyde

NIOSH REL

OSHA PEL

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