Crotonaldehyde

Synonyms

1-Formylpropene; 2-Butenal; 2-Butenaldehyde; AI3-18303 (USDA); Crotonal; Crotonic aldehyde; Crotylaldehyde; Krotonaldehyd [Czech]; Methylpropenal; Propylene aldehyde; UN 1143; beta-Methylacrolein; [ChemIDplus] UN1143

Category

Other Toxic Gases & Vapors

Description

Water-white liquid with a suffocating odor; Note: Turns pale-yellow on contact with air; [NIOSH]

Sources/Uses

Used in the synthesis of other organic chemicals; [ACGIH]

Comments

Rats exposed to 1500 ppm, a lethal concentration, develop pulmonary edema. [ACGIH] Liquid causes second degree burns after contact for a few minutes. [CHRIS] Also CAS # 123-73-9; A lachrymator; [CHEMINFO] Corrosive to the eyes; Causes lachrymation; Can cause pulmonary edema; [ICSC] Crotonaldehyde (UN1143) has warning of explosive polymerization; [ERG 2016]

Reference Link #1

Biomedical References

Yes

Yes

0.3 ppm

2 ppm

50 ppm

Excerpts from Documentation for IDLHs

Human data: Exposure to 4.1 ppm for 15 minutes was highly irritating to the nose and upper respiratory tract and produced lacrimation in 30 seconds [Sim and Pattle 1957]. In another study, exposures to 45 ppm proved very disagreeable after a few seconds, with conjunctival irritation evident [Rinehart 1967].

30 mm Hg

0.06 ppm

Odor Threshold High

0.2 ppm

3 ppm

LC50 (rat) = 200 mg/m3/2H

Yes

Explanatory Notes

Detection odor threshold from AIHA (mean = 0.11 ppm); The Guide from the Emergency Response Guidebook is for "crotonaldehyde, inhibited." Flash point = 13 deg C; VP from HSDB;

Reference Link #2

may ignite at ambient temp

0.2 ppm

5 ppm

15 ppm

Yes

Yes

Skin burns

Possible (2b)

Confirmed Animal

Diseases

Occupational diseases associated with exposure to this agent:

• Pneumonitis, toxic