Agent Name

3-Methyl-2-butenal

Alternative Name

Senecialdehyde

CAS Number

107-86-8

Formula

C5-H8-O

Major Category

Other Classes

Synonyms

2-Butenal, 3-methyl-; 3,3-Dimethylacrolein; 3-Methylcrotonaldehyde; beta,beta-Dimethylacrolein; beta,beta-Dimethylacrylic aldehyde; beta-Methylcrotonaldehyde; Crotonaldehyde, 3-methyl-; Prenal; Senecialdehyde; Senecioaldehyde; [ChemIDplus] 3-Methylbuten-2-al-1; [OECD SIDS: IUCLID Data Set] 3-Methylbut-2-enal; [ToxPlanet: ECHA REACH Registrations]

Category

Aldehydes

Description

Colorless to yellow liquid with a pungent odor; [ICSC] Colorless liquid; [Alfa Aesar MSDS]

Sources/Uses

Used as a flavoring agent; [FDA] Used to make citral and other chemicals and for the reconstitution of essential oils and other natural products; [OECD SIDS: IUCLID Data Set]

Comments

A mucous membrane irritant; May have narcotic effects at high concentration; [Merck Index] Corrosive to skin and eyes; A respiratory tract irritant; Inhalation of high concentrations can cause lowering of consciousness; May cause skin sensitization; Chronic exposure may cause tissue lesions in the respiratory tract; Can be absorbed through skin; [ICSC] Safe when used as a flavoring agent in food; [JECFA] Causes burns; May cause skin sensitization; Harmful by ingestion and inhalation; [OECD SIDS: IUCLID Data Set] An irritant that may cause serious eye injury; May cause skin sensitization; Harmful by ingestion and inhalation; [Alfa Aesar MSDS]

Exposure Assessment
Vapor Pressure

5.6 mm Hg

Lethal Concentration

LC50 (rat) = 3,700 mg/m3/4hr

Adverse Effects
Skin Sensitizer

Yes

Dermatotoxin

Skin Burns

Links to Other NLM Databases
Toxicity Information

Search TOXNET

Chemical Information

Search ChemIDplus

Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent: