TRANS-2-METHYL-2-BUTENAL Property

Melting point:

-101.15°C (estimate)

Boiling point:

116-119 °C752 mm Hg(lit.)

Density 

0.871 g/mL at 25 °C(lit.)

refractive index 

n20/D 1.448(lit.)

FEMA 

3407 | 2-METHYL-2-BUTENAL

Flash point:

65 °F

storage temp. 

Flammables area

solubility 

soluble in Chloroform

form 

Liquid

color 

Clear colorless to yellow

Odor

at 0.10?%?in?dipropylene glycol. strong green fruit

Water Solubility 

Soluble in water

Sensitive 

Air Sensitive

JECFA Number

1201

BRN 

1698207

Stability:

Air sensitive, Light Sensitive

LogP

1.065 (est)

CAS DataBase Reference

497-03-0(CAS DataBase Reference)

EPA Substance Registry System

trans-2-Methylcrotonaldehyde (497-03-0)

Safety

Hazard Codes 

F,Xi

Risk Statements 

11-36/37/38-10

Safety Statements 

16-26-36

RIDADR 

UN 1989 3/PG 2

WGK Germany 

3

TSCA 

Yes

HazardClass 

3

PackingGroup 

II

HS Code 

29121990

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H225Highly Flammable liquid and vapour

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P233Keep container tightly closed.

P240Ground/bond container and receiving equipment.

P241Use explosion-proof electrical/ventilating/lighting/…/equipment.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

TRANS-2-METHYL-2-BUTENAL Chemical Properties,Usage,Production

Description

2-Methyl-2-butenal has a penetrating, powerful green ethereal odor. May be prepared by condensation of acetaldehyde and propionaldehyde.

Chemical Properties

trans-2-Methyl-2-butenal is a clear colorless to yellow liquid. B.P. 135℃. Sp.Gr. 0.87. Almost insoluble in water, soluble in alcohol and oils. Powerful and very diffusive, penetrating “gassy” odor of green-ethereal character. Very poor tenacity.

Uses

Tiglic aldehyde was used in the concise total synthesis of 7-demethylpiericidin A1. It was used as starting reagent during the synthesis of:

• alkyl-branched tetraene hydrocarbons, pheromone component for dried fruit beetle
• E,E-2,4-dimethyl-2,4-hexa dienal, volatile constituents of the defensive secretions of Leiobunum nigripalpi
• 4-methyl-2,4-hexadiene-1-ol

General Description

trans-2-Methyl-2-butenal is one of the major volatile constituents of coriander and olive oil.