TRANS-2-PENTENAL Chemical Properties

Melting point:

-101.15°C (estimate)

Boiling point:

80-81 °C160 mm Hg(lit.)

Density 

0.86 g/mL at 25 °C(lit.)

refractive index 

n20/D 1.440-1.446(lit.)

FEMA 

3218 | 2-PENTENAL

Flash point:

73 °F

Odor

at 1.00 % in dipropylene glycol. pungent green apple orange tomato

Odor Type

green

JECFA Number

1364

LogP

1.281 (est)

EPA Substance Registry System

2-Pentenal (764-39-6)

Safety Information

Hazard Codes 

Xi

Risk Statements 

10-36/37/38

Safety Statements 

29

RIDADR 

UN 1989 3/PG 2

WGK Germany 

3

RTECS 

SB1560000

F 

10

Toxicity

msc-ham:lng 300 mmol/L MUREAV 244,153,90

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

TRANS-2-PENTENAL Usage And Synthesis

Chemical Properties

2-Pentenal has a pungent, green, apple, orange, tomato odor.

Occurrence

Reported found in aqueous orange essence (trans-form); as a flavor component in cognac oil, in Chrysocoris stolli, in tomato aroma, in the autooxidation of cod liver oil, in peas, as a flavoring component of reverted soybean oil, in salmon oil, in potato chips during storage, in butterfat fishy flavor. Also reported found in strawberry, cooked potato, wheat bread, parmesan cheese, butter, caviar, fatty fish, cooked beef, tea, peanuts, peas, trassi, mango, raspberry, pumpkin, Bourbon vanilla, oysters and loganberry.

Preparation

By treating β-phenoxyacrolein with secondary amines, Grignard reagent and active methylene compounds; by heating 1-ethoxy-1,3-pentadiene with H3PO4 at 80°C; from cis- and trans-but-2-ene-1,4-diol and SOCl2, followed by treatment of the chloroalcohol with methyl magnesium bromide and final oxidation with MnO2.

Definition

ChEBI: An enal consisting of pent-2-ene having an oxo group at the 1-position

Safety Profile

Poison by intraperitoneal route. Mutation data reported. Whenheated to decomposition it emits acrid smoke and irritating fumes.

TRANS-2-PENTENAL(764-39-6)Related Product Information

• Succinic acid
• Acetaldoxime
• Acetaldehyde
• ISOAMYL ALCOHOL
• 2-Pentanone
• trans-2-Pentenal
• Valeraldehyde