TRANS-2-NONENAL

Synonym(s):(E)-2-Nonenal

CAS NO.：18829-56-6
Empirical Formula: C9H16O
Molecular Weight: 140.22
MDL number: MFCD00007012
EINECS: 242-609-6
SAFETY DATA SHEET (SDS)
Update Date: 2026-01-13 11:19:02

What is TRANS-2-NONENAL?

Chemical properties

CLEAR COLOURLESS TO PALE YELLOW LIQUID

The Uses of TRANS-2-NONENAL

trans-2-Nonenal is an unsaturated aldehyde that is a product of fatty acid peroxidation (and also has a grassy, cucumber smell). trans-2-Nonenal is naturally found in mushrooms, coffee and is also a constituent of carrot root. It also exhibits insecticidal effects.

Definition

ChEBI: (E)-non-2-enal is a monounsaturated fatty aldehyde that is (2E)-non-2-ene which is carrying an oxo group at position 1. It has a role as a plant metabolite. It is a monounsaturated fatty aldehyde, an enal and a medium-chain fatty aldehyde.

Synthesis Reference(s)

Tetrahedron Letters, 24, p. 4829, 1983 DOI: 10.1016/S0040-4039(00)94018-8

General Description

trans-2-Nonenal (T2N) is a volatile unsaturated aldehyde with an unpleasant greasy odor, present in low concentrations in barley, malt, and certain vegetables. It is utilized as an insect repellent, insecticide, and flavor compound. T2N is one of the basic components contributing to the off-flavor and odor in stored beer.

Properties of TRANS-2-NONENAL

Melting point:	-28°C (estimate)
Boiling point:	88-90 °C12 mm Hg(lit.)
Density	0.846 g/mL at 25 °C(lit.)
vapor density	>1 (vs air)
refractive index	n20/D 1.453(lit.)
FEMA	3213 \| 2-NONENAL
Flash point:	184 °F
storage temp.	Refrigerator (+4°C)
solubility	Chloroform (Slightly), Methanol (Slightly)
form	Liquid
color	Clear colorless to pale yellow
Odor	at 1.00 % in dipropylene glycol. fatty green cucumber aldehydic citrus
Water Solubility	Soluble in Alcohol , and oils. Insoluble in water.
Sensitive	Air Sensitive
JECFA Number	1362
Merck	14,6676
CAS DataBase Reference	18829-56-6(CAS DataBase Reference)
EPA Substance Registry System	2-Nonenal, (2E)- (18829-56-6)

Safety information for TRANS-2-NONENAL

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.