2-Isopropyl-5-methyl-2-hexenal

CAS NO.：35158-25-9
Empirical Formula: C10H18O
Molecular Weight: 154.25
MDL number: MFCD00036616
EINECS: 252-406-4
SAFETY DATA SHEET (SDS)
Update Date: 2026-08-28 09:47:22

What is 2-Isopropyl-5-methyl-2-hexenal?

Description

The derivatives are concrete and absolute. The concrete is prepared in approximately 1.5 to 2.0% yields by solvent extraction (ben zene, petroleum ether) of the freshly cut flowering herb. It is a dark-green, viscous mass. An absolute is obtained in approxi mately 45% yields by distillation of the concrete with diethylene glycol.

Chemical properties

2-Isopropyl-5-methyl-2-hexenal has a fruity, blueberry odor.

Occurrence

Reported found in cocoa

Preparation

By aldol condensation of isovaleraldehyde

Aroma threshold values

Aroma characteristics at 1.0%: woody, musty, nutshell-like, slightly floral and cooling with a honey and cocoa creamy nuance.

Taste threshold values

Taste characteristics at 10 ppm: woody, nutshell, cocoa hulls, thiazole-like creamy nuance and a fresh, fruity peachlike nuance.

General Description

2-Isopropyl-5-methyl-2-hexenal is a volatile aroma constituent of malted barley and roasted coffee beans. It can be formed via Maillard reaction between leucine and 3-methylbutanal.

Properties of 2-Isopropyl-5-methyl-2-hexenal

Boiling point:	189 °C(lit.)
Density	0.845 g/mL at 25 °C(lit.)
refractive index	n20/D 1.452(lit.)
FEMA	3406 \| 2-ISOPROPYL-5-METHYL-2-HEXENAL
Flash point:	145 °F
form	Liquid
color	A colourless oily liquid
Odor	at 100.00 %. herbal lavender woody green blueberry tomato
Sensitive	Air Sensitive
JECFA Number	1215
BRN	1752384
CAS DataBase Reference	35158-25-9(CAS DataBase Reference)
NIST Chemistry Reference	2-Isopropyl-5-methylhex-2-enal(35158-25-9)
EPA Substance Registry System	2-Hexenal, 5-methyl-2-(1-methylethyl)- (35158-25-9)

Safety information for 2-Isopropyl-5-methyl-2-hexenal

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H315:Skin corrosion/irritation H317:Sensitisation, Skin H319:Serious eye damage/eye irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P272:Contaminated work clothing should not be allowed out of the workplace. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.