2-METHYL OCTANAL Property

Melting point:

-18°C (estimate)

Boiling point:

189.85°C (estimate)

Density 

0.8410

refractive index 

1.4230

FEMA 

2727 | 2-METHYLOCTANAL

storage temp. 

Inert atmosphere,Store in freezer, under -20°C

solubility 

Insoluble in water, soluble in alcohol and oils.

form 

Colourless oily liquid.

Odor

at 100.00 %. floral rose lily muguet

Odor Type

floral

JECFA Number

270

LogP

3.38

EPA Substance Registry System

Octanal, 2-methyl- (7786-29-0)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

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

2-METHYL OCTANAL Chemical Properties,Usage,Production

Description

2-Methyloctanal has a delicate, floral odor (rose- or lily-like). Prepared by heating methoxymethyl hexyl carbinol with oxalic acid or with anhydrous formic acid; also from hexanal and propionic aldehyde, Darzen’s synthesis of reacting methyl hexyl ketone and ethyl chloroacetate with sodium ethylate; the resulting ester is then hydrolyzed to the acid and this heated under vacuum.

Chemical Properties

2-Methyloctanal has a delicate, floral odor, rose- or lily-like

Uses

In effect more versatile than Methyl nonyl acetaldehyde, 2-methyloctanal creates floral-diffusive topnotes in a Lily or Muguet, freshness in Mimosa or Rose, gives clean and airy topnotes to Citrus fragrances, etc. It finds some use in flavor compositions, mainly in Citrus types where it may partly or wholly substitute the conventional Nonanal. Concentration used is about 1 to 2 ppm in the finished product.

Definition

ChEBI: 2-Methyloctanal is a fatty aldehyde.

Safety Profile

Low toxicity by ingestion and skin contact. A skin irritant. When heated to decomposition it emits acrid smoke and irritating fumes.

Synthesis

By heating methoxymethyl hexyl carbinol with oxalic acid or with anhydrous formic acid; also from hexanal and propionic aldehyde, Darzen’s synthesis of reacting methyl hexyl ketone and ethyl chloroacetate with sodium ethylate; the resulting ester is then hydrolyzed to the acid and this heated under vacuum.