7-Methoxy-3,7-dimethyloctanal

CAS NO.：3613-30-7
Empirical Formula: C11H22O2
Molecular Weight: 186.29
MDL number: MFCD00007015
EINECS: 222-784-5
SAFETY DATA SHEET (SDS)
Update Date: 2026-09-12 18:55:52

What is 7-Methoxy-3,7-dimethyloctanal?

Chemical properties

clear colorless liquid

Chemical properties

Methoxydihydrocitronellal is a colorless liquid with a fresh, green, blossom odor and is used in perfumery in floral compositions for fresh, green nuances.

Occurrence

Has apparently not been reported to occur in nature.

The Uses of 7-Methoxy-3,7-dimethyloctanal

It is used in many types of floral fragrances, in floral bases, particularly recommended for Ylang-Ylang bases. It blends very well with the “rose” alcohols, with the Cinnamic derivatives and with the Eugenols, Benzylacetate and other common ingredients. It needs more fixation than Hydroxycitronellal which in itself is a fixative, but it also offers fresh-green, almost vegetable-green notes, not found in Hydroxycitronellal, and not found so pleasantly effective in Cyclamen aldehyde. Its softness makes it easy to use, hard to overdose.

Preparation

By catalytic methylation of hydroxycitronellal (Arctander, 1969)

Metabolism

On rice and alfalfa, methoxycitronellal formed as a metabolite of the insect-growth regulator, methoprene, was converted to methoxycitronellic acid and hydroxycitronellic acid and their conjugates (Quistad et al. 1974)

Properties of 7-Methoxy-3,7-dimethyloctanal

Boiling point:	60 °C (0.4 mmHg)
Density	0.87
refractive index	1.4364-1.4384
Flash point:	98 °C
solubility	Almost insoluble in water, soluble in alcohol and oils, fairly soluble in Propylene glycol.
form	slightly oily liquid
color	A colourless liquid.
Odor	at 100.00 %. fresh melon floral lily sweet
EPA Substance Registry System	Octanal, 7-methoxy-3,7-dimethyl- (3613-30-7)

Safety information for 7-Methoxy-3,7-dimethyloctanal

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.