3,5,5-Trimethyl-2-cyclohexen-1-ol

Synonym(s):Isophorol

CAS NO.：470-99-5
Empirical Formula: C9H16O
Molecular Weight: 140.22
MDL number: MFCD00001554
EINECS: 207-433-6
SAFETY DATA SHEET (SDS)
Update Date: 2026-09-12 18:49:21

3,5,5-Trimethyl-2-cyclohexen-1-ol Structural

What is 3,5,5-Trimethyl-2-cyclohexen-1-ol?

Chemical properties

clear colorless liquid

The Uses of 3,5,5-Trimethyl-2-cyclohexen-1-ol

This alcohol has found a little use in perfume compositions, mainly in Honey-bases as a modifier and powerful ingredient. It blends excellently with Phenylacetic acid and its esters, with Mimosa, Labdanum and the conventional Acetophenone-derivatives, and it is, incidentally, very interesting in YlangYlang.

Synthesis Reference(s)

Journal of the American Chemical Society, 100, p. 2226, 1978 DOI: 10.1021/ja00475a040
The Journal of Organic Chemistry, 47, p. 3311, 1982 DOI: 10.1021/jo00138a021

General Description

3,5,5-Trimethyl-2-cyclohexen-1-ol undergoes oxidation in the presence of palladium on activated charcoal under an ethylene atmosphere to yield the corresponding carbonyl compound.

Synthesis

3,5,5-Trimethyl-2-cyclohexen-1-ol is prepared (several methods) e. g. from isoPhorone by controlled hydrogenation. It has also been prepared from 3,3-Dimethyl cyclohexanol.

Properties of 3,5,5-Trimethyl-2-cyclohexen-1-ol

Boiling point:	79.5-81.5 °C8 mm Hg(lit.)
Density	0.918 g/mL at 25 °C(lit.)
refractive index	n20/D 1.472(lit.)
Flash point:	176 °F
pka	14.74±0.60(Predicted)
BRN	1929064
CAS DataBase Reference	470-99-5
EPA Substance Registry System	2-Cyclohexen-1-ol, 3,5,5-trimethyl- (470-99-5)