Rose ketones (CAS 33673-71-1) — Mid Note Fragrance Ingredient

ByThe Good Scents



terpenic

Rose ketones

CAS 33673-71-1

Note
mid
Volatility
medium
MW
192.3
Data as of: Jun 2026

What Is Rose ketones?

Rose ketones (CAS 33673-71-1) is an aroma chemical used as a fragrance and flavour ingredient. Its odour is described as fruity, floral and plum, placing it within the terpenic family as a mid note with medium volatility. With a molecular weight of 192.3 (formula C13H20O), it is handled by perfumers as a building block for compositions where a fruity character is desired. The data below is compiled from public chemical and regulatory sources.

Safety Profile

USE WITH AWARENESS

Generally safeUse with awarenessProfessional use
CAS
33673-71-1
Formula
C13H20O
MW
192.3
InChIKey
NELDPSDYTZADSA-UHFFFAOYNA-N
Rose ketones 2D structure

Rose ketones
C13H20O
Layer 1 · Enthusiast

What Does Rose ketones Smell Like?

The odour profile of Rose ketones is reported as fruity, floral, plum, rose, tobacco, apple. The dominant facet is its fruity character, with the remaining notes adding nuance and complexity. As a mid note it contributes to the heart of a fragrance. Perceived intensity and exact character depend on concentration, the carrier and the surrounding accord.

Scent Profile

Profile derived from public odour-descriptor data; relative, not absolute.

Layer 2

Chemistry & Properties

The Chemistry

Rose ketones has the molecular formula C13H20O and a molecular weight of 192.3 g/mol. Its canonical SMILES representation is CC=CC(=O)C1CCC(C)(C)C=C1C. Its reported log P (XLogP) of 3.51 indicates a lipophilic, oil-soluble molecule, which informs how it partitions in a formula. Physical constants below are drawn from PubChem and EPA CompTox public datasets.

Physical & Chemical Properties

Molecular Weight 192.3 g/mol
Boiling Point 255.9 °C
Melting Point 28.77 °C
Flash Point 107.0 °C
Density 0.8558 g/cm³
Vapor Pressure 0.01404 mmHg
Water Solubility 0.0014 g/L
XLogP 3.51

Perfumer Guide

Note Position
Mid
Volatility
Medium
Primary Odour
Fruity

Alternatives & Comparisons

Ingredients occupying a similar odour space — useful as substitutes or companions when Rose ketones is unavailable or restricted.

1
1-(2,6,6-trimethylcyclohex-3-en-1-yl)but-2-en-1-one CAS 71048-82-3

Shares apple, floral, fruity character — a candidate substitute or companion in the same odour space.

2
Rose ketones CAS 59739-63-8

Shares apple, floral, fruity character — a candidate substitute or companion in the same odour space.

3
1-(2,4,4-Trimethyl-1-cyclohexen-1-yl)-2-buten-1-one CAS 70266-48-7

Shares floral, fruity, honey character — a candidate substitute or companion in the same odour space.

Layer 3

Safety & Regulatory

⚠ Regulatory Disclaimer

General reference only. IFRA, REACH and EU Cosmetics Regulation standards update periodically. Consult the current IFRA Standards Library before formulating. Not legal or regulatory advice.

IFRA Status

Subject to an IFRA restriction (51st Amendment) — maximum use levels apply by product category. Consult the current IFRA Standards Library before formulating.

GHS Classification

Signal word: Warning

H317
Formulating with Rose ketones?

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References & Sources

  1. PubChem Compound Summary (NIH) — search by InChIKey
  2. EPA CompTox Chemicals Dashboard — physicochemical & fate data
  3. IFRA Standards Library (49th / 51st Amendment)
Sources: PubChem (NIH) · EPA CompTox · IFRA Standards Library · public GHS classification. Odour descriptors are original editorial summaries of public profiles, not reproduced from any single proprietary source.

Data: PubChem (NIH), EPA CompTox, IFRA. Last reviewed: Jun 2026.

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