o,m,p-Tolualdehydes and their mixtures (CAS 620-23-4) — Mid Note Fragrance Ingredient
o,m,p-Tolualdehydes and their mixtures
CAS 620-23-4
What Is o,m,p-Tolualdehydes and their mixtures?
o,m,p-Tolualdehydes and their mixtures (CAS 620-23-4) is an aroma chemical used as a fragrance and flavour ingredient. Its odour is described as almond, spicy and sweet, placing it within the aldehydic family as a mid note with high volatility. With a molecular weight of 120.2 (formula C8H8O), it is handled by perfumers as a building block for compositions where a almond character is desired. The data below is compiled from public chemical and regulatory sources.
Safety Profile
USE WITH AWARENESS
What Does o,m,p-Tolualdehydes and their mixtures Smell Like?
The odour profile of o,m,p-Tolualdehydes and their mixtures is reported as almond, spicy, sweet, medicinal, phenolic. The dominant facet is its almond 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.
Chemistry & Properties
The Chemistry
o,m,p-Tolualdehydes and their mixtures has the molecular formula C8H8O and a molecular weight of 120.2 g/mol. Its canonical SMILES representation is CC1=CC=CC=C1C=O. Its reported log P (XLogP) of 2.10 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 | 120.2 g/mol |
|---|---|
| Boiling Point | 200.0 °C |
| Melting Point | -35.00 °C |
| Flash Point | 76.60 °C |
| Density | 1.04 g/cm³ |
| Vapor Pressure | 0.2818 mmHg |
| Water Solubility | 0.01358 g/L |
| XLogP | 2.10 |
Perfumer Guide
Alternatives & Comparisons
Ingredients occupying a similar odour space — useful as substitutes or companions when o,m,p-Tolualdehydes and their mixtures is unavailable or restricted.
Shares almond, spicy, sweet character — a candidate substitute or companion in the same odour space.
Shares almond, phenolic, pungent character — a candidate substitute or companion in the same odour space.
Shares phenolic, spicy, green character — a candidate substitute or companion in the same odour space.
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
Referenced in the IFRA 49th Amendment Standards Library; no prohibition recorded. Verify current status before use.
GHS Classification
Signal word: Danger
Open o,m,p-Tolualdehydes and their mixtures in Fragrance Studio (Pro) for the calibrated vapour-pressure curve, the modelled odour-threshold estimate, and the substitute-matching engine across 2,900+ aromachemicals.
References & Sources
- PubChem Compound Summary (NIH) — search by InChIKey
- EPA CompTox Chemicals Dashboard — physicochemical & fate data
- IFRA Standards Library (49th / 51st Amendment)
Data: PubChem (NIH), EPA CompTox, IFRA. Last reviewed: Jun 2026.
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