In short
Acetaldehyde ethyl phenylethyl acetal is an acetal with a fresh green, leafy-floral odour. Acetals like it are used for green effects that are more stable than the aldehydes they resemble.
What Acetaldehyde Ethyl Phenylethyl Acetal smells like
Acetaldehyde ethyl phenylethyl acetal is a green, leafy floral material with a hyacinth character. The Good Scents Company lists leafy, green, nasturtium, fresh, floral and hyacinth, and a green, nasturtium and fruity flavour. Closely related acetals of the same family are described in similar terms — green, leafy and hyacinth — which fits its use as a green floral note. Penta Manufacturing sells it with a hyacinth odour, and MySkinRecipes, as Hyacinth Body, describes a clear, sweet floral fragrance, slightly creamy, like hyacinth, nasturtium and lily of the valley.
- Leading note
- Leafy green
- Clear facets
- Hyacinth
- Supporting facets
- Nasturtium leaf, fresh floral
- Character
- Green, fresh, leafy
What makes Acetaldehyde Ethyl Phenylethyl Acetal distinctive
A crushed-leaf hyacinth note with a nasturtium edge — greener and leafier than the hyacinth aldehydes, which are sharper and more pungent.
How Acetaldehyde Ethyl Phenylethyl Acetal is used
Used for green, leafy floral effects, especially hyacinth and other spring florals.
Typical role: modifier (used in small amounts to change the character of a blend).
How Acetaldehyde Ethyl Phenylethyl Acetal differs from similar materials
- Phenylacetaldehyde Dimethyl Acetal
- Phenylacetaldehyde dimethyl acetal is earthier, with a faint mushroom nuance; the ethyl phenylethyl acetal is leafier, with a nasturtium-leaf freshness.
Each difference compares the published descriptions of the two materials. Smell varies with grade, supplier and dilution; compare them side by side on blotters before substituting one for another.
Formulation considerations
Acetals can break down in acidic bases, releasing the parent aldehyde; test in the final product.
Identity and classification
- Type
- Aroma chemical
- Origin
- Synthetic
- Odour family
- Green / Floral
- Note position
- Top to heart note
- Physical form at room temperature
- Liquid
- Also known as
- 1-(1-Ethoxyethoxy)-2-phenylethane
- CAS number
- 2556-10-7
- Molecular formula
- C12H18O2
- Molecular weight
- 194.27 g/mol
- IUPAC name
- 2-(1-ethoxyethoxy)ethylbenzene
The CAS number, formula and molecular weight are taken from PubChem compound 102849, whose own record lists this CAS number; checked 19 October 2026.
Safety and compliance
Hazard classification of the neat substance, as PubChem summarises it, read 26 October 2026. Companies notifying the ECHA C&L Inventory report it as not meeting the GHS hazard criteria (1,522 of 1,565 reports). Unless it is harmonised, this is the notifiers' own classification, not a binding one.
This page is general information, not a safety assessment or a specification. Confirm identity, composition, IFRA status and allergen content from your supplier's documents for the lot you hold.
Materials it works with
-
Phenylethyl Alcohol
Aroma chemical · Floral / Green — rose, honeyed, soft, floral
-
Phenylacetaldehyde Dimethyl Acetal
Aroma chemical · Green / Floral — green, hyacinth, earthy, floral
-
cis-3-Hexenol
Aroma chemical · Green / Fruity — green, cut grass, leafy, fresh
-
Galbanum Oil
Essential oil · Green / Resinous — green, sharp, bitter, resinous
Used in formulas and accords
Used in 3 published formulas
Acetaldehyde Ethyl Phenylethyl Acetal is an ingredient in 2 perfume formulas and 1 accord in the Formula & Accord Library.
Community formulas
RUŌOD House Originals
Original compositions by RUŌOD House.
Further reading
Questions about Acetaldehyde Ethyl Phenylethyl Acetal
Is Acetaldehyde Ethyl Phenylethyl Acetal natural or synthetic?
Acetaldehyde Ethyl Phenylethyl Acetal is synthetic — it is made by chemical synthesis.
What is the CAS number of Acetaldehyde Ethyl Phenylethyl Acetal?
2556-10-7. It was checked against PubChem on 19 October 2026.
Which published formulas use Acetaldehyde Ethyl Phenylethyl Acetal?
Acetaldehyde Ethyl Phenylethyl Acetal is used in 3 published formulas in the RUŌOD Lab Formula & Accord Library: Cut Stem Atelier, Galbanum Courtyard and Hyacinth Accord. Each is listed with a link under "Used in formulas and accords" on this page.
Sources
- PubChem — compound 102849, checked 19 October 2026.
- PubChem — GHS classification (the ECHA C&L Inventory notifications and any harmonised EU entry), read 26 October 2026.
- The Good Scents Company — acetaldehyde ethyl phenethyl acetal — odour database.
- Penta Manufacturing — Acetaldehyde ethyl phenyl ethyl acetal (Knowde) — manufacturer's description.
- MySkinRecipes — Acetaldehyde ethyl phenethyl acetal (Hyacinth Body) — distributor's description.
- Olfactory profile: the RUŌOD Lab team's synthesis of the published descriptions above, reviewed 26 October 2026. Evidence: more than one published description. Classification and the short description: revision 1. Descriptions of odour are judgement, not measurement.