Short answer
Woody notes form the base of a large share of perfumes. The palette has two halves: natural woods — cedarwoods, sandalwood, vetiver, patchouli, guaiacwood, cypress and oud — and woody aroma chemicals, from cedarwood derivatives to modern woody-amber materials such as Iso E Super and other diffusive "ambery woods". Woods give dryness, warmth, structure and persistence. Most are low in volatility and generous in effect, some synthetic woods are extremely powerful, and several have restrictions worth checking. Perfumers usually combine a few, choosing between dry, creamy, smoky and earthy facets.
A map of woody materials
| Facet | Naturals | Aroma chemicals (examples) |
|---|---|---|
| Dry, pencil-shaving | Virginia and Texas cedarwood (junipers); Atlas cedarwood | Cedrol, cedryl acetate, acetyl cedrene |
| Creamy, milky | Sandalwood | Sandalwood-type materials |
| Earthy, rooty, smoky | Vetiver | Vetiveryl acetate (from vetiver) |
| Dark, earthy, camphoraceous | Patchouli | Patchoulol-rich fractions |
| Smoky, tarry | Guaiacwood, cade, birch tar (treated grades) | Smoky phenolic materials |
| Velvety, diffusive, ambery | — | Iso E Super; "ambery woods" |
| Resinous-woody, animalic | Oud (agarwood) | Oud-type accords |
The principal woods each have their own article: sandalwood, vetiver, patchouli, oud and Iso E Super.
Cedarwoods: a note on names
"Cedarwood oil" covers several trees. Virginia and Texas cedarwood come from junipers and smell dry and pencil-like; Atlas cedarwood comes from a true cedar and is sweeter and more balsamic. They are not interchangeable, and they have different CAS numbers and documents. Record the botanical name, as in fragrance material names and CAS numbers.
Synthetic woods
Woody aroma chemicals give consistency, lower cost and effects naturals cannot: the velvety transparency of Iso E Super, the radiant dryness of "ambery woods", clean cedar notes without the oil's variability. Some modern ambery-woody materials are extremely powerful and used at fractions of a percent; others are used at tens of percent. Weigh powerful ones as dilutions, and check each against the current IFRA Standards — several woody materials are restricted.
Smoky woods and tar oils
Smoky facets come from guaiacwood, from tar oils such as cade and birch tar, and from smoky phenolic aroma chemicals. Crude tar oils can contain undesirable compounds, and IFRA Standards set requirements for some of them, so only treated grades meeting those requirements are used. Smoky woods are central to leather accords; see building a leather accord.
Building a woody base
- Choose the dominant facet the brief asks for: dry, creamy, earthy or smoky.
- Combine a natural for complexity with an aroma chemical for structure and consistency.
- Add an ambery or musky partner to extend and soften; see building an amber accord and musks in perfumery.
- Evaluate late: woods reveal themselves in the drydown.
Records
- Botanical name, origin and grade for every wood oil; woods vary strongly by source.
- Dilution and strength notes for powerful synthetic woods.
- Restriction checks for treated tar oils and restricted woody materials.
- Sustainability and trade-control notes where relevant (sandalwood, oud).
Woods are one family in the map in perfume materials by odor family.
A woody study set
A useful way to learn the woods is a single session with eight blotters at 10%: Virginia cedarwood, Atlas cedarwood, a sandalwood material, Haitian vetiver, patchouli, guaiacwood, Iso E Super and a cedarwood derivative such as cedryl acetate. Smell them at once, at two hours and the next day. The first impression separates the woods by facet — dry, sweet, creamy, earthy, smoky, velvety — while the next-day check shows which carry a drydown. Write your own one-line description of each and keep it on the material record. That one session is the basis for choosing woods in every formula afterwards.
Frequently asked questions
Why do some woody perfumes smell of nothing to me?
Some woody-amber materials are ones that a share of people perceive weakly or not at all. Ask others to smell them before raising the dose.
Can I replace sandalwood oil with synthetics?
Many formulas use sandalwood-type aroma chemicals instead of, or alongside, the oil, for cost and supply reasons. The effect is similar but not identical; see sandalwood in perfumery.
Written and reviewed by the RUŌOD Lab team. This article is general education about perfume formulation and record-keeping; it is not legal, regulatory or safety advice, and the examples are illustrations, not validated commercial formulas. How we write and check these guides.