Sandalwood in skincare
Sandalwood oil is defined by santalol, and the species on the label decides whether it needs a CITES permit. Chemistry, sourcing and the evidence.
Sandalwood oil is steam distilled from the heartwood of Santalum album, and its identity is chemical: alpha and beta santalol together make up the bulk of a genuine oil. In Ayurveda it is chandana, and which plant that word refers to is a question with legal consequences.
This page describes published research and classical source material. It is not medical advice, and it is not a claim about what any product will do for your skin. WhollyKaw products are cosmetics; these statements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure or prevent any disease.
A note on the evidence. The verified topical literature on this ingredient is thinner than its marketing profile suggests. We would rather say so than pad the page with studies about other organs or other conditions. What follows is what we could verify.
What is santalol?
A sesquiterpene alcohol, and the compound that defines the material rather than merely characterising it. Pharmacopoeial specifications for East Indian sandalwood oil generally require a high combined alpha plus beta santalol content, commonly in the region of 90 per cent, and an oil that misses that threshold is not the same ingredient however it smells.
Alpha santalol is the more abundant of the two and carries most of the characteristic odour. Both are heavy and non-volatile enough that sandalwood is prized in perfumery as a fixative, which is a separate and entirely legitimate reason it turns up in cosmetic formulas that make no botanical claim at all.
Which plant is chandana?
This is the practical question and it does not have one answer.
Chandana, or shweta chandana, normally means white sandalwood, Santalum album, in the Santalaceae. Rakta chandana means red sandalwood, Pterocarpus santalinus, a legume in the Fabaceae. They are not related, they do not smell alike, and red sandalwood is valued for its colour rather than its aroma.
Classical ingredient lists and their modern glosses disagree about which one a given verse means. The Ashtanga Hridayam passage is generally read as white sandalwood, and it lists kaliya and chandana as two separate entries. Published Bhaishajya Ratnavali ingredient lists for kumkumadi taila frequently gloss chandana as Pterocarpus santalinus and kaliyaka as Berberis aristata, which is a different plant again.
Different Ayurvedic houses follow different commentarial traditions and different pharmacopoeial references. See the Ashtanga Hridayam for why translation choices in these texts are not a scholarly nicety.
Why does the species matter legally?
Because one of the two candidates is a CITES listing and the other is not.
| Species | Common name | CITES status |
|---|---|---|
| Santalum album | White or East Indian sandalwood | Not listed on the appendices |
| Pterocarpus santalinus | Red sandalwood, red sanders | Appendix II, annotation #7 |
Annotation #7 lists the categories in scope, which include logs and sawn wood along with powder and extracts, and it then carves finished products back out: products containing such extracts as ingredients, including fragrances, are not treated as covered by it. So the raw material trade is a permit regime and a finished cosmetic on a shelf generally is not. That distinction gets missed in both directions. Annotation texts are amended at Conferences of the Parties, so check the current appendices rather than a secondhand quotation of them, including this one.
Santalum album carries no CITES obligation at all. It does carry its own sourcing paperwork under Indian law, where it was for a long time a state-controlled species and where raw material export remains restricted, but that is documentation rather than a permit regime.
If you are buying or importing. Ask, in writing, which species the chandana in your preparation is. It is one question and the answer determines whether your shipment needs permits. A supplier who cannot answer it precisely has told you something useful about their supply chain.
What does the published research describe?
Little, and we are going to be straightforward about that. The verified topical literature cited below covers sandalwood oil in nanoemulsion formulation, and sandalwood oil constituents examined in cultured skin cell models.
A much larger body of sandalwood research exists in oncology, particularly around alpha santalol in animal tumour models. That work is real and it is not on this page, because citing it here would invite an inference about a cosmetic that no cosmetic is entitled to. If you want it, it is easy to find; we are simply not going to be the ones to put it next to a product.
What remains is a small literature about an ingredient, in cell and formulation models, that says nothing directly about what a finished oil does on a human face.
What is sandalwood actually doing in a formula?
Most often, honestly, it is doing perfumery work. Santalol is an outstanding fixative and the odour profile is one of the most recognisable in the world. A great many products containing sandalwood contain it at fragrance levels for fragrance reasons.
That is not a criticism. It is worth saying because "contains sandalwood" and "contains a meaningful quantity of sandalwood heartwood extract" are very different statements, and the ingredient list rarely distinguishes them.
In the classical kumkumadi taila formula sandalwood sits in the decoction stage, as heartwood, not as an added essential oil at the end. A water decoction of heartwood and a steam distillate of the same wood are chemically different materials. Many modern products use the distillate because it is available and standardised, which is a reasonable substitution but is a substitution.
Is it sustainable?
Historically, no. Wild Santalum album was heavily overexploited across its range, and the species remains restricted in India where harvesting and trade were for decades a government monopoly. Slow growth compounds the problem: heartwood suitable for oil takes fifteen years or more to develop.
Plantation material, from India and increasingly from northern Australia, now makes up a meaningful share of legitimate supply. Australian-grown Santalum album is a distinct and traceable supply chain, as is the related but different Santalum spicatum.
The practical version: a sandalwood ingredient without a traceable origin is a supply chain you do not actually know anything about, in a category with a long history of illegal harvest.
How do you know if sandalwood oil is genuine?
By assay, ultimately. The market is full of substitutes and they are not always labelled as such.
- Australian sandalwood (Santalum spicatum) is a genuine sandalwood with a lower santalol content and a different profile. Legitimate, but not the same ingredient.
- Amyris (Amyris balsamifera), sometimes sold as "West Indian sandalwood", is not a sandalwood at all.
- Synthetic santalol analogues are widely used in perfumery and are often what a "sandalwood" note in a mass-market product actually is.
- Dilution into a cheaper carrier, with the label silent about it.
A gas chromatography report showing combined alpha and beta santalol content is the only real answer. Anyone selling genuine East Indian sandalwood oil at volume will have one.
Is it safe on skin?
Sandalwood oil is a recognised contact allergen for some people, and it appears on standard fragrance allergen screening panels. That does not make it unusual among aromatic botanicals, but it does mean a patch test is worth the two weeks.
Concentration matters more than presence. A trace fragrance level and a formulation built around sandalwood extract are different exposures. If your skin is reactive to fragrance generally, treat any sandalwood-forward product with the caution you would give an essential oil blend.
Why we write these. WhollyKaw makes cosmetics, and we would rather tell you what is actually known about an ingredient, including how little is known, than sell you a sentence we cannot support. If a section here reads as unenthusiastic, that is usually the evidence talking.
Related reading
This page is part of a cluster on the classical kumkumadi formula and the botanicals in it.
Everything described above concerns ingredients, methods and historical texts, not finished products, and it is included as provenance rather than as a promise. This product is a cosmetic. It has not been evaluated by the Food and Drug Administration and is not intended to diagnose, treat, cure or prevent any disease. Speak to a qualified professional about any skin concern.
Frequently asked questions
What is the difference between white and red sandalwood?
They are unrelated plants. White sandalwood is Santalum album, the aromatic heartwood used for oil. Red sandalwood is Pterocarpus santalinus, a legume valued for its colour rather than its scent, and it is a CITES Appendix II species.
Does sandalwood oil need a CITES permit?
Santalum album does not; it is not on the appendices. Pterocarpus santalinus does, under Appendix II annotation 7, which explicitly covers logs, woodchips, powder and extracts.
What is santalol?
The sesquiterpene alcohol that defines sandalwood oil. Alpha and beta santalol together make up the bulk of a genuine East Indian sandalwood oil, commonly around 90 per cent.
Is sandalwood good for skin?
We make no such claim. There is a small verified literature on sandalwood oil in skin cell and formulation studies, cited on this page. It concerns the ingredient, not any finished product.
Is sandalwood oil often adulterated?
Frequently. Australian sandalwood, amyris and synthetic santalol analogues are all sold into the sandalwood market, along with straightforward dilution. A gas chromatography assay for santalol content is the only definitive answer.
Can sandalwood cause irritation?
It is a recognised contact allergen for some people and appears on standard fragrance allergen panels. Patch test, and treat a sandalwood-forward product with more caution than a trace one.
Is sandalwood sustainable?
Wild Santalum album was heavily overexploited and remains restricted in India. Plantation material from India and Australia is now a significant part of legitimate supply. Traceability is the thing to ask about.
Is heartwood extract the same as sandalwood essential oil?
No. A water decoction of heartwood and a steam distillate of the same wood are chemically different materials. The classical formula uses the former; many modern products use the latter.