Javanol™ – The Most Powerful Sandalwood Molecule
Javanol™ by Givaudan – The Complete Reference
For over a century perfumery has been looking for a sandalwood that can be manufactured. Javanol™ is the most recent and the most radical attempt so far: not a reconstruction of the natural material, but a molecule that isolates and amplifies the exact facet that makes sandalwood desirable in the first place. This reference explains what it is chemically, why it smells the way it does, and how to work with it.
Contents
- What is Javanol™?
- The name: Java
- What does it smell like?
- Why a sandalwood molecule smells of rose
- The chemistry: why a three-membered ring
- Role in the formula
- What it is made from
- The race for sandalwood
- Javanol™ and Javanol™ Super
- Javanol™ in a leading role
- Handling: crystallisation and storage
- Quick reference: chemistry and safety
- Further questions
1. What is Javanol™?
Javanol™ (CAS 198404-98-7) is a synthetic cyclopropyl alcohol with the molecular formula C₁₅H₂₆O and a molecular weight of 222.37 g/mol. Its full chemical name is (1-methyl-2-(1,2,2-trimethylbicyclo[3.1.0]hex-3-ylmethyl)cyclopropyl)methanol; commercially it is supplied as a mixture of diastereoisomers.
Two structural features explain almost everything about Javanol™. First, two cyclopropane rings – strained three-membered structures, rare in aroma chemicals, responsible here for the unusually high odour intensity. Second, the complete absence of double bonds. In aroma chemicals, double bonds are the usual weak point: they oxidise, they are attacked by bleach, they yellow. Javanol™ has none – which is why it is stable in almost every application base.
The odour threshold sits at 0.0177 ng/l. That is the lowest figure reported for any sandalwood molecule, and it lies more than twenty times below that of (Z)-(−)-β-santalol – the substance that carries the smell of natural sandalwood oil.
More telling still is the odour value: vapour pressure divided by odour threshold, a measure of how much scent a material actually puts into the air. Despite its low volatility, Javanol™ has the highest value of all sandalwood odorants. That explains the apparent paradox: a heavy base-note material that nevertheless radiates.
2. The name: Java
The name is not a marketing invention but a dedication. Jerzy Bajgrowicz, the chemist who developed the molecule, explained it himself: the name was chosen to evoke the excellent quality of Java's sandalwood oil – which is no longer available to perfumery.
The molecule is therefore named after what it is meant to replace. Anyone who knows the name hears a memory in it.
3. What does it smell like?
Givaudan's official sensory profile lists four descriptors: woody, sandalwood, creamy, rose – plus powerful. That list is unusually precise, because it actually describes two separate layers.
The first is a rich, creamy, milky sandalwood of the β-santalol type – precisely the facet that gives natural Indian sandalwood oil its character. Bajgrowicz describes the profile more closely: near to β-santalol, with a dry woody, slightly vetiver-like nuance and additional floral-rosy and creamy-musky facets.
The second layer is that rosy nuance, which no other sandalwood synthetic possesses in this form. It is what makes Javanol™ unmistakable – and it has a surprising cause, set out in the next section.
Over time the two layers separate: the rose fades first, leaving milky warmth – sandalwood reduced to its core. On a blotter the material remains perceptible for over a month.
A practical note on evaluation: smelling Javanol™ neat from the bottle is misleading. At this threshold the impression is overloaded and the rosy facet is hard to separate from the woody one. A dilution of 1% or below is the sensible approach – only there does it become clear what the material actually does in a formula.
4. Why a sandalwood molecule smells of rose
The rosy facet is neither an impurity nor a side constituent. It arises from the sheer power of the molecule.
Human smell works with around 400 odorant receptors. A scent is not a signal but a code: only a particular combination of firing nerve cells produces a recognisable smell in the brain. No receptor is tuned to exactly one molecule; receptor pockets are broadly tuned and accept a whole family of shapes.
Javanol™ fits exceptionally well into the receptors that code for sandalwood. It fits so well that it saturates them already at low concentration. Once they are saturated, less specific receptors begin to join in – and those code for lactonic notes, rose, lily of the valley and grapefruit.
The rose in Javanol™ is therefore an overflow of the sandalwood channel. This is why the material tips towards rosiness when overdosed: what you hear is no longer the sandalwood, but what resonates alongside it.
In practice: if you do not want the rosy side, dose lower or balance it with lactones, ambers and dry woody materials.
5. The chemistry: why a three-membered ring
Almost all sandalwood-smelling molecules can be broken down into three building blocks:
- a polar hydroxyl group – the osmophore, the part that addresses the receptor
- a spacer – the flexible middle section
- a bulky, lipophilic remainder – the mass of the molecule
This pattern appears in the natural santalols just as it does in every synthetic sandalwood material. Because the overall shape of such a molecule depends above all on the spacer, that part became the focus of the work at Givaudan.
Bajgrowicz replaced the double bond in the spacer with a cyclopropane ring. The three-membered ring retains the electronic properties and rigidity of the double bond while improving hydrophobicity. And it brings a peculiarity: its bonds are curved – chemists call them banana bonds – which makes the electrons, in a sense, step outward.
That matters, because an odorant receptor does not perceive the silhouette of a molecule but its electronic shape. This shape determines which way round the molecule orients itself in the receptor pocket and how firmly it sits there – rather like a magnet having two poles.
A second three-membered ring, this time in the bulky part of the molecule, improved the result once more. The best product of that series was named Javanol™.
What is remarkable: at the time this was a purely research exercise. No industrial cyclopropanation process existed, and developing such structures was considered highly improbable. Only the olfactory result justified developing a large-scale process of double cyclopropanation.
6. Role in the formula
The official use level ranges from traces to 2% in the concentrate. The figure that matters in practice is a different one: below 0.1% Javanol™ already brings richness and creaminess to almost any accord. Givaudan states that the material is roughly eight times more effective in wash tests than the most powerful known competing sandalwood product.
This gives rise to two distinct ways of using it:
- As a sandalwood note – in sandalwood accords, woody bases and reconstructions, typically in the 0.1 to 2% range.
- As a radiant fixative – in traces below 0.1%, where Javanol™ carries musky, floral and spicy accords and gives them volume without becoming recognisable as sandalwood itself.
The second use is often underestimated. A white-floral accord with 0.05% Javanol™ does not smell of sandalwood – it simply smells fuller and lasts longer.
How perfumers work with it
Every piece of sandalwood work starts from one sober fact: the smell of natural sandalwood oil cannot be rendered by a single molecule. It unfolds during evaporation and behaves differently in every application base. So one works with a mixture of several synthetic sandalwood materials, its composition adjusted to the performance required.
Javanol™ serves as the backbone. It is complemented by more diffusive materials from the families around Polysantol and Ebanol™, with which the desired effect can be dialled in.
Three dosage notes from the practice of Givaudan perfumers:
- As little as 0.02% acts as a booster: additional volume and better substantivity for a classically built sandalwood composition.
- In chypres and floral bouquets of a jasmine or rosy type, a very small quantity augments richness and supports both heart and base.
- Added to musk – in parts per ten thousand – it reinforces its warmth and imparts a kind of vibration to the whole composition. In detergents this effect is perceptible on both damp and dry fabric.
Documented synergy
Givaudan lists one official combination: 20% Javanol™ with 80% Nectaryl. The result is described as the impression of a pencil freshly sharpened at school, enriched by surprising inflections of peach and patchouli.
Stability by application base
| Base | pH | Stability |
|---|---|---|
| Fabric conditioner | 3 | very good |
| Antiperspirant | 3.5 | very good |
| Shampoo | 6 | very good |
| All-purpose cleaner | 9 | very good |
| Liquid detergent | 9 | very good |
| Soap | 10 | very good |
| Powder detergent | 10.5 | very good |
| Acid cleaner | 2 | medium |
| Liquid bleach | 11 | not suitable |
The only real limitation is liquid bleach. In every other tested base Javanol™ achieves the top rating – a breadth that is unusual among sandalwood materials.
7. What it is made from
The starting material is α-pinene – a constituent of turpentine obtained from pine trees. The core of the molecule therefore comes from one of the commonest tree species of the northern hemisphere, not from petroleum.
Bajgrowicz puts the thought like this: it is reassuring to see that this common species contributes to protecting an endangered one. What once had to come from Santalum album now comes from pine.
Givaudan accordingly reports over 50% renewable carbon for Javanol™. The same assessment also records that the material is not biodegradable and is toxic to aquatic life – a candour from a manufacturer that is rarely found, and one worth taking seriously in practice (see quick reference).
8. The race for sandalwood
Javanol™ stands at the end of a long line. Knowing that line makes it clear why the molecule looks the way it does.
In the late 1930s a chance finding led to mixtures of terpenylcyclohexanols that smelled of sandalwood. Because of the war they reached the market only in 1960 – as Sandela (Givaudan). The absolute configuration of their main odorant constituents was not published until 1997: the material was sold for decades before it was precisely established what in it actually smells.
1973 brought Osyrol as the next milestone.
The real breakthrough came with the derivatives of α-campholenic aldehyde, patented in East Germany in 1968. The odour description in the patent was misleadingly restrained – "resembling musk and sandalwood" – while the lineage was in fact unambiguously sandalwood. Most of today's common sandalwood materials descend from this family.
That template was then improved step by step: Sandalore™ (Givaudan), Polysantol (Firmenich), Ebanol™ (Givaudan).
Philip Kraft, fragrance chemist at Givaudan, describes the situation of the nineties as a kind of arms race: Givaudan had Sandela, Radjanol and Ebanol, IFF had Bacdanol, Sanjinol and Santaliff, Kao had Santal Mysore Core, Symrise had Brahmanol, Sandel 80 and Sandranol, and Firmenich had a very successful candidate in Polysantol.
In 1996 came Javanol™ – and the race was largely decided. Kraft adds an important qualification: not because the other sandalwoods had been superseded. They had not, and there is ample room for variation. Javanol™ simply fitted the receptors better than anything before it.
The patent was filed in April 1996 and granted in January 1998; the material became available to perfumers from 1997. It was developed by Jerzy Bajgrowicz and Georg Fráter at Givaudan's research laboratories in Switzerland, where it is still manufactured today.
9. Javanol™ and Javanol™ Super
Givaudan lists two qualities under separate codes. Chemically they are the same: same CAS number, same chemical name, in both cases a mixture of diastereoisomers, same physico-chemical values.
The difference lies in the profile. Javanol™ emphasises fresh, rosy-powdery facets. Javanol™ Super emphasises lactonic-cedarwood ones more strongly. A Givaudan perfumer sums it up: Javanol™ when a rosy sandalwood note is needed; Javanol™ Super when a woodier one is expected. Power and richness are comparable in both.
One widely repeated claim is wrong: Javanol™ Super is not an isolated single isomer. The manufacturer explicitly lists it as a mixture of diastereoisomers, under the same CAS number as the standard product.
10. Javanol™ in a leading role
Perfume formulas are trade secrets, which is why most attributions online remain unsupported. One case is documented, however, because there the molecule is the concept.
Molecule 04 and Escentric 04 by Escentric Molecules, composed by Geza Schoen, appeared in April 2017. Molecule 04 is built almost entirely around Javanol™; Escentric 04 places grapefruit, juniper, osmanthus, rose, mastic and labdanum alongside it. Schoen describes the impression as liquid metallic grapefruit peel poured over a bed of velvety cream-coloured roses.
The brand works on the principle of putting individual fragrance molecules centre stage. The first perfume built entirely around a single synthetic substance is generally taken to be Velvione in Helmut Lang Velviona of 2001.
11. Handling: crystallisation and storage
Javanol™ has one peculiarity that irritates many users the first time: it crystallises. Stored cool, the material may turn cloudy or form solid crystals. The manufacturer explicitly points this out and recommends warming the container to around 40 °C and mixing it thoroughly once before use.
This is not a quality defect and affects neither odour nor performance. It is a physical property of the material.
Two practical consequences:
- Warm before weighing. Taking material from a partially crystallised container means taking a fraction – not the material as specified.
- Store warm. Givaudan recommends storage at around 40 °C, dry, well ventilated, protected from light, containers preferably full and hermetically sealed.
Shelf life is 24 months from manufacture.
12. Quick reference: chemistry and safety
| CAS no. | 198404-98-7 |
| EC no. | 427-900-1 |
| FEMA no. | 4776 |
| Molecular formula | C₁₅H₂₆O |
| Molecular weight | 222.37 g/mol |
| Odour threshold | 0.0177 ng/l |
| Density (20 °C) | 0.947 g/cm³ |
| Refractive index (20 °C) | 1.4850–1.4920 |
| Optical rotation | +19.0 to +30.0° |
| Purity | Sum of the two peaks ≥ 85% (ISO 7609) |
| Melting point | < −50 °C |
| Boiling point | 268 °C (1013 hPa) |
| Flash point | 136 °C |
| Auto-ignition | 255 °C |
| Log Pow | 4.5 |
| Water solubility | 3.8 mg/l (20 °C) |
| Viscosity (dyn., 20 °C) | 67.2 mPa·s |
| Starting material | α-pinene (pine turpentine) |
| Country of origin | Switzerland |
Safety: Javanol™ is classified under CLP as hazardous to the aquatic environment – Aquatic Acute 1 (H400) and Aquatic Chronic 1 (H410), signal word "Warning", pictogram GHS09. There are no classifications for human health: no acute toxicity, no skin or eye irritation, no skin or respiratory sensitisation, no mutagenicity, carcinogenicity or reproductive toxicity. Oral and dermal LD50 in the rat are both above 2,000 mg/kg.
Environment: The material is not rapidly degradable. Ecotoxicological values: LC50 fish 1.02 mg/l, EC50 Daphnia magna 0.38 mg/l, EC50 algae (72 h) 0.33 mg/l, chronic NOEC fish 0.055 mg/l. Residues and rinse water must not enter the sewer system.
Transport: UN 3082, class 9, packing group III, marine pollutant.
Frequently asked questions about Javanol™
Why is my Javanol™ cloudy or solid?
Because it crystallises – a known property of the material, not a defect. Warm the container to around 40 °C and mix once; it will be clear again and unchanged in performance.
Why does a sandalwood molecule smell of rose?
Because it saturates the sandalwood receptors already at low concentration. Once these are saturated, less specific receptors join in – among them those coding for rose, lily of the valley, grapefruit and lactonic notes. The rosy facet is thus a consequence of the molecule's power, not an impurity.
What dosage should be used?
Officially traces to 2%. In practice the effect is already clear below 0.1%. Because of the extremely low odour threshold, always prepare a dilution first – 1% or below for initial evaluation.
What is the difference between Javanol™ and Sandalore™?
Power and character. Javanol™ is many times more intense and has a rosy facet that Sandalore™ lacks. Sandalore™ emphasises the warm, sweet side of sandalwood and is used at considerably higher concentrations (0.5–10%). The two are not mutually exclusive; they occupy different facets of the same theme.
What is the difference to Javanol™ Super?
Chemically none – same CAS number, in both cases a mixture of diastereoisomers. In profile, Javanol™ emphasises the rosy-powdery side, Javanol™ Super the lactonic-cedarwood side.
Is Javanol™ a sandalwood substitute?
Not in the sense of a reconstruction. Javanol™ does not replicate natural sandalwood oil; it isolates and amplifies its central creamy-milky facet. Anyone seeking a complete sandalwood impression combines it with further materials.
Is it true that Javanol™ promotes wound healing?
That attribution rests on a mix-up. The well-known study on the odorant receptor OR2AT4 in human skin cells was carried out with Sandalore™, not with Javanol™. No corresponding investigations exist for Javanol™.
In which applications is Javanol™ unsuitable?
Only in liquid bleach (pH 11). In every other tested base – from fabric conditioner through shampoo and soap to powder detergent – it shows very good stability.
Is Javanol™ biodegradable?
No. The material is not rapidly degradable and is toxic to aquatic life (H410). At the same time the manufacturer reports over 50% renewable carbon, since the core of the molecule comes from pine turpentine. When working with it, residues and rinse water should not enter the sewer system.