Sharp lime zest cut with cold metal. The molecule that smells like a freshly ironed white shirt — clean to the point of aggression, the olfactory definition of 'masculine freshness' since the late 1980s.
Immediate impact: a cold, metallic lime — sharper than bergamot, more linear than lemon, without the sweetness of either. There is a lavender-adjacent floralcy buried under the citrus, almost soapy, which is why it reads as 'clean' rather than 'fruity.' A faint green-herbal undertone appears on close inspection, similar to of crushed coriander leaf.
Compared to other citrus synthetics, dihydromyrcenol is drier and more transparent than citral, less ozonic than calone, and far more tenacious than any pressed citrus oil. Its metallic edge is particular — the molecule has an almost mineral quality, like cold tap water on a stainless steel surface.
Evolution over time
Immediately
Immediately
Sharp metallic lime, cold and aggressive — like biting into unripe citrus peel over a stainless steel sink
After a few hours
After a few hours
The metallic edge softens. A lavender-soapy floralcy emerges, transparent and clean. Slight woody-terpenic base appears.
After a few days
After a few days
A faint, clean, barely woody trace. The archetypal smell of a freshly laundered cotton shirt left in a drawer.
The Full Story
Dihydromyrcenol is a tertiary terpene alcohol — colourless, volatile, and arguably the single . Global producti on exceeds 1,000 metric tonnes per year. It smells of lime peel scraped against stainless steel: a bright, almost violent citrus-metallic freshness that the human nose instantly reads as 'clean.' It is the molecule behind laundry detergent, behind glass cleaner, behind every transparent blue-bottled aftershave of the past forty years.
Origin and Synthesis
Dihydromyrcenol barely exists in nature. It is manufactured from beta-pinene, a terpene recovered from sulfate turpentine — itself a waste stream of the paper pulp industry. Beta-pinene undergoes pyrolysis at approximately 400°C to yield myrcene. Selective hydrogenation converts myrcene to dihydromyrcene. The final step — acid-catalysed hydration (Markovnikov addition) — delivers the tertiary alcohol. An alternative industrial route starts from cis-pinane: pyrolysis gives citronellene, which is then converted via hydrochloric acid addition and hydrolysis. Both pathways transform forestry waste into one of perfumery's most ubiquitous building blocks.
Role in contemporary use
The molecule entered perfumery in the early 1970s as a powerful freshness booster. Its defining moment arrived in 1988, when perfumer Pierre Bourdon used an unprecedented concentration — reportedly around 20% — to create the archetype that redefined masculine fragrance. That composition married dihydromyrcenol with lavender and ambroxan, launching the entire aquatic-fougère genre. Since then, dihydromyrcenol has appeared in the majority of commercial masculine launches. At low doses (1–3%) it lifts and aerates; at high doses (10–20%) it dominates with an almost antiseptic brightness.
Chemical Properties
CAS: 18479-58-8. Molecular formula: C₁₀H₂₀O. Molecular weight: 156.27 g/mol. Boiling point: 188–197°C at 760 mmHg. Density: 0.784 g/mL at 25°C. Refractive index: 1.438–1.443 at 20°C. As a tertiary alcohol, it is chemically stable, reasonably substantive for a top note (around 16 hours on a blotter), and compatible with virtually all fragrance families.
Commercial dihydromyrcenol is not a single compound — it is a roughly 50:50 mixture of 2,6-dimethyloct-7-en-2-ol (the free alcohol) and its formate ester (2,6-dimethyloct-7-en-2-yl formate). The ester slowly hydrolyses on skin, releasing the alcohol over time, which contributes to the molecule's surprisingly long tenacity for a top note.
Extraction & Chemistry
Extraction method: Fully synthetic. Industrial synthesis follows the pinene technology tree: beta-pinene (from sulfate turpentine, a paper-industry byproduct) undergoes pyrolysis at ~400°C to yield myrcene, then selective hydrogenation to dihydromyrcene, then acid-catalysed Markovnikov hydration to the tertiary alcohol dihydromyrcenol. An alternative route proceeds via cis-pinane pyrolysis to citronellene, followed by HCl addition and hydrolysis. Global production exceeds 1,000 metric tonnes per year (IFRA 2004 data). The starting material — turpentine — is renewable, making dihydromyrcenol one of the few high-volume fragrance synthetics derived from a bio-based feedstock.
Molecular Formula
C₁₀H₂₀O (2,6-dimethyloct-7-en-2-ol)
CAS Number
18479-58-8
Botanical Name
N/A (synthetic molecule)
IFRA Status
Permitted without restriction by IFRA.
Synonyms
["DHM", "Dihydro Myrcenol"]
Physical Properties
Odor Strength
Medium
Lasting Power
16 hours
Appearance
Colorless clear liquid
Boiling Point
188–197°C at 760 mmHg
Flash Point
76°C (169°F) TCC
Specific Gravity
0.784 at 25°C
Refractive Index
1.438–1.443 at 20°C
In Perfumery
Dihydromyrcenol functions as a top-note signature, a freshness amplifier, and a transparency agent. In fougère compositions, it replaces or augments natural citrus oils, providing a stable, linear freshness that does not oxidise or turn terpenic over time. In aquatic accords, it supplies the 'clean water' quality. In detergent fragrances, it is the primary contribut or to the fresh-laundry smell, used at concentrations up to 20%. The molecule is near-universal in modern masculine compositions. It pairs with lavender and coumar in in neo-fougères, with ambroxan in transparent-woody accords, and with hedione in sheer florals. At low dosage (under 3%), it acts as a lifting agent without imposing its character. Above 10%, it becomes the dominant note. There is no direct natural equivalent — its closest natural relative, myrcenol, is far less stable and less clean in character.
