Sweet-musky, faintly animal, with a sour-sweaty edge buried under clean laundry. A polycyclic musk that sits quietly at the back of a formula — less saccharine than Galaxolide, less cosmetic than musk ketone, more industrial wallflower than star player.
Sweet-musky with a faint animal edge and a sour-sweaty undertone that surfaces on close inspection. Less saccharine than Galaxolide, less floral-powdery than Tonalide, drier and more neutral than musk ketone. The effect is clean in a functional, detergent-adjacent register — think warm, laundered cotton rather than bare skin. Moderate diffusion; substantivity is high (384 hours at 10% in DPG), but the projection stays close.
Evolution over time
Immediately
Immediately
Clean, sweet-musky opening. Faint sour-animal edge detectable on close sniff. Neutral, laundry-like.
After a few hours
After a few hours
Stable musky heart. The sour-sweaty facet fades, leaving a quiet, warm, clean-musk character. Largely unevolving.
After a few days
After a few days
Persistent base-level musk. Gradual, even fade over several days. High substantivity — detectable on fabric well beyond 24 hours.
The Full Story
CAS 15323-35-0. Molecular formula C₁₇H₂₄O, MW 244.37. Phantolide is 6-acetyl-1,1,2,3,3,5-hexamethylindane (AHMI) — a polycyclic musk of the acetylindane family. It is one of five major polycyclic musks alongside Galaxolide (HHCB), Tonalide (AHTN), Celestolide (ADBI), and Traseolide (ATII). Of these, Galaxolide and Tonalide account for roughly 95% of the European market and 90% of the US market. Phantolide, Celestolide, and Traseolide split the remaining fraction.
The odor is sweet-musky with a faintly animal, slightly sour-sweaty undertone and notable tenacity. It is less sweet than Galaxolide, less floral than Tonalide, less powdery than musk ketone. The character reads as 'clean' in the industrial sense — detergent-adjacent, not skin-adjacent. On blotter it is stable and largely unevolving; there is no real arc. It develops a sour note during prolonged storage in closed containers.
Phantolide melts at approximately 35–58°C, presenting as an off-white crystalline mass at room temperature. It is soluble in ethanol and standard perfumery solvents. Effective musky character appears above 100 ppm, but concentrations beyond 4–5% create imbalance unless supported by materials of comparable evaporation rate. It works with ionones, sandalwood bases, and non-floral high-boiling materials.
Like all polycyclic musks, phantolide is lipophilic (logP ≈ 4.5) and environmentally persistent. It survives conventional wastewater treatment largely intact and has been detected in surface waters, sewage sludge, and aquatic organisms. This environmental profile has driven regulatory pressure and a broader industry shift toward macrocyclic and alicyclic musk alternatives.
Research published in 2017 and 2019 by Kawasaki and colleagues synthesized eight phantolide analogues in both racemic and optically active forms. They found that only the (S)-enantiomers displayed any musk odor — weakly — while the (R)-enantiomers were completely odorless. This enantiomeric divergence demonstrates that polycyclic musk receptors are highly stereoselective, a finding that has implications for designing greener, more potent musk molecules with lower environmental load.
Extraction & Chemistry
Extraction method: Fully synthetic. Produced by Friedel–Crafts acetylation of 1,1,2,3,3,5-hexamethylindane. The hexamethylindane precursor is obtained by reacting para-dimethylstyrene with amylenes (or 2-methyl-2-butanol) in a mixture of acetic acid and concentrated sulfuric acid, yielding a 70:30 mixture with 1,1,3,5-tetramethyl-3-ethylindane. Acetylation with acetyl chloride using a Lewis acid catalyst (typically AlCl₃) gives the final product. Industrial-scale production; no natural source exists.
Base-note fixative and volume builder in functional and fine fragrance. Phantolide provides a neutral musky substrate — useful where the formula needs body and tenacity without imposing a specific musk character. It is less particular than Galaxolide or Tonalide, which makes it effective as a silent structural element: it extends dry-down without redirecting the scent. In fine fragrance, phantolide appears in supporting roles rather than as a signature note. Its blending affinity with ionones and woody-ambery materials suits oriental, chypre, and fougère bases. In functional fragrance (detergents, fabric softeners, household cleaners), it is valued for cost efficiency and performance on fabric. Structure-activity research on phantolide analogues (Kawasaki et al., 2017, 2019) has shown that the (S)-enantiomers carry weak musk character while (R)-enantiomers are odorless — indicating strict stereochemical requirements in polycyclic musk olfaction. This remains an active area of fragrance chemistry.
