2-(1,1,2,3,3-Pentamethylindan-5-yl)-1-propanol (CAS 1217-08-09) — Musky Base Note Fragrance Ingredient
2-(1,1,2,3,3-Pentamethylindan-5-yl)-1-propanol
CAS 1217-08-09
What Is 2-(1,1,2,3,3-Pentamethylindan-5-yl)-1-propanol?
2-(1,1,2,3,3-Pentamethylindan-5-yl)-1-propanol is a synthetic musk compound used in modern perfumery. It’s found in laundry detergents, fabric softeners, and personal care products where long-lasting fragrance is desired. This ingredient matters because it provides a clean, musky backbone to fragrances, enhancing their longevity without the environmental concerns of some traditional musks.
Safety Profile
USE WITH AWARENESSWhat Does 2-(1,1,2,3,3-Pentamethylindan-5-yl)-1-propanol Smell Like?
This synthetic musk presents as a clean, soft, and slightly powdery odor with subtle woody undertones. Unlike animalic musks, it lacks the heavy sweat nuances, instead offering a laundry-fresh character that evolves into a skin-like warmth during dry-down. The scent profile is linear with excellent tenacity, making it ideal for base note applications where subtle persistence is desired.
Chemistry, Properties & Perfumer Guide
The Chemistry
2-(1,1,2,3,3-Pentamethylindan-5-yl)-1-propanol belongs to the indane musk family, a class of synthetic musks developed as alternatives to nitro musks. Its structure features a pentamethylindane core with a propanol side chain, creating a compact yet voluminous molecule. Synthesis typically involves Friedel-Crafts alkylation of indane derivatives followed by side chain modifications. The multiple methyl groups contribute to its volatility profile and odor characteristics.
Physical & Chemical Properties
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 1-3% | Up to 5% | Base note fixative |
| Laundry Care | 0.5-1.5% | Up to 2% | Fabric substantivity |
| Personal Care | 0.1-0.5% | Up to 1% | Skin-friendly musk |
Classic Accords
Tip: Use as a base note blender to add subtle muskiness without overwhelming other ingredients.
Alternatives & Comparisons
A more potent white musk with higher substantivity, used when stronger musk presence is needed.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not currently restricted by IFRA. Included in 51st Amendment for monitoring.
RIFM Assessment
Under review by RIFM for environmental persistence assessment.
Sustainability
As a synthetic musk, this compound avoids the ethical concerns of animal-derived musks but raises questions about environmental persistence. Manufacturers are developing biodegradable variants while maintaining performance. Current production uses petrochemical feedstocks, though bio-based routes are being explored.
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