1,2-Pentanediol (CAS 5343-92-0) — Citrus N/A Note Fragrance Ingredient
1,_2-_Pentanediol
CAS 5343-92-0
What Is 1,_2-_Pentanediol?
1,2-Pentanediol is a synthetic ingredient primarily used as a solvent or humectant in skincare products and some fragrances. You’ll find it in moisturizers, serums, and sometimes as part of fragrance delivery systems. While not a traditional perfumery ingredient, it plays a supporting role by helping blend other scent components and improving product texture.
Safety Profile
GENERALLY SAFEWhat Does 1,_2-_Pentanediol Smell Like?
1,2-Pentanediol is nearly odorless with just a faint, clean alcohol-like character. Its primary function isn’t olfactory but rather as a workhorse solvent that helps other fragrance ingredients blend smoothly. What subtle scent it does have disappears quickly when diluted, leaving no trace in the dry-down of formulations.
Chemistry, Properties & Perfumer Guide
The Chemistry
1,2-Pentanediol is a simple diol with five carbon atoms and hydroxyl groups at positions 1 and 2. As a synthetic material, it’s produced through controlled oxidation or reduction reactions of pentene derivatives. Its two hydroxyl groups make it water-soluble while the hydrocarbon backbone provides some organic solubility, making it useful as a bridge between polar and non-polar fragrance components.
Physical & Chemical Properties
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Functional Products | 1-5% | Up to 10% | Humectant and solvent |
| Fragrance Bases | 0.5-3% | Up to 5% | Carrier for other ingredients |
Classic Accords
Tip: Use to modify solubility parameters when blending polar and non-polar fragrance materials.
Alternatives & Comparisons
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No IFRA restrictions apply to 1,2-pentanediol.
RIFM Assessment
Considered safe for current fragrance uses by RIFM standards.
Sustainability
As a petrochemical-derived material, 1,2-pentanediol has moderate environmental impact from production. However, its high efficiency means relatively small quantities are needed in formulations. Some bio-based production routes are being explored to improve sustainability.
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