Benzenepropanoic acid, 3-(2H-benzotriazol-2-yl)-5-(1,1-dimethylethyl)-4-hydroxy-, C7-9-branched and linear alkyl esters (CAS 127519-17-9) — Citrus N/A Note Fragrance Ingredient
Benzenepropanoic acid, 3-(2H-benzotriazol-2-yl)-5-(1,1-dimethylethyl)-4-hydroxy-, C7-9-branched and linear alkyl esters
CAS 127519-17-9
What Is Benzenepropanoic acid, 3-(2H-benzotriazol-2-yl)-5-(1,1-dimethylethyl)-4-hydroxy-, C7-9-branched and linear alkyl esters?
This synthetic compound is primarily used as a UV absorber in plastics, coatings, and sunscreens rather than as a fragrance ingredient. Consumers encounter it in durable outdoor products and sun protection formulations. While not intentionally added for scent, trace amounts may be present in some cosmetic formulations where UV stabilization is required alongside fragrance components.
Safety Profile
USE WITH AWARENESSWhat Does Benzenepropanoic acid, 3-(2H-benzotriazol-2-yl)-5-(1,1-dimethylethyl)-4-hydroxy-, C7-9-branched and linear alkyl esters Smell Like?
This UV absorber is not characterized by any significant odor profile when used at recommended concentrations. At very high concentrations, some users report a faint waxy-chemical odor with no distinct top, middle, or base notes. The material is valued for its photostability rather than olfactory properties in formulations.
Chemistry, Properties & Perfumer Guide
The Chemistry
This benzotriazole derivative functions as a highly effective UV light stabilizer through its ability to absorb UV radiation and dissipate the energy as heat. The molecule features a benzotriazole chromophore connected to a tert-butylphenol group via a propanoic acid linker, with esterified branched alkyl chains that enhance compatibility with polymer matrices. Industrial synthesis typically involves multi-step reactions including esterification of the phenolic hydroxyl group and subsequent coupling with benzotriazole derivatives.
Physical & Chemical Properties
| Appearance | Pale yellow viscous liquid |
|---|---|
| Molecular Weight | Approx. 400-500 g/mol (mixture) |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| UV Protection | 0.5-5% | Up to 10% | Stabilizer in suncare products |
| Plastic Stabilization | 0.1-0.5% | Up to 2% | Polymer additive |
Classic Accords
Tip: Not recommended as a fragrance ingredient – use only for UV stabilization purposes.
Alternatives & Comparisons
UV absorber with better solubility in oil phases for sunscreen formulations.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not regulated by IFRA as it is not a fragrance material.
GHS Classification
RIFM Assessment
Not evaluated by RIFM as it falls outside fragrance material scope.
Sustainability
As a synthetic UV stabilizer, this material is produced through controlled chemical processes with minimal environmental impact during manufacturing. The branched alkyl chains improve biodegradation potential compared to purely linear analogues. Current industry efforts focus on reducing solvent use during production and improving recovery rates from manufacturing waste streams.
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References
- European Chemicals Agency (ECHA) Substance Information ECHA
- Cosmetic Ingredient Review (CIR) Expert Panel CIR
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
Report a data errorIngredient Data Sheet
CAS 127519-17-9Physical data: PubChem (NIH/NLM), U.S. EPA CompTox Dashboard, EPA OPERA models, RDKit. Odor & flavor: Arctander (Perfume & Flavor Chemicals), Fenaroli's Handbook of Flavor Ingredients, Leffingwell. Thresholds: van Gemert (Compilations of Odour Threshold Values). Regulatory: IFRA Standards 51st, FEMA GRAS. Trade names: Surburg (Common Fragrance & Flavor Materials). All data compiled and cross-referenced for perfumertools.com.
