2-(2 Hydroxy-5-tert-oxyphenyl) benzotriazole (CAS 3147-75-9) — Citrus N/A Note Fragrance Ingredient

Citrus · Floral

2-(2 Hydroxy-5-tert-oxyphenyl) benzotriazole

CAS 3147-75-9

Origin
synthetic
Note
N/A
IFRA
Professional use
Data as of: Apr 2026

What Is 2-(2 Hydroxy-5-tert-oxyphenyl) benzotriazole?

2-(2 Hydroxy-5-tert-oxyphenyl) benzotriazole is a synthetic chemical primarily used in industrial applications like UV stabilizers for plastics and coatings. Consumers might encounter it in automotive parts, packaging materials, or outdoor furniture. This compound plays a crucial role in extending product lifespans by protecting against sun damage, though it’s not commonly used in personal care or fragrance products due to its industrial nature.

Safety Profile

PROFESSIONAL USE
Generally safeUse with awarenessProfessional use
Industrial use only
Not for direct skin contact
CAS
3147-75-9
Formula
Mixture
MW
Variable
Odor Family
Citrus · Floral
Layer 1 · Enthusiast

What Does 2-(2 Hydroxy-5-tert-oxyphenyl) benzotriazole Smell Like?

This compound is not known for its odor profile as it is primarily used for its UV stabilizing properties rather than in fragrance applications. It lacks the characteristic scent typically associated with fragrance ingredients and is not utilized in perfumery.

Layer 2

2D Molecular Structure

Octrizole

SMILES: CC(C)(C)CC(C)(C)C1=CC(N2N=C3C=CC=CC3=N2)=C(O)C=C1

Chemistry, Properties & Perfumer Guide

The Chemistry

2-(2 Hydroxy-5-tert-oxyphenyl) benzotriazole is a synthetic organic compound belonging to the benzotriazole class, known for its UV-absorbing properties. It is synthesized through the reaction of phenolic compounds with benzotriazole derivatives, forming a structure that effectively absorbs ultraviolet light. The compound is typically used in industrial applications to prevent polymer degradation from UV exposure.

Physical & Chemical Properties

Perfumer Guide

Note Position
N/A
Volatility
N/A
Blending
N/A
ApplicationTypical %RangeNotes
Industrial0.1-1%Up to 2%UV stabilizer in plastics and coatings

Classic Accords

Tip: This ingredient is not suitable for perfumery applications.

Alternatives & Comparisons

Layer 3

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 used in fragrance applications.

GHS Classification

H315 Skin irritation H319 Eye irritation

RIFM Assessment

No RIFM assessment available for this industrial compound.

Sustainability

As a synthetic UV stabilizer, this compound is produced through chemical synthesis with considerations for industrial waste management. Its environmental impact is primarily assessed in terms of its persistence and potential bioaccumulation in industrial settings rather than in consumer products.

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References

    Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.

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    Physicochemical Properties

    DTXSID: DTXSID9027522

    Physical Properties

    Molecular Weight 323.44 g/mol🔬 EPA CompTox
    Density 1.18 g/cm^3🔬 EPA CTX
    Boiling Point 392.981 °C📊 OPERA
    Melting Point 103.675 °C🔬 EPA CTX
    Flash Point 239.831 °C📊 OPERA
    Refractive Index 1.585 Dimensionless📊 OPERA
    Molar Volume 292.855 cm^3/mol📊 OPERA

    Partition & Solubility

    LogP (Octanol-Water) 4.951 Log10 unitless📊 OPERA
    LogD (pH 5.5) 4.95 Log10 unitless📊 OPERA
    LogD (pH 7.4) 4.865 Log10 unitless📊 OPERA
    LogKoa (Octanol-Air) 10.82 Log10 unitless📊 OPERA
    Water Solubility 0 mol/L🔬 EPA CTX
    Henry's Law Constant 0 atm-m3/mole📊 OPERA

    Transport Properties

    Vapor Pressure 0 mmHg🔬 EPA CTX
    Surface Tension 39.388 dyn/cm📊 OPERA

    Molecular Descriptors

    Topological Polar Surface Area 50.94 Ų💻 Computed
    H-Bond Donors 1 count💻 Computed
    H-Bond Acceptors 4 count💻 Computed
    Rotatable Bonds 3 count💻 Computed
    Aromatic Rings 3 count💻 Computed
    Molar Refractivity 98.128 cm^3/mol📊 OPERA
    Polarizability 38.901 Å^3📊 OPERA

    Data Sources:

    🔬 EPA Experimental data from U.S. EPA CompTox Chemicals Dashboard & CTX APIs. 📊 OPERA Predicted using EPA's OPERA QSAR models. 💻 Computed Calculated from SMILES using RDKit.

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