1,3-Benzenediol, 4-(2-phenyldiazenyl)- (CAS 2051-85-6) — Woody Not specified Note Fragrance Ingredient

Woody · Sweet

1,3-Benzenediol, 4-(2-phenyldiazenyl)-

CAS 2051-85-6

Origin
synthetic
Note
Not specified
IFRA
Use with awareness
Data as of: Apr 2026

What Is 1,3-Benzenediol, 4-(2-phenyldiazenyl)-?

1,3-Benzenediol, 4-(2-phenyldiazenyl)- is a synthetic compound used in niche perfumery. It adds unique aromatic characteristics to fragrances. This ingredient is rarely encountered by consumers directly but may be part of complex fragrance compositions. Its distinct molecular structure allows perfumers to create unconventional scent profiles that stand out in modern perfumery.

Safety Profile

USE WITH AWARENESS
Generally safeUse with awarenessProfessional use
Limited safety data available
Use in regulated concentrations
CAS
2051-85-6
Formula
Mixture
MW
Variable
Odor Family
Woody · Sweet
Layer 1 · Enthusiast

What Does 1,3-Benzenediol, 4-(2-phenyldiazenyl)- Smell Like?

This synthetic molecule offers a complex aromatic profile with subtle phenolic undertones. The initial impression is sharp and slightly medicinal, evolving into a more rounded, slightly sweet character. Over time, it develops a faintly woody and resinous dry-down, making it useful for adding depth to modern fragrance compositions.

Scent Profile

In Famous Fragrances

Fragrance associations may not reflect actual formulations.

Layer 2

Chemistry, Properties & Perfumer Guide

The Chemistry

1,3-Benzenediol, 4-(2-phenyldiazenyl)- is a synthetic aromatic compound belonging to the diazenyl functional group family. Its structure combines phenolic and azo components, which contribute to its unique odor characteristics. The compound is typically synthesized through controlled azo coupling reactions under specific pH conditions to ensure purity and consistency for perfumery applications.

Physical & Chemical Properties

AppearanceNot specified
ColorNot specified

Perfumer Guide

Note Position
Not specified
Volatility
Not specified
Blending
Not specified
ApplicationTypical %RangeNotes
Experimental Fragrances0.1-0.5%Up to 1%Used sparingly for unique effects

Classic Accords

Tip: Use in trace amounts to add unconventional aromatic complexity.

Alternatives & Comparisons

Layer 3

Safety, Regulatory & Sustainability

⚠ Regulatory Disclaimer

General reference only. Consult current IFRA Standards Library before formulating.

IFRA Status

No specific IFRA restrictions found.

RIFM Assessment

No RIFM safety assessment data available.

Sustainability

As a synthetic compound, its environmental impact depends on manufacturing processes. No known natural sources exist.

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References

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

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