Ethyl N,S-bis(4-oxo-4-(2,6,6-trimethylcyclohex-3-en-1-yl)butan-2-yl)cysteinate (CAS 2173997-41-4) — Musky Base Note Fragrance Ingredient

Musky · Woody

Ethyl N,S-bis(4-oxo-4-(2,6,6-trimethylcyclohex-3-en-1-yl)butan-2-yl)cysteinate

CAS 2173997-41-4

Origin
synthetic
Note
Base
IFRA
Professional use
Data as of: Apr 2026

What Is Ethyl N,S-bis(4-oxo-4-(2,6,6-trimethylcyclohex-3-en-1-yl)butan-2-yl)cysteinate?

Ethyl N,S-bis(4-oxo-4-(2,6,6-trimethylcyclohex-3-en-1-yl)butan-2-yl)cysteinate is a highly specialized synthetic fragrance ingredient developed for advanced perfumery applications. It’s found exclusively in select niche and experimental fragrances. This molecule represents cutting-edge perfumery chemistry, offering unique olfactory properties that can’t be replicated with traditional ingredients.

Safety Profile

PROFESSIONAL USE
Generally safeUse with awarenessProfessional use
Limited safety data available
Restricted to professional perfumers
CAS
2173997-41-4
Formula
Mixture
MW
Variable
Odor Family
Musky · Woody
Layer 1 · Enthusiast

What Does Ethyl N,S-bis(4-oxo-4-(2,6,6-trimethylcyclohex-3-en-1-yl)butan-2-yl)cysteinate Smell Like?

This synthetic molecule presents a complex olfactory profile that evolves dramatically. Initial impressions suggest a dense, resinous character with woody-amber undertones, gradually revealing a sophisticated leathery nuance. The dry-down exhibits remarkable tenacity, leaving a warm, animalic trace that interacts dynamically with skin chemistry.

Scent Profile
Layer 2

Chemistry, Properties & Perfumer Guide

The Chemistry

As a synthetic cysteine derivative, this molecule incorporates multiple ketone and ester functional groups attached to a modified cyclohexene core. The structure suggests potential chiral centers that could create distinct enantiomeric odor profiles. Its synthesis likely involves multi-step organic transformations including esterification and ketone formation, though specific industrial routes remain proprietary.

Physical & Chemical Properties

AppearanceNot documented
Molecular WeightNot calculated
XLogPNot calculated

Perfumer Guide

Note Position
Base
Volatility
Very low (>12 hours)
Blending
Specialized
ApplicationTypical %RangeNotes
Experimental Fragrances0.1-0.5%Up to 1%Extreme potency requires careful dosing

Classic Accords

Tip: Always conduct extensive dilution trials before incorporating into final formulations.

Alternatives & Comparisons

Layer 3

Safety, Regulatory & Sustainability

⚠ Regulatory Disclaimer

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

IFRA Status

Not currently evaluated by IFRA due to novelty.

RIFM Assessment

No RIFM assessment available for this novel compound.

Sustainability

As a synthetic molecule with no natural counterpart, its environmental impact depends entirely on production methods. The multi-step synthesis likely requires significant energy input and specialized reagents, though exact life cycle data remains undisclosed by manufacturers.

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References

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

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