2-Imidazolidinone (CAS 120-93-4) — Citrus N/A Note Fragrance Ingredient
2-Imidazolidinone
CAS 120-93-4
What Is 2-Imidazolidinone?
2-Imidazolidinone is a synthetic compound primarily used in industrial applications, including textiles and pharmaceuticals. While not commonly found in consumer fragrances, it serves as a building block for more complex fragrance ingredients. Its importance lies in its role as an intermediate in creating other molecules that contribute to scent profiles.
Safety Profile
PROFESSIONAL USEWhat Does 2-Imidazolidinone Smell Like?
2-Imidazolidinone itself is not typically used for its odor, as it lacks a distinctive fragrance profile. Its primary value is as a chemical intermediate in the synthesis of other fragrance ingredients. In pure form, it may have a faint, chemical odor, but this is not relevant for perfumery applications.
Chemistry, Properties & Perfumer Guide
The Chemistry
2-Imidazolidinone is a heterocyclic organic compound with the formula C3H6N2O. It is a cyclic urea derivative, featuring a five-membered ring containing two nitrogen atoms. This structure makes it a versatile intermediate in organic synthesis, particularly for pharmaceuticals and specialty chemicals. It is typically synthesized through the reaction of ethylene diamine with phosgene or its equivalents.
Physical & Chemical Properties
| Melting Point | 130-132 °C |
|---|---|
| Boiling Point | Decomposes |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Industrial | N/A | N/A | Not used in fragrances |
Classic Accords
Tip: This compound is not used directly in perfumery.
Alternatives & Comparisons
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not regulated by IFRA for fragrance use.
GHS Classification
RIFM Assessment
Not assessed by RIFM for fragrance use.
Sustainability
As an industrial chemical, 2-Imidazolidinone is produced synthetically with standard petrochemical feedstocks. Its environmental impact is tied to its production process, which typically involves phosgene or its substitutes. Proper handling and disposal are required to minimize environmental release.
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References
- PubChem Compound Summary for 2-Imidazolidinone PubChem CID: 8476
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
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