2-Pyrrolidinone, 1-ethenyl-, homopolymer (CAS 9003-39-8) — Citrus None Note Fragrance Ingredient

ByThe Good Scents
Citrus · Floral

2-Pyrrolidinone, 1-ethenyl-, homopolymer

CAS 9003-39-8

Origin
synthetic
Note
None
IFRA
Professional use
Data as of: Apr 2026

What Is 2-Pyrrolidinone, 1-ethenyl-, homopolymer?

1-Ethenyl-2-pyrrolidinone homopolymer is a synthetic polymer used primarily in industrial applications and specialty adhesives. It’s not commonly found in consumer products but may appear in some professional-grade formulations. This ingredient serves as a film-forming agent and viscosity modifier in technical applications where controlled release or adhesion properties are required.

Safety Profile

PROFESSIONAL USE
Generally safeUse with awarenessProfessional use
⚠ Industrial handling precautions required
✗ Not for direct consumer product use
CAS
9003-39-8
Formula
Mixture
MW
Variable
Odor Family
Citrus · Floral
Layer 1 · Enthusiast

What Does 2-Pyrrolidinone, 1-ethenyl-, homopolymer Smell Like?

This synthetic polymer is essentially odorless in its pure form, with no discernible aromatic profile. As a high molecular weight homopolymer, it lacks the volatility required for olfactive detection under normal conditions. In formulations, it contributes no significant odor impact but may slightly modify the release characteristics of other volatile components.

Layer 2

Chemistry, Properties & Perfumer Guide

The Chemistry

1-Ethenyl-2-pyrrolidinone homopolymer is a synthetic polymer derived from the vinylation of 2-pyrrolidinone. The polymerization process typically involves free radical initiation under controlled conditions. The resulting polymer consists of repeating N-vinylpyrrolidone units with molecular weights ranging from thousands to millions of Daltons depending on the degree of polymerization.

Physical & Chemical Properties

Perfumer Guide

Note Position
None
Volatility
Non-volatile
Blending
Technical applications only
ApplicationTypical %RangeNotes
Industrial Coatings5-15%1-30%Film former and viscosity modifier
Adhesives10-20%5-40%Pressure-sensitive formulations

Classic Accords

Tip: This polymer is not used in perfumery for olfactive purposes but may serve technical functions in specialty applications.

Alternatives & Comparisons

1
Polyvinylpyrrolidone CAS 9003-39-8

Similar polymer with wider commercial availability and established safety profile for pharmaceutical applications.

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 as a fragrance ingredient.

RIFM Assessment

Not evaluated by RIFM as it falls outside fragrance material scope.

Sustainability

As a synthetic polymer, this material is derived from petrochemical feedstocks. Production requires significant energy input but offers advantages in controlled release applications that may reduce overall material usage. Proper industrial handling procedures are required to minimize environmental impact during manufacturing.

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References

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

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