What does the restriction note for ETHYL PYRROLIDONE mean?

The restriction field for ETHYL PYRROLIDONE reads: II/1562. This is the restriction note from the CosIng inventory. For authoritative conditions and limits, always refer to the linked annex entries.

What other records share CAS 2687-91-4?

CAS 2687-91-4 may appear across multiple EU annex records. The CAS lookup page shows all Annex II–VI entries sharing this identifier, useful for identifying cross-annex regulatory status of the same chemical substance.

How do I check if my formula contains ETHYL PYRROLIDONE?

Use the INCI Checker to screen a full ingredient list across selected markets, or use the substance market comparison to review this identity across all supported market datasets.

InventoryRef 8247830/07/2020

ETHYL PYRROLIDONE

1-Ethylpyrrolidin-2-one; N-Ethylpyrrolidone

ETHYL PYRROLIDONE is linked to 1 EU annex record on this page. Inventory note: II/1562.

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Regulatory evidence by market

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Market	Evidence status	Records	Source language
European Union	Evidence linked Prohibited entry found Open this evidence	1	English and EU languages
Great Britain	Evidence linked Prohibited Open this evidence	1	English
Canada	Source mapped Official source mapped; ingredient rule not imported	0	English and French
New Zealand	Evidence linked Prohibited Open this evidence	1	English
ASEAN	Evidence linked Prohibited Open this evidence	1	English and national languages
China	Source mapped Official source mapped; ingredient rule not imported	0	Chinese with selected English material
Japan	Source mapped Official source mapped; ingredient rule not imported	0	Japanese; official English translation available
South Korea	Source mapped Official source mapped; ingredient rule not imported	0	Korean with some English names
United States	Source mapped Official source mapped; ingredient rule not imported	0	English
Australia	Source mapped Official source mapped; ingredient rule not imported	0	English
Brazil	Source mapped Official source mapped; ingredient rule not imported	0	Portuguese with INCI crosswalks
India	Evidence linked Prohibited Open this evidence	1	English and Hindi
Saudi Arabia	Evidence linked Prohibited Open this evidence	1	Arabic and English

Chemical identity and properties

PubChem 2D chemical structure for CAS 2687-91-4

CAS 2687-91-4PubChem CID 17595

N-ethyl-2-pyrrolidone

1-Ethyl-2-pyrrolidinone is a N-alkylpyrrolidine. — ChEBI

IUPAC name: 1-ethylpyrrolidin-2-one

Molecular formula: C6H11NO
Molecular weight: 113.16 g/mol
Exact mass: 113.084063974 Da
XLogP3: -0.1
Topological polar surface area: 20.3 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 1
Covalent units: 1
Defined stereocentres: 0

Also known as

1-ETHYL-2-PYRROLIDINONEEthyl pyrrolidoneH0229SX1CWRefChem:596395220-250-61-Ethyl-2-pyrrolidoneN-Ethylpyrrolidone2-Pyrrolidinone, 1-ethyl-

16 more reported names

Pyrrolidinone, 1-ethyl-N-Ethylpyrrolidinonen-ethyl-2-pyrrolidinoneCAS-2687-91-4BRN 0107971EINECS 220-250-6UNII-H0229SX1CWn-ethyl-pyrrolidoneAgsol Ex 2N-Ethyl-2-azapentanoneEthyl-pyrrolidone (NEP)N-ETHYLBUTYROLACTAM1-Ethyl-pyrrolidin-2-oneEC 220-250-65-21-06-00328 (Beilstein Handbook Reference)1-Ethyl-2-pyrrolidone, 98%

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:173690
ChEMBL:CHEMBL12221
EPA DTXSID:DTXSID3044413
PubMed:22449166
PubMed:20161999
PubMed:18779927
PubMed:17687761
PubMed:17370236
PubMed:16863382

Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for ETHYL PYRROLIDONE

INCI name

ETHYL PYRROLIDONE

Description

1-Ethylpyrrolidin-2-one; N-Ethylpyrrolidone

Record provenance

Inventory reference: 82478
Imported identity: ETHYL PYRROLIDONE
Source update: 30/07/2020

European Commission CosIng source notes

Annex records for ETHYL PYRROLIDONE

Annex II Restriction reference

Entry 1562

N-Ethyl-2-pyrrolidone; 1-ethylpyrrolidin-2-one

CAS: 2687-91-4

EC: 220-250-6

Key data

CAS

2687-91-4

220-250-6

Restriction

II/1562

Function

SOLVENT: Dissolving other components of cosmetics. Solvents are usually liquids (aqueous and nonaqueous).

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#10118 · ETHYL PYRROLIDONE

Ingredients with overlapping formulation functions

ETHYL LEVULINATESKIN CONDITIONING - EMOLLIENT; SOLVENT

ETHYL PERFLUOROBUTYL ETHERSOLVENT

ETHYL PERFLUOROISOBUTYL ETHERSOLVENT

ETHYL PG-ACETAL LEVULINATESOLVENT

ETHYLALSOLVENT

ETHYLENE CARBONATESOLVENT

ETHYLHEXYL ACETATEPERFUMING, SOLVENT

ETHYLHEXYL BENZOATESKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SOLVENT

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal

How ETHYL PYRROLIDONE appears in the CosIng inventory

The CosIng inventory lists ETHYL PYRROLIDONE as a cosmetic ingredient and this page links it to 1 annex record. The inventory entry captures names and identifiers, while the annex record shows where the substance is prohibited, restricted or positively listed in EU cosmetics law.

ETHYL PYRROLIDONE is also tagged with 1 cosmetic function in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

ETHYL PYRROLIDONE appears in the EU CosIng inventory and has linked annex records. Check the annex records above for applicable restrictions, concentration limits and conditions of use. Annex II listing means prohibited; Annex III means restricted; Annexes IV, V and VI mean permitted under specified conditions.

The restriction field for ETHYL PYRROLIDONE reads: "II/1562". This is the restriction note recorded in the CosIng inventory for this ingredient. For authoritative conditions and limits, always refer to the linked annex entries above.

According to the EU CosIng inventory, ETHYL PYRROLIDONE carries the following function designation(s):

SOLVENT

CAS 2687-91-4 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

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Source note for ETHYL PYRROLIDONE

This page combines the CosIng inventory entry for ETHYL PYRROLIDONE with 1 linked Annex II–VI record from the local dataset built from public European Commission cosmetic ingredient materials.

Use this inventory page to research ETHYL PYRROLIDONE and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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