Molekula
2-Pyrrolidinone
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
2-Pyrrolidinone is a heterocyclic organic compound used as a solvent and intermediate in the synthesis of pharmaceuticals and agrochemicals. Industrially, it serves as an intermediate for N-vinyl-2-pyrrolidone and polyvinylpyrrolidone, a monomer for nylon 4, and a high-boiling process solvent and coalescing agent in floor polishes. It is a clear, colorless liquid with a characteristic odor. CAS: 616-45-5, Molecular formula: C4H7NO, Molecular weight: 85.10 g/mol, Storage: Ambient, Signal word: Danger.
Molekula supplies 2-Pyrrolidinone at ≥ 99% purity in 1 kg packs, from £72.84 inc. VAT. It is in stock for same-day dispatch. Every batch ships with a certificate of analysis, and safety data sheets are available in 7 languages. Larger quantities, up to multi-tonne, are quoted on request.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
In stock — same-day dispatch
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
-
1 kg — £60.70 per pack ex VAT · £72.84 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Clear liquid (@ 25 Deg C) light yellow solid under 25 Deg C |
| Colour (Pt-Co) | ≤ 100 |
| Identification | Conforms to reference |
| Purity | ≥ 99% |
| Moisture | ≤ 0.3% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 113 °C |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Light yellow liquid |
| Melting Point | 25 °C |
| Boiling Point | 245 °C |
| Density | 1.1 (relative, water = 1) |
| Vapour Pressure | 9.49 × 10⁻³ mmHg at 25 °C |
| Refractive Index | 1.4806 |
| pKa | pKa = 14.7 |
| log P (octanol/water) | -0.85 |
Source: PubChem CID 12025 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 12474197 |
| CAS Number | 616-45-5 |
| IUPAC Name | pyrrolidin-2-one |
| EC Number | 210-483-1 |
| Molecular Formula | C4H7NO |
| Molecular Weight | 85.10 |
| Exact Mass | 85.0528 |
| SMILES | C1CC(=O)NC1 |
| InChIKey | HNJBEVLQSNELDL-UHFFFAOYSA-N |
| InChI | InChI=1S/C4H7NO/c6-4-2-1-3-5-4/h1-3H2,(H,5,6) |
| PubChem CID | 12025 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2933798500 |
| Tariff Code | 2933790090 |
Safety & GHS
-
Health Hazard
GHS07
-
Serious Health Hazard
GHS08
Hazard statements
- H302 Harmful if swallowed
- H319 Causes serious eye irritation
- H360D May harm the unborn child
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P263 Avoid contact during pregnancy/while nursing
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Russian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- 2-Ketopyrrolidine
- 2-Oxopyrrolidine
- 2-Pyrol
- 2-PYRROLIDONE
- alpha-Pyrrolidinone
- Butyrolactam
- gamma-Butyrolactam
- pyrrolidin-2-one
- Pyrrolidon
- Pyrrolidone
Frequently asked questions
What is 2-Pyrrolidinone used for?
2-Pyrrolidinone is primarily used as a solvent in organic synthesis and as an intermediate in the production of pharmaceuticals and polymers.
What is the chemical formula and molecular weight of 2-Pyrrolidinone?
The chemical formula is C4H7NO and the molecular weight is 85.10 g/mol.
How should 2-Pyrrolidinone be stored?
It should be stored at ambient temperature, away from moisture and incompatible materials.
What grade of 2-Pyrrolidinone does Molekula supply?
Molekula supplies 2-Pyrrolidinone with a purity of at least 99%, colour of no more than 100 Pt-Co and moisture of no more than 0.3%; custom grades are available upon request.
Can Molekula supply 2-Pyrrolidinone in bulk?
Yes, Molekula can supply 2-Pyrrolidinone in bulk quantities; please contact our sales team for pricing and availability.
What documentation comes with a purchase of 2-Pyrrolidinone?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS); additional documentation is available upon request.
Where can I buy 2-Pyrrolidinone?
Directly from Molekula, which lists 2-Pyrrolidinone in 1 kg packs from £72.84 inc. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.