Molekula
Pyrrole
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Pyrrole is a heterocyclic aromatic compound used in the synthesis of pharmaceuticals, agrochemicals, and organic electronic materials. It is also used as an intermediate in making dyes and perfume ingredients, and as a cross-linking or curing agent for resins. It is a clear to pale yellow liquid with a strong, unpleasant odor. Available in 100g, 500g, and 1kg packaging, it has a CAS number of 109-97-7, molecular formula C4H5N, and molecular weight of 67.09 g/mol. Store at 2 to 8 °C. Hazardous: signal word Danger. Molekula supplies Pyrrole from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
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.
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100 g — $88.40 per pack
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 | Colourless to brown liquid |
| Water | ≤0.3% |
| Purity (GC) | ≥99% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | 2 to 8 °C |
| Flash Point | 36 °C |
| Transport Class | 3 (6.1) |
| Packing Group | III |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless liquid when fresh |
| Odour | Agreeable empyreumatic odor resembling that of chloroform |
| Melting Point | -23.4 °C |
| Boiling Point | 129.7 °C |
| Solubility (other solvents) | Soluble in alcohol, ether and dilute acids. Also soluble in most organic chemicals |
| Vapour Pressure | 8.35 mmHg at 25 dec C |
| Refractive Index | 1.5085 |
| pKa | pKa = 17.5 |
| log P (octanol/water) | 0.75 |
Source: PubChem CID 8027 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 89967005 |
| CAS Number | 109-97-7 |
| IUPAC Name | 1H-pyrrole |
| EC Number | 203-724-7 |
| Molecular Formula | C4H5N |
| Molecular Weight | 67.09 |
| Exact Mass | 67.0422 |
| SMILES | C1=CNC=C1 |
| InChIKey | KAESVJOAVNADME-UHFFFAOYSA-N |
| InChI | InChI=1S/C4H5N/c1-2-4-5-3-1/h1-5H |
| PubChem CID | 8027 |
| UN Number | UN1992 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2933999701 |
| Tariff Code | 2933998090 |
Safety & GHS
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Flammable
GHS02
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Corrosive
GHS05
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Toxic
GHS06
Hazard statements
- H226 Flammable liquid and vapour
- H301 Toxic if swallowed
- H318 Causes serious eye damage
- H332 Harmful if inhaled
Precautionary statements
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- 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, 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.
Synonyms
- 1-Aza-2,4-cyclopentadiene
- 1H-Pyrrole
- Azole
- Divinyleneimine
- Divinylenimine
- FEMA No. 3386
- Imidole
- Monopyrrole
- Pyrrol
- Pyrroles
Frequently asked questions
What is pyrrole used for?
Pyrrole is primarily used as a building block in the synthesis of pharmaceuticals, agrochemicals, and organic electronic materials such as organic semiconductors.
What is the chemical formula and molecular weight of pyrrole?
The chemical formula of pyrrole is C4H5N, and its molecular weight is 67.09 g/mol.
How should pyrrole be stored?
Pyrrole should be stored at temperatures between 2 to 8 °C and protected from light and moisture.
What grade of pyrrole does Molekula supply?
Molekula supplies pyrrole in technical grade, suitable for research and industrial applications.
Can Molekula supply pyrrole in bulk?
Yes, Molekula can supply pyrrole in bulk quantities; please contact our sales team for pricing and availability.
What documentation comes with a pyrrole order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) compliant with GHS standards.
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.