Pyrrole
CAS 109-97-7
EC 203-724-7
Formula C4H5N
MW 67.09 g/mol
Pharmaceutical Intermediates Pharmaceuticals & HealthcareAgriculture & FeedBiotechnology & Life SciencesPlastics & Polymers Polymerization InitiationSolvent & Carrier
Description
Pyrrole (CAS 109-97-7, EC 203-724-7, formula C4H5N) is a nitrogen-containing heterocyclic compound, also known by the common names imidole and Pyrrhol. It carries no assigned E-code and is classified under HS code 29339900. It is commercially referenced under NSC 62777.
In pharmaceutical synthesis, pyrrole serves as a key building block for porphyrin and bile pigment structures, reacting with aldehydes under acid catalysis to form macrocyclic frameworks used in active pharmaceutical ingredient development. In polymer chemistry, it undergoes oxidative polymerization to produce conductive polypyrrole, relevant to specialty plastics and biosensor applications in biotechnology.
Pyrrole is supplied as a liquid-phase product subject to REACH registration requirements for European trade. Procurement teams should confirm supplier compliance documentation and request safety data sheets aligned with current EU GHS standards. Packaging formats and available purity grades should be confirmed directly with the supplier based on application requirements.
In pharmaceutical synthesis, pyrrole serves as a key building block for porphyrin and bile pigment structures, reacting with aldehydes under acid catalysis to form macrocyclic frameworks used in active pharmaceutical ingredient development. In polymer chemistry, it undergoes oxidative polymerization to produce conductive polypyrrole, relevant to specialty plastics and biosensor applications in biotechnology.
Pyrrole is supplied as a liquid-phase product subject to REACH registration requirements for European trade. Procurement teams should confirm supplier compliance documentation and request safety data sheets aligned with current EU GHS standards. Packaging formats and available purity grades should be confirmed directly with the supplier based on application requirements.
Physical Properties
| Melting Point | -23.4 °C |
| Boiling Point | 129.7 °C |
| Density | 0.9698 g/cm³ @ Temp: 20 °C |
| Flash Point | 92 °F |
| Appearance | colourless to brown liquid with chloroform odour |
| Color | Clear almost colorless to brownish |
| Odor | at 0.10 % in propylene glycol. sweet warm nutty ethereal |
| Form | Liquid |
| Water Solubility | 60 g/L (20 ºC) |
| Vapor Pressure | 8.7 hPa (20 °C) |
| Refractive Index | n 20/D 1.508(lit.) |
| pH | >6 (10g/l, H2O, 20℃) |
| Log P | 0.85 |
Safety & Handling (Learn More)
Warning GHS02 GHS07
H
H226H302
P
P210P233P240P241P242P243P264P270P280P330P501P301+P317P370+P378P403+P235P303+P361+P353
Trade & Regulatory
| HS Code | 29339900 |
| UN Number | 1992 |
| ADR Class | 3 |
| Packing Group | III |
| Storage Class | 3 - Flammable liquids |
| WGK (Germany) | 2 |
Other Names
1H-pyrrolePyrrholimidoleAzole
Related Products
Raw Materials
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