2,3-Cyclopentenopyridine
2,3-Cyclopentenopyridine (CAS: 533-37-9) is a heterocyclic organic compound with the molecular formula C8H9N and a molecular weight of 119.16 g/mol. It serves as a valuable building block in organic synthesis, particularly in the creation of complex molecules within the pharmaceutical and chemical research sectors. Its specific structure lends itself to further functionalisation for diverse chemical applications.
- IUPAC
- 6,7-Dihydro-5H-cyclopenta[b]pyridine
- Synonyms
- 6,7-Dihydro-5H-cyclopenta[b]pyridine

Chemical Synthesis
Utilised as an intermediate in the synthesis of novel organic compounds. Its pyridine ring and fused cyclopentane ring offer reactive sites for various chemical transformations.
Heterocyclic Chemistry
A key component in the study and development of pyridine derivatives. It is employed in research laboratories exploring new heterocyclic structures and their properties.
Pharmaceutical Intermediates
Serves as a precursor or building block in the multi-step synthesis of potential pharmaceutical agents. Its structure can be incorporated into drug discovery programmes.
| Molecular weight | 119.16 |
|---|---|
| Empirical formula | C8H9N |
| Assay | 98% |
| Boiling point | 87-88 °C/11 mmHg(lit.) |
| Density | 1.018 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.544(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 67 °C / 152.6 °F |
| Transport (UN / ADR) | NA 1993 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 2,3-Cyclopentenopyridine used for?
+
2,3-Cyclopentenopyridine is primarily used as a building block in chemical synthesis, particularly in the development of heterocyclic compounds and potential pharmaceutical intermediates.
What is the CAS number and molecular formula for 2,3-Cyclopentenopyridine?
+
The CAS number for 2,3-Cyclopentenopyridine is 533-37-9, and its molecular formula is C8H9N.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies 2,3-Cyclopentenopyridine with an assay of 98%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
What are the safety concerns when handling 2,3-Cyclopentenopyridine?
+
2,3-Cyclopentenopyridine is classified with GHS07, a Warning signal word, and carries hazard statements H315 (Causes skin irritation), H319 (Causes serious eye irritation), and H335 (May cause respiratory irritation). Appropriate personal protective equipment, including eyeshields, gloves, and suitable respiratory protection, should be used.
How is 2,3-Cyclopentenopyridine shipped and exported by TSS?
+
Tech Serve Solutions is a global supplier and exporter of fine chemicals, including 2,3-Cyclopentenopyridine, adhering to all relevant shipping and export regulations.
How can I request a sample or quote for 2,3-Cyclopentenopyridine?
+
To request a sample or a quote for 2,3-Cyclopentenopyridine, please contact our sales department through the website or by calling our main office.
▶ Related products

1-(2-Fluorobenzyl)piperazine
C11H15FN2
Chemical Synthesis
1-(2-Fluorophenyl)biguanide hydrochloride
Chemical Synthesis

1-(2-Fluorophenyl)cyclopropanecarboxylic acid
C10H9FO2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine
C10H13FN2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine monohydrochloride
C10H13FN2 · HCl
Chemical Synthesis
1-(2-Furoyl)-1H-benzotriazole
C11H7N3O2
Chemical Synthesis
1-(2-Furoyl)piperazine
C9H12N2O2
Chemical Synthesis
1-(2-Hydroxy-5-methylphenyl)-3-phenyl-1,3-propanedione
Chemical Synthesis
▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis