Description
3,4-Dichloropyridine (CAS No. 55934-00-4) is a high-purity heterocyclic organic compound with the molecular formula C5H3Cl2N. This chlorinated pyridine derivative is a versatile building block in pharmaceutical, agrochemical, and material science research. Its rigid pyridine core and reactive chlorine substituents make it an ideal intermediate for nucleophilic substitution reactions, cross-coupling reactions, and metal-catalyzed transformations.
Our product is synthesized under strict quality control measures, ensuring ≥98% purity (GC) with trace moisture and residual solvent levels meeting industry standards. Available in amber glass bottles or bulk packaging under inert atmosphere to prevent degradation. Suitable for use in medicinal chemistry (e.g., kinase inhibitor development), ligand synthesis, and as a precursor for advanced materials.
Key Specifications:
– Molecular Weight: 147.99 g/mol
– Melting Point: 35-38°C
– Boiling Point: 205-207°C
– Density: 1.407 g/cm3
– Storage: 2-8°C under nitrogen
– Hazard Codes: Xi (Irritant)
Properties
- CAS Number: 55934-00-4
- Complexity: 76.8
- IUPAC Name: 3,4-dichloropyridine
- InChI: InChI=1S/C5H3Cl2N/c6-4-1-2-8-3-5(4)7/h1-3H
- InChI Key: ZMPYQKNNUHPTLT-UHFFFAOYSA-N
- Exact Mass: 146.9642545
- Molecular Formula: C5H3Cl2N
- Molecular Weight: 147.99
- SMILES: C1=CN=CC(=C1Cl)Cl
- Topological: 12.9
- Monoisotopic Mass: 146.9642545
- Synonyms: 3,4-Dichloropyridine, 55934-00-4, DTXSID30371114, DTXCID50322148, 802-270-2, zmpyqknnuhptlt-uhfffaoysa-n, MFCD01861989, Pyridine, 3,4-dichloro-, 3,4,dichloropyridine, SCHEMBL405529, SCHEMBL952595, SCHEMBL1483316, SCHEMBL6743162, SBB054368, AKOS005257645, CS-W004811, PS-6123, SY010516, DB-024135, EN300-97312, F0001-1466, Z1575308475
Application
3,4-Dichloropyridine serves as a critical intermediate in the synthesis of biologically active compounds, particularly in the development of herbicides and pharmaceutical agents targeting neurological disorders. Its dichloro-substituted pyridine scaffold is frequently employed in Suzuki-Miyaura cross-coupling reactions to create bipyridine ligands for catalytic systems. Researchers utilize this compound as a precursor for functionalized pyridines through selective displacement of the 4-chloro substituent while preserving the 3-position for further derivatization.
Safety and Hazards
GHS Hazard Statements
- H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]
- H319 (100%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
- H335 (100%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
Precautionary Statements
- P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501
Hazard Classes and Categories
- Skin Irrit. 2 (100%)
- Eye Irrit. 2A (100%)
- STOT SE 3 (100%)
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Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.


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