2,5-Dichloro-3-nitropyridine
2,5-Dichloro-3-nitropyridine (CAS 21427-62-3), with the molecular formula C5H2Cl2N2O2 and a molecular weight of 192.99 g/mol, is a halogenated pyridine derivative. This chemical compound serves as a valuable building block in organic synthesis. Its structure, featuring two chlorine atoms and a nitro group on the pyridine ring, allows for diverse chemical transformations, making it a useful intermediate in the development of more complex molecules for various research and industrial applications. It is supplied at 97% purity.
- Synonyms
- C5H2Cl2N2O2

Organic Synthesis Intermediate
This compound is utilised as a key intermediate in multi-step organic syntheses. Its reactive sites enable the introduction of various functionalities onto the pyridine core, facilitating the construction of novel chemical entities.
Heterocyclic Chemistry
As a halogenated heterocycle, 2,5-Dichloro-3-nitropyridine is employed in reactions aimed at modifying or functionalising pyridine rings. This is crucial for developing compounds with specific electronic or structural properties.
Research and Development
It serves as a versatile reagent in research laboratories for exploring new synthetic pathways and developing novel compounds with potential applications in pharmaceuticals or materials science.
| Molecular weight | 192.99 |
|---|---|
| Empirical formula | C5H2Cl2N2O2 |
| Assay | 97% |
| Melting point | 41-45 °C |


Hazard statements
- H301Toxic if swallowed
- H315Causes skin irritation
- H318Causes serious eye damage
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P301IF SWALLOWED
- P305IF IN EYES
| Flash point | >110 °C / >230 °F |
|---|---|
| Transport (UN / ADR) | UN 2811 6.1 / PGIII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | T |
| Risk statements (R) | 25-37/38-41 |
| Safety statements (S) | 26-36/37/39-45 |
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 2,5-Dichloro-3-nitropyridine used for?
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2,5-Dichloro-3-nitropyridine is primarily used as a building block and intermediate in organic synthesis, particularly within heterocyclic and halogenated compound chemistry for research and development purposes.
What is the CAS number and formula for 2,5-Dichloro-3-nitropyridine?
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The CAS number is 21427-62-3, and its empirical formula is C5H2Cl2N2O2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 2,5-Dichloro-3-nitropyridine at an assay of 97%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should 2,5-Dichloro-3-nitropyridine be handled safely?
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2,5-Dichloro-3-nitropyridine is classified as Danger, with hazards including toxicity if swallowed (H301), skin irritation (H315), serious eye damage (H318), and respiratory irritation (H335). Handle with appropriate personal protective equipment (gloves, eye protection, respiratory protection) in a well-ventilated area. Refer to the Safety Data Sheet for comprehensive handling and emergency procedures.
Is 2,5-Dichloro-3-nitropyridine a controlled substance?
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The provided data does not indicate that 2,5-Dichloro-3-nitropyridine is a controlled substance.
How is 2,5-Dichloro-3-nitropyridine packed, shipped, and exported?
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Tech Serve Solutions packs and ships chemicals in compliance with all relevant international regulations for hazardous materials (UN 2811, 6.1/PGIII). We are experienced global exporters.
How can I request a quote or sample for 2,5-Dichloro-3-nitropyridine?
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To request a quote or sample, please contact our sales team via the website or provide your requirements through the product page inquiry form.
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