2-Chloro-3-hydrazinopyrazine
2-Chloro-3-hydrazinopyrazine (CAS 63286-28-2) is a heterocyclic organic compound with the molecular formula C4H5ClN4 and a molecular weight of 144.56 g/mol. This pyrazine derivative is primarily utilised as a building block in chemical synthesis, particularly within the realm of heterocyclic chemistry. Its structure lends itself to further functionalisation for the development of more complex molecules.
- IUPAC
- 3-Chloro-2(H)-pyrazinone hydrazone
- Synonyms
- 3-Chloro-2(H)-pyrazinone hydrazone

Heterocyclic Synthesis
Serves as a key intermediate in the construction of diverse heterocyclic ring systems. Its reactive hydrazino and chloro functionalities enable a range of chemical transformations.
Pharmaceutical Intermediate
A valuable building block for the synthesis of active pharmaceutical ingredients (APIs) and drug discovery programmes. Its pyrazine core is present in various biologically active compounds.
Organic Synthesis Research
Utilised in academic and industrial research laboratories for exploring novel synthetic routes and creating novel chemical entities.
| Molecular weight | 144.56 |
|---|---|
| Empirical formula | C4H5ClN4 |
| Assay | 95% |
| Melting point | 154-159 °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
| Transport (UN / ADR) | UN 2811 6.1 / PGIII |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-37/38-41 |
| Safety statements (S) | 26-39 |
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-Chloro-3-hydrazinopyrazine used for?
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2-Chloro-3-hydrazinopyrazine (CAS 63286-28-2) is primarily used as a building block in chemical synthesis, particularly for creating heterocyclic compounds and as an intermediate in pharmaceutical research.
What are the CAS number and formula for 2-Chloro-3-hydrazinopyrazine?
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The CAS number for 2-Chloro-3-hydrazinopyrazine is 63286-28-2 and its molecular formula is C4H5ClN4.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 2-Chloro-3-hydrazinopyrazine with a minimum assay of 95%. This product is not represented as USP, BP, EP or pharmaceutical grade.
How should 2-Chloro-3-hydrazinopyrazine be handled safely?
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2-Chloro-3-hydrazinopyrazine is classified as Dangerous. It is harmful if swallowed, causes skin irritation, serious eye damage, and may cause respiratory irritation. Handle with appropriate personal protective equipment, including gloves, eye protection, and ensure adequate ventilation. Refer to the Safety Data Sheet for full details.
Is 2-Chloro-3-hydrazinopyrazine a controlled substance?
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The provided data does not indicate that 2-Chloro-3-hydrazinopyrazine is a controlled substance.
How is 2-Chloro-3-hydrazinopyrazine packed and exported?
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2-Chloro-3-hydrazinopyrazine is shipped as UN 2811, Class 6.1, Packing Group III, with appropriate hazard labelling, adhering to international regulations for the export of hazardous chemicals.
How can I request a sample or quote for 2-Chloro-3-hydrazinopyrazine?
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To request a sample or quote for 2-Chloro-3-hydrazinopyrazine, please contact the Tech Serve Solutions sales team via our website or by phone.
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