2-Chlorothiazole
2-Chlorothiazole (CAS: 3034-52-4) is a halogenated heterocyclic organic compound with the molecular formula C3H2ClNS and a molecular weight of 119.57 g/mol. It is a valuable building block in organic synthesis, particularly in the development of pharmaceuticals and agrochemicals. This compound's reactivity is leveraged in creating more complex molecular structures, making it a key intermediate for fine chemical applications.

Pharmaceutical Intermediate
2-Chlorothiazole serves as a crucial intermediate in the synthesis of various active pharmaceutical ingredients (APIs). Its heterocyclic structure is incorporated into molecules designed for therapeutic applications, contributing to the development of novel drug candidates.
Agrochemical Synthesis
This compound is employed in the development of agrochemicals, including pesticides and herbicides. The thiazole ring system is often found in biologically active molecules used for crop protection and management.
Organic Synthesis Reagent
As a versatile building block, 2-Chlorothiazole is utilised in general organic synthesis for introducing the thiazole moiety into diverse molecular frameworks. Its halogen substituent allows for various coupling and substitution reactions.
| Molecular weight | 119.57 |
|---|---|
| Empirical formula | C3H2ClNS |
| Assay | 96% |
| Density | 1.393 g/mL at 25 °C |
| Refractive index | n20/D 1.551 |



Hazard statements
- H226Flammable liquid and vapour
- H302Harmful if swallowed
- H318Causes serious eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Flash point | 54 °C / 129.2 °F |
|---|---|
| Transport (UN / ADR) | UN 1993C 3 / PGIII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 10-22-41 |
| 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-Chlorothiazole used for?
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2-Chlorothiazole is primarily used as a building block and intermediate in organic synthesis, particularly for the development of pharmaceuticals and agrochemicals. It is also utilised in fine chemical applications and for chemical research.
What is the CAS number and chemical formula for 2-Chlorothiazole?
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The CAS number for 2-Chlorothiazole is 3034-52-4, and its empirical formula is C3H2ClNS.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 2-Chlorothiazole with a minimum purity of 96%. We do not represent this product as USP, BP, or EP grade, and it is intended for technical and research applications.
How should 2-Chlorothiazole be handled safely?
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2-Chlorothiazole is a flammable liquid and vapour (H226) and is harmful if swallowed (H302), causing serious eye damage (H318). Handle with appropriate personal protective equipment in a well-ventilated area, avoiding ignition sources. Refer to the Safety Data Sheet for comprehensive handling instructions.
Is 2-Chlorothiazole a controlled substance?
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Based on the provided data, 2-Chlorothiazole is not indicated as a controlled substance. However, users should always verify local regulations.
How is 2-Chlorothiazole packed and shipped?
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2-Chlorothiazole is shipped according to UN 1993 regulations for flammable liquids, PGIII. Packaging is designed to ensure safe transport and export compliance. Please contact us for specific packaging details.
How can I request a quote or sample of 2-Chlorothiazole?
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To request a quote or a sample of 2-Chlorothiazole, please contact our sales department through the website or by phone. Our team will be pleased to assist you.
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