2-Amino-5-chlorothiazole hydrochloride
2-Amino-5-chlorothiazole hydrochloride (CAS 55506-37-1), with the molecular formula C3H3ClN2S · HCl and a molecular weight of 171.05 g/mol, is a halogenated heterocyclic building block. It serves as a key reactant in the synthesis of various biologically active thiazole derivatives. Available from Tech Serve Solutions with an assay of 95%, it is suitable for chemical synthesis and research applications.
- IUPAC
- (5-Chlorothiazol-2-yl)amine hydrochloride

Synthesis of Thiazole Derivatives
This compound is utilized as a reactant for the preparation of diverse thiazole-based molecules. These derivatives are often explored for their potential biological activities in pharmaceutical research.
Chemical Synthesis Intermediate
As a halogenated heterocyclic building block, 2-Amino-5-chlorothiazole hydrochloride is valuable in organic synthesis. It allows for the introduction of the chlorothiazole moiety into larger molecular structures.
Research and Development
Its specific structure makes it a useful reagent in academic and industrial R&D settings for exploring novel chemical entities and reaction pathways.
| Molecular weight | 171.05 |
|---|---|
| Empirical formula | C3H3ClN2S · HCl |
| Assay | 95% |
| Application | • Reactant for preparation of biologically active thiazole derivatives1 |
| Melting point | 164-167 °C (dec.)(lit.) |


Hazard statements
- H302Harmful if swallowed
- H315Causes skin irritation
- H317May cause an allergic skin reaction
- 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
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-36/37/38 |
| Safety statements (S) | 26-36/37 |
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-Amino-5-chlorothiazole hydrochloride used for?
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2-Amino-5-chlorothiazole hydrochloride is primarily used as a reactant in the preparation of biologically active thiazole derivatives and as a versatile intermediate in chemical synthesis.
What are the CAS number and formula for 2-Amino-5-chlorothiazole hydrochloride?
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The CAS number is 55506-37-1 and the empirical formula is C3H3ClN2S · HCl.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 2-Amino-5-chlorothiazole hydrochloride with an assay of 95%. We do not represent this product as USP, BP, or EP grade.
How should 2-Amino-5-chlorothiazole hydrochloride be handled safely?
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This compound is dangerous. It is harmful if swallowed, causes skin irritation, may cause an allergic skin reaction, causes serious eye damage, and may cause respiratory irritation. Handle with appropriate personal protective equipment including a dust mask (type N95 US), eyeshields, faceshields, and gloves. Ensure adequate ventilation and avoid breathing dust.
Is 2-Amino-5-chlorothiazole hydrochloride available for export?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including 2-Amino-5-chlorothiazole hydrochloride.
How can I request a quote or sample?
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To request a quote or sample of 2-Amino-5-chlorothiazole hydrochloride, please contact our sales team through the website or by phone.
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