5-Methylthiazole
5-Methylthiazole (CAS: 3581-89-3, C4H5NS) is a heterocyclic organic compound with a molecular weight of 99.15 g/mol. It is recognised for its utility as a versatile building block in chemical synthesis. This compound finds application in the creation of more complex molecules, particularly within the fields of pharmaceuticals and material science, owing to its reactive thiazole ring structure. It is supplied by Tech Serve Solutions with an assay of 97%.

Chemical Synthesis Intermediate
5-Methylthiazole serves as a valuable intermediate in the synthesis of complex organic molecules. Its heterocyclic structure makes it a key component in the construction of novel compounds for research and development purposes.
Pharmaceutical Research
This compound is utilised in the pharmaceutical industry for the development of new drug candidates. Its thiazole moiety is present in various biologically active molecules, making it a relevant building block for medicinal chemistry.
Agrochemical Development
5-Methylthiazole can be employed in the research and development of new agrochemical compounds. The thiazole ring system is a structural feature found in certain pesticides and herbicides.
| Molecular weight | 99.15 |
|---|---|
| Empirical formula | C4H5NS |
| Assay | 97% |
| Boiling point | 141-142 °C/745 mmHg(lit.) |
| Density | 1.12 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.528(lit.) |


Hazard statements
- H226Flammable liquid and vapour
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 42 °C / 107.6 °F |
| Transport (UN / ADR) | UN 1993C 3 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 10-36/37/38 |
| Safety statements (S) | 26-36 |
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 5-Methylthiazole used for?
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5-Methylthiazole is primarily used as a versatile building block in chemical synthesis, particularly in the research and development of pharmaceuticals and agrochemicals.
What are the CAS number and molecular formula for 5-Methylthiazole?
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The CAS number for 5-Methylthiazole is 3581-89-3, and its molecular formula is C4H5NS.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 5-Methylthiazole with a minimum assay of 97%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade unless explicitly stated.
How should 5-Methylthiazole be handled safely?
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5-Methylthiazole is a flammable liquid and vapour (H226) and can cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Handle with appropriate personal protective equipment, including safety glasses, chemical-resistant gloves, and ensure adequate ventilation. Refer to the Safety Data Sheet for comprehensive handling guidelines.
How is 5-Methylthiazole packed and shipped?
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5-Methylthiazole is packed according to safety regulations for flammable liquids and is exported globally by Tech Serve Solutions. Please contact us for specific shipping and packaging details.
How can I request a sample or quote for 5-Methylthiazole?
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To request a sample or a quote for 5-Methylthiazole, please use the contact form on our website or contact our sales team directly with your requirements.
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