Ethyl 4-methyl-1,2,3-thiadiazole-5-carboxylate
Ethyl 4-methyl-1,2,3-thiadiazole-5-carboxylate (CAS: 18212-20-9) is a heterocyclic compound with the molecular formula C6H8N2O2S and a molecular weight of 172.20 g/mol. This chemical serves as a valuable building block in organic synthesis, particularly within the realm of heterocyclic chemistry. Its structure makes it a useful intermediate for the preparation of more complex molecules, contributing to advancements in chemical research and development.
- Synonyms
- 18212-20-9C6H8N2O2S

Organic Synthesis Intermediate
Utilised as a key intermediate in the synthesis of novel organic compounds. Its thiadiazole core offers unique reactivity for constructing diverse molecular architectures.
Heterocyclic Chemistry Research
A versatile building block for researchers exploring new heterocyclic compounds. Enables the development of molecules with potential applications in pharmaceuticals and materials science.
Chemical Reagent
Employed as a reagent in various chemical transformations. Facilitates specific reactions leading to the formation of target molecules with desired properties.
| Molecular weight | 172.20 |
|---|---|
| Empirical formula | C6H8N2O2S |
| Assay | 97% |
| Density | 1.265 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.5050(lit.) |

Hazard statements
- 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, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 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 Ethyl 4-methyl-1,2,3-thiadiazole-5-carboxylate primarily used for?
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Ethyl 4-methyl-1,2,3-thiadiazole-5-carboxylate is primarily used as a building block and intermediate in organic synthesis, particularly within heterocyclic chemistry research.
What is the CAS number and molecular formula for Ethyl 4-methyl-1,2,3-thiadiazole-5-carboxylate?
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The CAS number is 18212-20-9, and the molecular formula is C6H8N2O2S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Ethyl 4-methyl-1,2,3-thiadiazole-5-carboxylate with an assay of 97%. TSS does not represent this product as USP, BP, EP, or other pharmacopoeia grades.
How should Ethyl 4-methyl-1,2,3-thiadiazole-5-carboxylate be handled safely?
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This compound may cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Always wear appropriate personal protective equipment, including eyeshields and gloves, and ensure adequate ventilation. Refer to the Safety Data Sheet for detailed handling instructions.
Is this chemical available for international export?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including Ethyl 4-methyl-1,2,3-thiadiazole-5-carboxylate.
How can I request a sample or quote for this chemical?
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To request a sample or obtain a quote, please contact our sales team through the website or by phone, referencing the product name and CAS number 18212-20-9.
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