4-Amino-2,1,3-benzothiadiazole
4-Amino-2,1,3-benzothiadiazole (CAS 767-64-6) is a heterocyclic organic compound with the molecular formula C6H5N3S and a molecular weight of 151.19 g/mol. It functions as a valuable building block in chemical synthesis, particularly within the realm of heterocyclic chemistry. This compound is primarily utilised in research and development for the creation of novel molecular structures, with documented use in studies involving the synthesis and evaluation of enzyme inhibitors.
- IUPAC
- 4-Aminopiazthiole
- Synonyms
- 767-64-6C6H5N3S4-Aminopiazthiole

Synthesis of Substituted Benzimidazoles
This compound has been employed in the synthesis of various substituted benzimidazoles. These derivatives were investigated for their potential inhibitory activity against enzymes such as rat liver methionine synthase.
Development of Benzothiadiazole Derivatives
4-Amino-2,1,3-benzothiadiazole serves as a core structure for creating novel benzothiadiazole derivatives. Its utility lies in exploring the structure-activity relationships of these heterocyclic compounds in biological and chemical research.
Chemical Synthesis Intermediate
As a heterocyclic building block, it is used in organic synthesis to introduce the benzothiadiazole moiety into more complex molecular architectures. This facilitates the exploration of new chemical entities.
| Molecular weight | 151.19 |
|---|---|
| Empirical formula | C6H5N3S |
| Assay | 98% |
| Application | 4-Amino-2,1,3-benzothiadiazole was used in a study to synthesize and evaluate the inhibitory activity of a series of substituted benzimidazoles and small benzothiadiazoles on rat liver methionine synthase1. |
| Melting point | 67-69 °C(lit.) |

Hazard statements
- H302Harmful if swallowed
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22 |
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 4-Amino-2,1,3-benzothiadiazole used for?
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4-Amino-2,1,3-benzothiadiazole is primarily used as a building block in chemical synthesis and research for developing novel heterocyclic compounds, including substituted benzimidazoles and other benzothiadiazole derivatives.
What is the CAS number and molecular formula for 4-Amino-2,1,3-benzothiadiazole?
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The CAS number is 767-64-6, and the molecular formula is C6H5N3S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Amino-2,1,3-benzothiadiazole with a minimum assay of 98%. We do not represent this product as USP, BP, or EP grade.
How should 4-Amino-2,1,3-benzothiadiazole be handled?
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Handle with appropriate personal protective equipment, including a dust mask (N95 or equivalent), eyeshields, faceshields, and gloves. Avoid dust formation and inhalation, as it is harmful if swallowed (H302).
Does TSS export 4-Amino-2,1,3-benzothiadiazole?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including 4-Amino-2,1,3-benzothiadiazole.
How can I request a sample or quote for 4-Amino-2,1,3-benzothiadiazole?
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Please contact our sales team via the website or by phone to request a sample or a quotation for 4-Amino-2,1,3-benzothiadiazole.
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