Thiosemicarbazide
Thiosemicarbazide (CAS: 79-19-6) is a highly pure chemical compound with the linear formula NH₂CSNHNH₂ and a molecular weight of 91.14. This white to off-white crystalline solid serves as a valuable building block in organic synthesis. It is particularly useful in the preparation of heterocyclic compounds and various derivatives. Its primary applications are within chemical synthesis and research laboratories.
- IUPAC
- Thiocarbamoyl hydrazide
- Synonyms
- Thiocarbamoyl hydrazide

Organic Synthesis Intermediate
Thiosemicarbazide is a key intermediate for synthesizing diverse organic molecules, including heterocyclic systems like thiadiazoles and triazoles. It is employed in the creation of more complex chemical structures for various research and development purposes.
Reagent in Chemical Research
Utilised as a reagent in academic and industrial research settings, thiosemicarbazide aids in exploring new reaction pathways and developing novel compounds. Its specific reactivity makes it useful for specialised chemical transformations.
Precursor for Heterocyclic Compounds
This compound is a common precursor for the synthesis of a wide range of sulfur- and nitrogen-containing heterocyclic compounds. These heterocycles often form the core structures of pharmaceuticals and agrochemicals.
| Molecular weight | 91.14 |
|---|---|
| Linear formula | NH2CSNHNH2 |
| Assay | ≥98.0% (RT) |
| Melting point | 180-183 °C (dec.)(lit.) |

Hazard statements
- H300Fatal if swallowed
Precautionary statements
- P264Wash thoroughly after handling
- P301IF SWALLOWED
| Protective equipment | Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 2811 6.1 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T+ |
| Risk statements (R) | 28 |
| Safety statements (S) | 22-26-36/37-45 |
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 Thiosemicarbazide used for?
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Thiosemicarbazide is primarily used as a building block in organic synthesis and as a reagent in chemical research for preparing heterocyclic compounds.
What are the CAS number and formula for Thiosemicarbazide?
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The CAS number for Thiosemicarbazide is 79-19-6, and its linear formula is NH₂CSNHNH₂.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Thiosemicarbazide with an assay of ≥98.0% (RT). We do not represent this product as USP, BP, or EP grade.
How should Thiosemicarbazide be handled safely?
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Thiosemicarbazide is acutely toxic if swallowed (H300) and requires careful handling. Always use appropriate personal protective equipment, including eyeshields, face shields, gloves, and a suitable respirator, in a well-ventilated area. Refer to the Safety Data Sheet for comprehensive handling instructions.
Is Thiosemicarbazide a controlled substance?
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The provided data does not indicate that Thiosemicarbazide is a controlled substance. Please consult relevant local regulations for specific guidance.
How is Thiosemicarbazide packed, shipped, and exported?
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Thiosemicarbazide is packed according to industry standards for hazardous materials, UN 2811 6.1 / PGII. We handle all export documentation and logistics to ensure compliant global distribution.
How can I request a sample or quote for Thiosemicarbazide?
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To request a sample or quote, please use the 'Request a Quote' form on our website or contact our sales team directly with your specific requirements.
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