3-Amino-4-iodo-1H-pyrazole
3-Amino-4-iodo-1H-pyrazole (CAS 81542-51-0, C3H4IN3) is a heterocyclic organic compound with a molecular weight of 208.99 g/mol. Supplied by Tech Serve Solutions with an assay of 95%, it functions as a valuable building block in chemical synthesis. Its structure, featuring a pyrazole core with amino and iodo substituents, makes it a key intermediate for the development of more complex molecules, particularly within pharmaceutical research and material science applications.
- IUPAC
- 4-Iodo-3-aminopyrazole,4-Iodo-1H-pyrazol-3-amine
- Synonyms
- 4-Iodo-3-aminopyrazole4-Iodo-1H-pyrazol-3-amine

Pharmaceutical Intermediate
Utilised as a precursor in the synthesis of active pharmaceutical ingredients (APIs). The pyrazole ring and reactive iodine atom allow for diverse derivatization pathways in drug discovery programs.
Organic Synthesis Building Block
Serves as a versatile synthon in constructing novel heterocyclic compounds. Its functional groups enable participation in various coupling reactions and amination processes for creating complex molecular architectures.
Research and Development
Employed in academic and industrial research settings for exploring new chemical reactions and developing novel materials. Its unique structure is of interest for probing structure-activity relationships.
| Molecular weight | 208.99 |
|---|---|
| Empirical formula | C3H4IN3 |
| Assay | 95% |
| Melting point | 143-149 °C |

Hazard statements
- H302Harmful if swallowed
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Water hazard class (WGK, DE) | 3 |
|---|---|
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-36/37/38 |
| Safety statements (S) | 26 |
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 3-Amino-4-iodo-1H-pyrazole used for?
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3-Amino-4-iodo-1H-pyrazole is primarily used as a building block in organic synthesis, particularly for the development of pharmaceutical intermediates and novel heterocyclic compounds. It is also employed in research and development settings for exploring new chemical reactions and materials.
What are the CAS number and chemical formula for 3-Amino-4-iodo-1H-pyrazole?
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The CAS number is 81542-51-0, and the chemical formula is C3H4IN3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3-Amino-4-iodo-1H-pyrazole with an assay of 95%. We do not represent this product as USP, EP, BP, or any other pharmacopoeia grade.
What are the safety considerations for handling 3-Amino-4-iodo-1H-pyrazole?
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3-Amino-4-iodo-1H-pyrazole is classified as a Warning substance. It can cause irritation to the skin, eyes, and respiratory tract (H315, H319, H335) and is harmful if swallowed (H302). Always handle with appropriate personal protective equipment in a well-ventilated area, avoiding dust formation. Refer to the Safety Data Sheet for comprehensive handling guidelines.
How is 3-Amino-4-iodo-1H-pyrazole packaged and exported?
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This chemical is carefully packaged to ensure safe transit and is exported globally by Tech Serve Solutions. Specific packaging details are available upon request.
How can I request a quote or sample for 3-Amino-4-iodo-1H-pyrazole?
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To request a quote or sample, please contact our sales team through the website or provide your details via the 'Enquire Now' form, specifying the product CAS number 81542-51-0.
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