4-Amino-6-hydroxy-2-mercaptopyrimidine monohydrate
4-Amino-6-hydroxy-2-mercaptopyrimidine monohydrate (CAS: 65802-56-4) is a hydrated organic compound with the molecular formula C4H5N3OS · H2O and a molecular weight of 161.18. This pyrimidine derivative serves as a valuable intermediate in chemical synthesis. It is commonly employed as a building block in the creation of more complex heterocyclic compounds, finding utility in research and development settings for novel material and pharmaceutical discovery.
- IUPAC
- 6-Amino-2-mercapto-4-pyrimidinol monohydrate,6-Amino-2-thiouracil monohydrate

Chemical Synthesis Intermediate
Utilised as a fundamental building block in organic synthesis for the construction of diverse heterocyclic molecules. Its structure lends itself to various chemical transformations, enabling the creation of novel compounds for research purposes.
Heterocyclic Compound Development
A key component in the synthesis of substituted pyrimidines and related heterocycles. These structures are frequently explored for their potential biological activities and material properties in academic and industrial research.
Research and Development
Supports innovation in chemical research by providing a readily available starting material for exploring new reaction pathways and molecular architectures. Crucial for chemists developing new synthetic methodologies.
| Molecular weight | 161.18 |
|---|---|
| Empirical formula | C4H5N3OS · H2O |
| Assay | 98% |
| Melting point | >300 °C(lit.) |

Hazard statements
- H302Harmful if swallowed
- H319Causes serious eye irritation
Precautionary statements
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-36 |
| 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 4-Amino-6-hydroxy-2-mercaptopyrimidine monohydrate used for?
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This compound is primarily used as an intermediate and building block in chemical synthesis, particularly for the development of heterocyclic compounds and in research and development settings.
What are the CAS number and formula for this chemical?
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The CAS number is 65802-56-4, and the empirical formula is C4H5N3OS · H2O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this chemical with an assay of 98%. We do not represent it as USP, BP, EP, or pharmacopoeia grade.
How should 4-Amino-6-hydroxy-2-mercaptopyrimidine monohydrate be handled?
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This compound is classified as a Warning (GHS07) and is harmful if swallowed (H302) and causes serious eye irritation (H319). Recommended personal protective equipment includes a dust mask type N95 (US), eyeshields, and gloves. Ensure adequate ventilation and avoid dust formation.
Is 4-Amino-6-hydroxy-2-mercaptopyrimidine monohydrate a controlled substance?
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The provided data does not indicate that 4-Amino-6-hydroxy-2-mercaptopyrimidine monohydrate (CAS: 65802-56-4) is a controlled substance.
How is this product shipped and exported?
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Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals. We handle shipping and export logistics in compliance with international regulations.
How can I request a quote or sample?
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To request a quote or sample, please contact our sales department directly through our website or by phone. Our team will be happy to assist you with your requirements.
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