4-Hydroxy-2-mercapto-6-methylpyrimidine
4-Hydroxy-2-mercapto-6-methylpyrimidine (CAS: 56-04-2), a heterocyclic organic compound with the formula C5H6N2OS and a molecular weight of 142.18 g/mol, is supplied by TSS as a research-grade chemical. It serves as a valuable building block in chemical synthesis, particularly for the creation of more complex pyrimidine derivatives used in various research and development applications.
- IUPAC
- 4-Hydroxy-2-mercapto 6-methylpyrimidine,6-Methyl-2-thiouracil,MZU
- Synonyms
- 6-Methyl-2-thiouracilMZU

Heterocyclic Synthesis
This compound functions as a key intermediate in the synthesis of diverse heterocyclic structures. Its pyrimidine core allows for further functionalization, making it useful in the development of novel organic molecules.
Organic Chemistry Research
As a versatile building block, 4-Hydroxy-2-mercapto-6-methylpyrimidine is employed in academic and industrial research laboratories for exploring new reaction pathways and creating bespoke chemical entities.
Intermediate for Specialty Chemicals
The molecule's specific arrangement of functional groups makes it a suitable starting material for producing specialised chemicals with potential applications in materials science and chemical research.
| Molecular weight | 142.18 |
|---|---|
| Empirical formula | C5H6N2OS |
| Assay | 95% |
| Melting point | ~330 °C (dec.)(lit.) |


Hazard statements
- H302Harmful if swallowed
- H351Suspected of causing cancer
Precautionary statements
- P281Use personal protective equipment as required
| Protective equipment | Eyeshields, 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 3077 9 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-40 |
| Safety statements (S) | 36/37 |
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-Hydroxy-2-mercapto-6-methylpyrimidine used for?
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4-Hydroxy-2-mercapto-6-methylpyrimidine is used as a building block in chemical synthesis, particularly for the preparation of heterocyclic compounds and in organic chemistry research.
What are the CAS number and formula for 4-Hydroxy-2-mercapto-6-methylpyrimidine?
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The CAS number is 56-04-2, and the empirical formula is C5H6N2OS.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this compound at an assay of 95%. It is considered a research or technical grade chemical and is not represented as USP, BP, or EP.
How should 4-Hydroxy-2-mercapto-6-methylpyrimidine be handled?
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This compound may be harmful if swallowed (H302) and is suspected of causing cancer (H351). Appropriate personal protective equipment, including eyeshields, gloves, and respiratory protection (e.g., N100 or P3 filters), should be used. Handle with caution in a well-ventilated area.
Is this chemical a controlled substance?
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The provided data does not indicate that 4-Hydroxy-2-mercapto-6-methylpyrimidine is a controlled substance.
How is this product shipped and exported?
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Tech Serve Solutions, a global supplier and exporter, can ship and export this chemical. It is classified under UN 3077, Class 9, Packing Group III.
How can I request a quote or sample?
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Please contact our sales team through our website to request a quote or to inquire about obtaining a sample for your research needs.
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