| Field | Specification |
|---|---|
| Mfr No | |
| Activity | |
| Cas No. | |
| Molecular Weight | |
| Product Type | |
| Signaling Pathway | |
| SMILES | |
| Target |
Compound Overview
4-Thiouracil (CAS 591-28-6) is a research-grade small molecule supplied by TargetMol.
Physical Properties
| CAS Number | 591-28-6 |
|---|---|
| Molecular Formula | C4H4N2OS |
| Molecular Weight | 128.15 g/mol |
| SMILES | O=c1(nH)ccc(=S)(nH)1 |
| Form | Solid |
| Shipping | Room Temperature (RT) |
Biological Activity
4-Thiouracil is a photoactivatable probe designated for site-specific applications in detecting RNA structures and nucleic acid-nucleic acid contacts. Upon illumination with ultraviolet light exceeding 300 nm and in the presence of oxygen, it serves as an energy donor, facilitating the generation of singlet oxygen through triplet-triplet energy transfer. This process enables the highly reactive oxygen species to interact with 4-thiouracil, leading to the formation of uracil and uracil-6-sulfonate; the latter exhibits fluorescence around a wavelength of approximately 390 nm. Additionally, 4-Thiouracil functions as a substrate for T. gondii uracil phosphoribosyltransferase, allowing the synthesis of 4-thiouridine monophosphate for subsequent integration into RNA.
Safety & Regulatory
For Research Use Only (RUO). Not for therapeutic, diagnostic, or clinical use. Wear appropriate PPE and consult the Safety Data Sheet (SDS) prior to handling.
PEG300 has moderate viscosity, which facilitates the dissolution and administration of drugs, while also providing good tolerability without adverse effects on animals. PEG400 can replace PEG300. PEG600 is not very recommended because its melting point is close to room temperature.
Common solvents include DMSO, water, ethanol, etc. Please select the appropriate solvent according to the solubility reference. If the inhibitor can be dissolved in DMSO, it is recommended to use freshly opened DMSO without moisture absorption. If the inhibitor can be dissolved in water, solvents like sterile water, physiological saline, sterile PBS ahd culture medium are recommended.
Need this compound in a format that drops straight into your assay? We can tailor formulation, chemistry, and documentation so your results stay consistent across runs and re-orders.
- Format options: solid or pre-dissolved solution (choose solvent), target concentration, aliquots, light/moisture-protected packaging
- Chemistry options: free base/acid vs salt forms, hydrate/solvate preference, stereoisomer control (single enantiomer or racemate), close analogs
- Add-on labels & handles: D/¹³C/¹⁵N isotopes (LC-MS/internal standards), azide/alkyne or other functional handles for conjugation
- QC & documentation: standard COA or enhanced analytical pack (HPLC/LC-MS/NMR), chiral purity, residual solvents, water content (KF), method-specific specs
- Scale & continuity: mg to gram scale, bulk pricing, lot reservation, repeat-order continuity
To quote quickly, tell us: compound name + CAS/structure (SMILES or mol file), intended assay context, solvent preference, salt/stereochemistry requirements, purity/QC level, and the amount (mg–g).
Can’t find the compound you’re looking for?
Send the CAS or structure and your specs. We can help source it, suggest close
equivalents, or discuss custom synthesis with the right QC documentation (RUO).
