3-Methylisoxazolo[5,4-d]pyrimidine-4(5H)-thione CAS 130783-68-5
| CAS No. | 130783-68-5 |
| Molecular Formula | C6H5N3OS |
| Molecular Weight | 167.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 3-Methylisoxazolo[5,4-d]pyrimidine-4(5H)-thione meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
CATO supplies 3-Methylisoxazolo[5,4-d]pyrimidine-4(5H)-thione (CAS 130783-68-5), a certified reference material (molecular formula C6H5N3OS, MW 167.19 g/mol) for analytical method development and quality control.
3-Methylisoxazolo[5,4-d]pyrimidine-4(5H)-thione (C6H5N3OS) contains an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, an aromatic ring system. Its physicochemical properties are representative of its class; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Physical & Chemical Properties
| Molecular Formula | C6H5N3OS |
| Molecular Weight | 167.19 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1994 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Methylisoxazolo Standards
- 7-Methylisoxazolo[3,4-d]pyrimidine-4,6(5H,7H)-dione (CAS 65183-63-3)
- 3-Methylisoxazolo[5,4-b]pyridine-4,6-diol (CAS 63523-55-7)
- 5-Ethyl-3-methylisoxazolo[4,5-b]pyridine (CAS 144265-71-4)
- 5-Ethyl-3-methylisoxazolo[5,4-b]pyridine (CAS 71224-70-9)
- 3-methylisoxazolo[5,4-b]pyridine-5-carbaldehyde oxime (CAS 1049874-00-1)
- 3-Methylisoxazolo[3,4-d]pyridazin-7-ol (CAS 526200-64-6)
- 6-Methylisoxazolo[5,4-d]pyrimidin-3-amine (CAS 1171935-86-6)
- 3-Methylisoxazolo[5,4-b]pyridin-4-ol (CAS 1443108-80-2)
Recommended Standards
- 5-Amino-3-(2-thiazolyl)-1H-1,2,4-triazole (CAS 1277174-10-3)
- Methyl 3-(thiazol-2-yl)propiolate (CAS 1315366-12-1)
- 2-Aminothieno[3,2-d]pyrimidin-4(1H)-one (CAS 1203578-74-8)
- 2-Aminothieno[3,4-d]pyrimidin-4(3H)-one (CAS 1333168-07-2)
- 1-(2,3-Dimethoxyphenyl)-2-nitropropene (CAS 719-89-1)
- 2-{[(4-fluorophenyl)carbamoyl]amino}pentanedioic acid (CAS 1396962-47-2)
- tert-Butyl 5-amino-2,3,4,5-tetrahydro-1H-benzo[b]azepine-1-carboxylate (CAS 811841-95-9)
- 2-((2-Imino-5-oxoimidazolidin-4-yl)amino)-2-oxoacetic acid (CAS 858243-02-4)
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- 2-(1-Isopropyl-1h-pyrazol-5-yl)ethan-1-amine (CAS 1328640-64-7)
- 6-bromo-8-chloro-3-methyl-[1,2,4]triazolo[4,3-a]pyrazine (CAS 1610045-39-0)
- 2-Amino-5-benzyl-5,6-dihydro-4h-thieno[2,3-c]pyrrole-3-carbonitrile (CAS 1428233-42-4)
- 4,6-Dimethylisobenzofuran-1,3-dione (CAS 60398-94-9)
- Semaglutide impurity 63 (CAS CATO-C4X-222663)
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