5-Methoxy-2-methylthiopyrimidine CAS 28340-76-3
| CAS No. | 28340-76-3 |
| Molecular Formula | C6H8N2OS |
| Molecular Weight | 156.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 5-Methoxy-2-methylthiopyrimidine.
CATO supplies 5-Methoxy-2-methylthiopyrimidine (CAS 28340-76-3), a certified reference material (molecular formula C6H8N2OS, MW 156.21 g/mol) for analytical method development and quality control.
The molecular framework of 5-Methoxy-2-methylthiopyrimidine (C6H8N2OS) is characterized by an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C6H8N2OS |
| Molecular Weight | 156.21 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1965 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Methoxy Standards
- 3-Methoxy-4,6-dihydro-2H-thieno[3,4-c]pyrazole (CAS 180791-30-4)
- 3-Methoxy-6-(methylthio)pyridazine (CAS 40953-94-4)
- 4-Methoxy-2-(methylthio)pyrimidine (CAS 76541-59-8)
- 5-Methoxy-2-methylpyrimidine-4-thiol (CAS 83256-74-0)
- 6-Methoxy-3-methylpyrimidine-4(3H)-thione (CAS 89532-57-0)
- 4-methoxy-4-methylcyclohexane-1-carbaldehyde (CAS 1637310-67-8)
- 2-methoxy-6-methylbenzaldehyde (CAS 54884-55-8)
- 3-METHOXY-3-METHYLBENZALDEHYDE 3-METHYL-4-ANISALDEHYDE 3-METHYL-P-ANISALDEHYDE 3-methyl-4-methoxybenzaldehyde 32723-67-4 4-METHOXY-3-METHYLBENZALDEHYDE 4-METHOXY-3-METHYLBENZYLALDEHYDE 4-METHOXY-M-TOLUALDEHYDE AKOS AKM01576 AS02783 ASISCHEM R37628 TIMTEC-BB SBB008533 (CAS 32723-67-4)
Recommended Standards
- 5-Methyl-4-(methylthio)pyrimidin-2-ol (CAS 55040-79-4)
- 5-methanesulfinylpyridin-2-amine (CAS 77619-01-3)
- 5-Methylthiophene-3-carbohydrazide (CAS 524731-02-0)
- 5-Mercapto-1,3-dimethyl-1H-pyrazole-4-carbaldehyde (CAS 787491-83-2)
- (2R,3R)-3-((tert-Butoxycarbonyl)amino)-3-(3,5-dimethoxyphenyl)-2-hydroxypropanoic acid (CAS 1217633-95-8)
- 2,3-Dihydroxy-6-methoxybenzoic acid (CAS 148460-90-6)
- 3-(tert-Butoxycarbonyl)-3-azaspiro[5.5]undecane-9-carboxylic acid (CAS 170228-81-6)
- N-(2-Methyl-4-nitrophenyl)propionamide (CAS 200348-05-6)
- 4-Chloro-2,3-dihydro-1-benzofuran-3-one (CAS 3260-90-0)
- 6-Bromo-8-methoxyimidazo[1,2-a]pyridine-2-carbonitrile (CAS 2791314-61-7)
- 5-Bromo-[1,1'-biphenyl]-3-amine (CAS 136649-27-9)
- Methyl 2-((5-chloro-6-methyl-2-(pyridin-2-yl)pyrimidin-4-yl)thio)acetate (CAS 338779-84-3)
- 4-Bromobenzo[b]thiophene-2-carbohydrazide (CAS 1171927-39-1)
- Insulin Degludec Impurity 19 (CAS CATO-C4X-215719)
Why CATO?
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