Thymidine-5- CAS 240407-53-8
| CAS No. | 240407-53-8 |
| Molecular Formula | C9[13C]H14N2O5 |
| Molecular Weight | 243.22 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 Thymidine-5-.
CATO supplies Thymidine-5- (CAS 240407-53-8), a certified reference material (molecular formula C9[13C]H14N2O5, MW 243.22 g/mol) for analytical method development and quality control.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Thymidine-5- is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 243.22 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
As a certified reference material (CRM), Thymidine-5- 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.
Physical & Chemical Properties
| Molecular Formula | C9[13C]H14N2O5 |
| Molecular Weight | 243.22 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 2 |
Related Thymidine Standards
Recommended Standards
- 92663-36-0 Methyl 4-oxo-1,4-dihydropyrimido[1,2-b]indazole-2-carboxylate MFCD26523048 (CAS 92663-36-0)
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- Milrinone Impurity 4 (CAS CATO-C4X-10914)
- Tert-butyl (R)-(4,4,4-trifluoro-1-hydroxybutan-2-yl)carbamate (CAS 207118-12-5)
- Ethyl 5-amino-1-(2-(trifluoromethoxy)phenyl)-1H-pyrazole-3-carboxylate (CAS 1427010-48-7)
- N2,N2-diethyl-5-nitropyrimidine-2,4-diamine (CAS 856973-04-1)
- 4-Cyclopropoxy-3-(dimethylcarbamoyl)picolinic acid (CAS 1243346-36-2)
- [[2-(4-Methyl-1,4-diazepan-1-yl)-2-oxoethyl]-(phenyl)amino]acetic acid (CAS 1142212-05-2)
- 2-Oxo-1-(2-(trifluoromethyl)phenyl)-1,2-dihydropyridine-3-carboxylic acid (CAS 1956319-06-4)
- 2,6-Diisopropylpyrazine (CAS 222048-85-3)
- 2-Biphenyl-4-yl-piperazine (CAS 105242-10-2)
- (2E)-3-(3,4-Dimethoxyphenyl)-2-[4-(4-methoxyphenyl)-1,3-thiazol-2-yl]prop-2-enenitrile (CAS 313687-66-0)
- 6-Methoxy-2-methyl-7-nitro-1,2,3,4-tetrahydroisoquinoline (CAS 1116230-95-5)
- Semaglutide impurity 198 (CAS CATO-C4X-2226198)
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