(1S,3S,4R)-Entecavir CAS CATO-C4X-10775
| CAS No. | CATO-C4X-10775 |
| Molecular Formula | C12H15N5O3 |
| Molecular Weight | 277.28 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), (1S,3S,4R)-Entecavir 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.
(1S,3S,4R)-Entecavir (CAS CATO-C4X-10775), molecular formula C12H15N5O3 and molecular weight 277.28 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, (1S,3S,4R)-Entecavir is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 277.28 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C12H15N5O3 |
| Molecular Weight | 277.28 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
Recommended Standards
- Entecavir Impurity 17 (CAS CATO-C4X-107717)
- Entecavir EP Impurity B (CAS 1367369-77-4)
- Entecavir EP Impurity D (CAS 1367369-80-9)
- (1R,3S,4S)-Entecavir (CAS 1367369-81-0)
- n-Butyl-2-(4-oxothieno[3,2-d]pyrimidin-3(4h)-yl)acetamide (CAS 923112-17-8)
- 3,4,5-Tribromothiophene-2-carboxylic acid (CAS 53317-05-8)
- 2-Chloro-4,4,4-trifluoro-1-(4-fluorophenyl)butane-1,3-dione (CAS 886494-03-7)
- n-(3-Fluorobenzyl)-3-methylcyclopentan-1-amine (CAS 1341863-61-3)
- 4-Chloro-6-(3-chlorophenyl)pyrimidine (CAS 881687-44-1)
- N-(3-Amino-4-chlorophenyl)-3-phenylpropanamide (CAS 954583-52-9)
- (S)-N-(Pyrrolidin-2-ylmethyl)acetamide (CAS 345347-89-9)
- 3-Chloro-2-isopropoxypyridine (CAS 282723-22-2)
- (2R,4S)-1-(tert-butoxycarbonyl)-4-mercaptopyrrolidine-2-carboxylic acid (CAS 2231664-43-8)
- Tirzepatide Impurity 43 (CAS CATO-C4X-324043)
Why CATO?
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