[Ethynyl-13C2]-Norethindrone CAS 201741-02-8
| CAS No. | 201741-02-8 |
| Molecular Formula | C18[13C]2H26O2 |
| Molecular Weight | 300.40 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
[Ethynyl-13C2]-Norethindrone (CAS 201741-02-8) is a high-purity analytical reference standard with the molecular formula C18[13C]2H26O2 and a molecular weight of 300.40 g/mol.
Owing to a steroid core, a hydroxyl group, an ether linkage, [Ethynyl-13C2]-Norethindrone is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 300.40 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).
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 | C18[13C]2H26O2 |
| Molecular Weight | 300.40 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2014 |
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Recommended Standards
- Orforglipron Impurity 54 (CAS 210536-89-3)
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- Bixalomer Impurity 1 (CAS 120239-62-5)
- Peptide Impurity 40 (CAS CATO-CPTD788840)
- (5E)-N-[(2,4-Dichlorophenyl)methoxy]-5H-indeno[1,2-b]pyridin-5-imine (CAS 400077-66-9)
- (1E)-N-(Isoquinolin-5-yl)-1-[4-(trifluoromethoxy)phenyl]methanimine (CAS 866150-38-1)
- 4-Nitrocatechol sulfate dipotassium salt (CAS 14528-64-4)
- N-[4-Chloro-5-(cyclopentyloxy)-2-fluorophenyl]carbamic acid (CAS 141772-35-2)
- 2-(Difluoromethoxy)-3-methoxyaniline (CAS 1245771-59-8)
- 4-Methyl-3-(trifluoromethyl)-1h-pyrazole (CAS 153085-14-4)
- 2-(Benzo[d][1,3]dioxol-5-yloxy)nicotinic acid (CAS 214758-41-5)
- (5-Bromo-2-fluorobenzylidene)hydrazine (CAS 710292-26-5)
- trans-4-Bromostilbene (CAS 13041-70-8)
- Semaglutide impurity 44 (CAS CATO-C4X-222644)
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