2-Methoxy-17β-estradiol-1,4,16,16,17-d5 CAS 358731-34-7
| CAS No. | 358731-34-7 |
| Molecular Formula | - |
| Molecular Weight | 307.44 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.
2-Methoxy-17β-estradiol-1,4,16,16,17-d5 (CAS 358731-34-7), molecular formula C19H21D5O3 and molecular weight 307.44 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 2-Methoxy-17β-estradiol-1,4,16,16,17-d5 (C19H21D5O3) contains deuterium isotope labeling, a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.5, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 307.44 g/mol, it falls into the moderately-high-molecular-weight range. 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 | C19H21D5O3 |
| Molecular Weight | 307.44 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 chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 9.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
Related Methoxy Standards
- 5-Methoxy-N-(3-morpholinopropyl)benzo[d]thiazol-2-amine (CAS 1105188-59-7)
- 6-Methoxy-N-(3-morpholinopropyl)benzo[d]thiazol-2-amine (CAS 1105188-66-6)
- Ethyl 3-methoxy-4-((1-methylpiperidin-4-yl)methoxy)benzoate (CAS 264208-60-8)
- 3-(3-Methoxy-1-methyl-1H-pyrazol-4-yl)-4-(2-methoxyethyl)-5-(prop-2-yn-1-ylthio)-4H-1,2,4-triazole (CAS 1014095-86-3)
- 2-Methoxy-6-(((4-(methylsulfonyl)phenyl)amino)methyl)phenol (CAS 1041559-71-0)
- 4-Methoxy-N-(4-methoxybenzyl)benzenesulfonamide (CAS 122134-66-1)
- 3-Methoxy-4-((4-(methylsulfonyl)benzyl)oxy)aniline (CAS 15382-83-9)
- 2-(8-Methoxy-4,4,6-trimethyl-2-oxo-5,6-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1(2H)-ylidene)malononitrile (CAS 1256628-08-6)
Recommended Standards
- 2-Chloro-4-iodo-6-(trifluoromethyl)pyridine (CAS 205444-22-0)
- 3-Chloro-2-iodo-6-(trifluoromethyl)pyridine (CAS 823221-96-1)
- 2-Chloro-4-iodo-5-(trifluoromethyl)pyridine (CAS 505084-55-9)
- 3-Chloro-4-iodo-2-(trifluoromethyl)pyridine (CAS 749875-03-4)
- 5-Bromoquinolin-3-ol (CAS 1261733-77-0)
- 3-Bromo-6-fluoropyridine-2-sulfonyl chloride (CAS 1261485-23-7)
- 5-(((Benzyloxy)carbonyl)amino)nicotinic acid (CAS 1343370-18-2)
- N-isobutyl-5-(o-tolyl)-1,3,4-thiadiazol-2-amine (CAS 917747-93-4)
- 4-Amino-2-oxabicyclo[2.2.2]Octane-1-carboxylic acid (CAS 2167749-17-7)
- {4-[(morpholine-4-sulfonyl)methyl]phenyl}methanamine (CAS 1040344-10-2)
- L-759,656 (CAS 174627-56-6)
- 6-Methyl-4-(4-(trifluoromethyl)phenyl)pyridin-2-ol (CAS 951231-44-0)
- 3-Amino-1-(4-methoxybenzyl)-3-methylpyrrolidin-2-one hydroiodide (CAS 2417778-28-8)
- Tirzepatide Impurity 14 (CAS CATO-C4X-324014)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com