Progesterone Impurity 37 CAS 3962-66-1
| CAS No. | 3962-66-1 |
| Molecular Formula | C18H24O2 |
| Molecular Weight | 272.38 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
CATO supplies Progesterone Impurity 37 (CAS 3962-66-1), a pharmacopoeial impurity reference standard (molecular formula C18H24O2, MW 272.38 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C18H24O2, Progesterone Impurity 37 contains a steroid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 272.38 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO manufactures Progesterone Impurity 37 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C18H24O2 |
| Molecular Weight | 272.38 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.) | 1958 |
Related Progesterone Standards
- Progesterone Impurity 38 (CAS 19289-77-1)
- Progesterone Impurity 39 (CAS 2645-92-3)
- Progesterone Impurity 72 (CAS 93519-10-9)
- Progesterone Impurity 73 (CAS 1229-18-1)
- Progesterone Impurity 74 (CAS 96893-14-0)
- Progesterone Impurity 75 (CAS 796-24-7)
- Progesterone Impurity N47 (CAS 82182-55-6)
- Progesterone Impurity 76 (CAS CATO-C4X-150276)
Recommended Standards
- Sodium Valproate Impurity 40 (CAS CATO-C4X-116640)
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- Estradiol Impurity 22 (CAS CATO-C4X-163622)
- Ritonavir Geo-isomer (CAS 959315-21-0)
- Nebivolol Impurity 75 (CAS CATO-C4X-196875)
- Bendamustine impurity 32 (CAS CATO-C4X-127132)
- Murrangatin (CAS 37126-91-3)
- 4-Fluoro-3-(trifluoromethyl)benzimidamide (CAS 1379359-91-7)
- 1-((1,4-Dioxaspiro[4.4]nonan-2-yl)methyl)-3-(2,3-dimethoxyphenyl)urea (CAS 1251547-24-6)
- Cyclo(Pro-Val) (CAS 5654-87-5)
- N-(4-nitrophenyl)-2-thiocyanatoacetamide (CAS 331981-23-8)
- 5-Hydroxypentyl 4-methylbenzenesulfonate (CAS 95769-37-2)
- D-Ala21-Tirzepatide (CAS CATO-CPTD788913)
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