Norethisterone EP Impurity D CAS 68-23-5
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 68-23-5 |
| Molecular Formula | C20H26O2 |
| Molecular Weight | 298.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Norethisterone EP Impurity D (CAS 68-23-5) is a pharmacopoeial impurity standards certified reference material from CATO. Molecular formula: C20H26O2. Molecular weight: 298.42 g/mol. ISO 17034 accredited production ensures traceable purity and reliable analytical results.
Physical & Chemical Properties
| Molecular Formula | C20H26O2 |
| Molecular Weight | 298.42 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Norethisterone Standards
- Norethisterone EP Impurity G (CAS 38673-36-8)
- Norethisterone EP Impurity C (CAS 22933-71-7)
- Norethisterone EP Impurity A (CAS 31528-46-8)
- Norethisterone EP Impurity E (CAS 79727-03-0)
- Norethisterone EP Impurity H (CAS 51724-44-8)
- Norethisterone EP Impurity F (CAS 96487-85-3)
- Norethisterone Acetate (CAS 51-98-9)
- Norethisterone Acetate EP Impurity C (CAS 1175129-26-6)
Recommended Standards
- Exemestane EP Impurity H (CAS 122370-91-6)
- all-trans-3,4-Didehydro Retinoic Acid (CAS 4159-20-0)
- Exemestane EP Impurity E (CAS 19457-55-7)
- Erlotinib Impurity 104 (CAS CATO-C4X-1069104)
- Bisoprolol Impurity 74 (CAS 14435-48-4)
- 2-methoxyquinoline-4-carboxylic Acid (CAS 10222-62-5)
- N-(Benzo[b]thiophen-5-yl)-5-methylisoxazole-3-carboxamide (CAS 941903-16-8)
- 2,3-Diphenyl-5-(4-methoxyphenyl)tetrazolium Chloride (CAS 10560-45-9)
- Cyclo(-Trp-Tyr) TFA salt (CAS 20829-53-2(Free Base))
- Insulin Degludec Impurity 6 (CAS CATO-C4X-21576)
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 13829788188 / jacky.chen@cato-chem.com