Hydrocortisone EP Impurity K CAS 640-87-9
| CAS No. | 640-87-9 |
| Molecular Formula | C23H32O5 |
| Molecular Weight | 388.50 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Hydrocortisone EP Impurity K (C23H32O5) contains a flavonoid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 388.50 g/mol, it falls into the moderately-high-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Hydrocortisone EP Impurity K (CAS 640-87-9) is a certified pharmaceutical impurity reference standard with the molecular formula C23H32O5 and a molecular weight of 388.50 g/mol.
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 manufactures Hydrocortisone EP Impurity K 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 | C23H32O5 |
| Molecular Weight | 388.50 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 methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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 Hydrocortisone Standards
- Hydrocortisone Impurity 64 (CAS 96391-56-9)
- Hydrocortisone EP Impurity E (CAS 7753-60-8)
- Hydrocortisone EP Impurity O (CAS 154032-37-8)
- Hydrocortisone Impurity 21 (CAS 68473-77-8)
- Hydrocortisone EP Impurity D (CAS 53-35-0)
- Hydrocortisone EP Impurity H (CAS CATO-C4X-14018)
- Hydrocortisone EP Impurity I (CAS 103795-84-2)
- Hydrocortisone 21-Carboxylic Acid (CAS 57172-48-2)
Recommended Standards
- Buspirone EP Impurity N (CAS 257877-44-4)
- N-Nitroso Lurasidone Impurity 65 (CAS CATO-C4X-102865)
- Prednisolone impurity 58 (CAS 19357-45-0)
- 54526-95-3 C23H32O5 (CAS 54526-95-3)
- Rivaroxaban Impurity 28 (CAS 2206360-74-7)
- Mirogabalin Impurity 96 (CAS CATO-C4X-292496)
- Oxacillin Impurity 52 (CAS CATO-C4X-232152)
- 2-Oxa-6-azaspiro[3.3]heptane Oxalate (CAS 1159599-99-1)
- Ethyl 1-(cyanomethyl)-5-methyl-1H-pyrazole-3-carboxylate (CAS 1233026-17-9)
- 4-(3-Bromophenoxy)-2-trifluoromethylphenylamine (CAS 1036446-60-2)
- 4-(((Tert-butoxycarbonyl)amino)methyl)bicyclo[2.2.2]Octane-1-carboxylic acid (CAS 219996-49-3)
- 5-(Piperidin-4-yl)pyrimidine (CAS 733738-49-3)
- (E)-3-(4-(Difluoromethoxy)phenyl)acrylic acid (CAS 127842-70-0)
- Semaglutide Impurity 155 (x TFA Salt) (CAS CATO-C4X-2226155)
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