Prednisone Impurity 28 (20(S)-Hydroxy Methylprednisolone) CAS 387-66-6
| CAS No. | 387-66-6 |
| Molecular Formula | C22H32O5 |
| Molecular Weight | 376.49 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Prednisone Impurity 28 (20(S)-Hydroxy Methylprednisolone) 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.
CATO supplies Prednisone Impurity 28 (20(S)-Hydroxy Methylprednisolone) (CAS 387-66-6), a certified reference material (molecular formula C22H32O5, MW 376.49 g/mol) for analytical method development and quality control.
Prednisone Impurity 28 (20(S)-Hydroxy Methylprednisolone) (C22H32O5) contains a flavonoid core, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C22H32O5 |
| Molecular Weight | 376.49 g/mol |
| Appearance | Off-white to pale 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Prednisone Standards
- Prednisone Impurity 29 (20(R)-Hydroxy Methylprednisolone) (CAS 387-65-5)
- Prednisone Impurity 14 (CAS 94088-91-2)
- Prednisone Impurity 5 (CAS 215095-77-5)
- Prednisone Impurity 12 (CAS CATO-C4X-169412)
- Prednisone Impurity N56 (CAS 103466-44-0)
- Prednisone Impurity N297 (CAS 1249-67-8)
- Prednisone Impurity 14 (CAS CATO-C4X-169414)
- Prednisone-d8 (CAS CATO-C4X-191927)
Recommended Standards
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- Resolvin D1 (CAS 872993-05-0)
- N-(2-(Azepan-1-yl)-2-(thiophen-3-yl)ethyl)-2-(2-fluorophenoxy)acetamide (CAS 946374-90-9)
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- 3-(Aminomethyl)-2-(methylthio)phenol (CAS 1243460-96-9)
- 1,3-Dimethyl-7-(piperidin-1-yl)pyrimido[4,5-d]pyrimidine-2,4(1H,3H)-dione (CAS 162147-60-6)
- 2-Amino-5-(4-bromophenyl)-5-[(3,4,5-trimethoxyphenyl)methyl]-4,5-dihydro-1H-imidazol-4-one (CAS 1354918-47-0)
- 4-[4-(4'-Chlorobiphenyl-2-ylmethyl)piperazin-1-yl]benzoic Acid-d8 (CAS 1246819-26-0)
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- Methyl 3-amino-4-((furan-2-ylmethyl)sulfonyl)thiophene-2-carboxylate (CAS 690632-80-5)
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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