Cholesterol Impurity 28 CAS CATO-C4X-196728
| CAS No. | CATO-C4X-196728 |
| Molecular Formula | C27H43O4S |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Cholesterol Impurity 28 is closely related to a steroid core, a sulfone group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Cholesterol Impurity 28 (CAS CATO-C4X-196728) is a certified pharmaceutical impurity reference standard with the molecular formula C27H43O4SNa and a molecular weight of 486.69 g/mol.
Structurally, Cholesterol Impurity 28 (C27H43O4SNa) contains a steroid core, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 6.5, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 486.69 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).
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 Cholesterol Impurity 28 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 | C27H43O4S Na |
| Molecular Weight | 486.69 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, 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) | 6.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Sulfur Atoms | 1 |
Related Cholesterol Standards
- Cholesterol hexanoate (CAS 1062-96-0)
- Cholesterol Impurity 31 (CAS 117556-83-9)
- Cholesterol isobutyrate (CAS 1180-43-4)
- Cholesterol n-Octanoate (CAS 1182-42-9)
- Cholesterol-5α,6α-epoxide (CAS 1250-95-9)
- Cholesterol Impurity 6 (CAS 1251-98-5)
- Cholesterol Impurity 30 (CAS 1253-88-9)
- Cholesterol Impurity 20 (CAS 1254-03-1)
Recommended Standards
- Bromfenac Impurity 55 (CAS CATO-C4X-200255)
- Dapagliflozin Impurity 138 (CAS CATO-C4X-1138138)
- Etoposide impurity 21 (CAS CATO-C4X-202421)
- (E)-[1-(4-Chlorophenyl)-2-[(4-chlorophenyl)methanesulfinyl]ethylidene](methoxy)amine (CAS 320422-57-9)
- Methyl 3-((diethoxyphosphoryl)methyl)benzoate (CAS 96534-02-0)
- 5-Aminospiro[2.3]hexane-1-carbonitrile (CAS 2090428-25-2)
- 6-amino-3-(2-methoxyethyl)-3,4-dihydroquinazolin-4-one (CAS 1157072-57-5)
- 1-(3-Fluorobenzyl)piperidin-4-amine hydrochloride (CAS 1261235-63-5)
- Pirfenidone Impurity 49 (CAS CATO-C4X-222949)
- [Formaldehyde Schiff-base]-Semaglutide Impurity 136 X TFA Salt (CAS CATO-C4X-2226136)
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