Cholesterol Impurity 33 CAS 154440-71-8
| CAS No. | 154440-71-8 |
| Molecular Formula | C33H59N2O2 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Cholesterol Impurity 33 (C33H59N2O2I) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, iodine substitution. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 642.75 g/mol, it falls into the high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies Cholesterol Impurity 33 (CAS 154440-71-8), a pharmacopoeial impurity reference standard (molecular formula C33H59N2O2I, MW 642.75 g/mol) used for the identification and quantification of trace impurities in APIs.
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 33 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 | C33H59N2O2 I |
| Molecular Weight | 642.75 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2001 |
| Halogen Content | I-containing |
| Nitrogen Atoms | 2 |
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
- Oxcarbazepine Impurity 24 (CAS 78880-65-6)
- Terbinafine Impurity 52 (CAS 2416665-26-2)
- Pazopanib Impurity 54 (CAS CATO-C4X-172554)
- 2-Methyl-2-(4-methylphenyl)morpholine, 97% (CAS 902836-81-1)
- 2-Methyl-1-(oxetan-3-yl)piperazine bis(2,2,2-trifluoroacetate) (CAS 1776946-72-5)
- (2S,4S)-1-(tert-Butoxycarbonyl)-4-(4-iodophenoxy)-2-pyrrolidinecarboxylic acid (CAS 1354486-35-3)
- (Z)-({1-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]-1H-indol-3-yl}methylidene)(methoxy)amine (CAS 338410-02-9)
- Ethyl 2-amino-6-[(4-methylphenyl)sulfonyl]-4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3-carboxylate (CAS 474122-70-8)
- 2-Ethynyl-6-methoxyphenol (CAS 1607814-85-6)
- Eosinophilotactic Peptide (CAS 61756-28-3)
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