Ursodeoxycholic Acid Impurity 118 CAS 83896-19-9
| CAS No. | 83896-19-9 |
| Molecular Formula | C23H38N2O5 |
| Molecular Weight | 422.56 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Ursodeoxycholic Acid Impurity 118 (CAS 83896-19-9) is a certified pharmaceutical impurity reference standard with the molecular formula C23H38N2O5 and a molecular weight of 422.56 g/mol.
Structurally, Ursodeoxycholic Acid Impurity 118 (C23H38N2O5) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 422.56 g/mol, it falls into the moderately-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.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
Physical & Chemical Properties
| Molecular Formula | C23H38N2O5 |
| Molecular Weight | 422.56 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| 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 |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1980 |
| Nitrogen Atoms | 2 |
Related Ursodeoxycholic Standards
- Ursodeoxycholic Acid Impurity 117 (CAS 69700-82-9)
- Ursodeoxycholic Acid Impurity 71 (CAS 69519-35-3)
- Ursodeoxycholic Acid Impurity 1 (CAS 4057-84-5)
- Ursodeoxycholic Acid impurity 75 (CAS 1516887-32-3)
- Ursodeoxycholic Acid-d5 Methyl Ester (CAS 93701-19-0)
- Ursodeoxycholic Acid Impurity 130 (CAS 63060-59-3)
- Ursodeoxycholic Acid Impurity 109 (CAS CATO-C4X-1422109)
- Ursodeoxycholic Acid impurity 90 (CAS CATO-C4X-142290)
Recommended Standards
- Ezetimibe Impurity 70 (CAS 937636-63-0)
- Ketoprofen Impurity 56 (CAS 157740-17-5)
- N,N’-[(1S,2S)-Cyclohexane-1,2-diyl]bis(4-methylbenzenesulfonamide) (CAS 212555-28-7)
- Ramipril EP Impurity C (CAS 99742-35-5)
- Crisaborole lmpurity 76 (CAS 2227126-09-0)
- Sulfasalazine EP Impurity E Trisodium Salt (CAS 1391062-34-2 (free acid))
- Fedratinib Impurity 6 (CAS 936091-39-3)
- 5-Hydroxymethylsalicylaldehyde (CAS 74901-08-9)
- 2-((Triisopropylsilyl)oxy)acetohydrazide (CAS 622373-93-7)
- (R)-3-Amino-4-(1H-indol-3-yl)butanoic acid (CAS 736131-01-4)
- ((3AS,4R,6R,7R,7aR)-7-hydroxy-6-methoxy-2,2-dimethyltetrahydro-4H-[1,3]dioxolo[4,5-c]pyran-4-yl)methyl 4-methylbenzenesulfonate (CAS 20688-91-9)
- (1R,2S)-methyl 2-hydroxycyclopentanecarboxylate (CAS 122331-02-6)
- 1-(1-(4-Fluorophenyl)-1H-pyrazol-4-yl)ethan-1-amine (CAS 1049988-73-9)
- Tau Peptide (337-368) (Repeat 4 Domain) trifluoroacetate salt (CAS 330456-27-4)
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