Sulpiride EP Impurity B CAS 33045-52-2
| CAS No. | 33045-52-2 |
| Molecular Formula | C9H11NO5S |
| Molecular Weight | 245.25 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Sulpiride EP Impurity B.
Sulpiride EP Impurity B (CAS 33045-52-2) is a certified pharmaceutical impurity reference standard with the molecular formula C9H11NO5S and a molecular weight of 245.25 g/mol.
Structurally, Sulpiride EP Impurity B (C9H11NO5S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. 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 245.25 g/mol, it falls into the medium-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.
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.
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.
Physical & Chemical Properties
| Molecular Formula | C9H11NO5S |
| Molecular Weight | 245.25 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Sulpiride Standards
- Sulpiride Impurity 20 (CAS 94134-07-3)
- Sulpiride Impurity 23 (CAS CATO-C4X-187623)
- Sulpiride impurity 15 (CAS 77718-16-2)
- Sulpiride Impurity 16 (CAS 34556-95-1)
- Sulpiride EP Impurity D (CAS 22117-85-7)
- Sulpiride EP Impurity C (CAS 33045-53-3)
- Sulpiride EP Impurity E (CAS 52395-25-2)
- Sulpiride impurity 13 (CAS CATO-C4X-187613)
Recommended Standards
- Tedizolid Impurity 45 (CAS 149524-47-0)
- Elagolix Impurity 50 (CAS CATO-C4X-206850)
- Isopropyl 4-nitrobenzenesulfonate (CAS 1830-67-7)
- Landiolol Impurity 53 (CAS 64704-12-7)
- Dexamethasone Impurity 116 (CAS 107419-73-8)
- Daraxonrasib Impurity 2 (CAS CATO-C4X-35182)
- Difelikefalin Impurity 93 (CAS CATO-C4X-304193)
- (αR)-α-Methyl-1-phenyl-1H-pyrazole-4-methanol (CAS 1394051-16-1)
- 7-chloro-5-(chloromethyl)-1H-pyrazolo[4,3-d]pyrimidine (CAS 2932453-23-9)
- 3-(2,3-Dichloro-4-methoxyphenyl)benzo[d]isoxazole (CAS 87828-90-8)
- 3-Nitro-4-(phenylsulfanyl)benzonitrile (CAS 33358-29-1)
- 1-Chloro-4-isobutoxybutane (CAS 55913-42-3)
- 4-(Quinolin-8-yl)benzaldehyde (CAS 380359-19-3)
- Insulin Degludec Impurity 15 (CAS CATO-C4X-215715)
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