Ceftolozane impurity 7 CAS 1956303-45-9
| CAS No. | 1956303-45-9 |
| Molecular Formula | C23H30N12O8S2 |
| Molecular Weight | 666.69 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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 supplies Ceftolozane impurity 7 (CAS 1956303-45-9), a pharmacopoeial impurity reference standard (molecular formula C23H30N12O8S2, MW 666.69 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, Ceftolozane impurity 7 is typically pale yellow to yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 666.69 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
As a certified reference material (CRM), Ceftolozane impurity 7 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C23H30N12O8S2 |
| Molecular Weight | 666.69 g/mol |
| Purity | >95% |
| 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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Nitrogen Atoms | 12 |
| Sulfur Atoms | 2 |
Related Ceftolozane Standards
- Ceftolozane (CAS 689293-68-3)
- Ceftolozane impurity 8 (CAS 1956303-44-8)
- Ceftolozane impurity 9 (CAS 1852466-67-1)
- Ceftolozane Impurity 34 (CAS CATO-C4X-240634)
- Ceftolozane Impurity 35 (CAS CATO-C4X-240635)
- Ceftolozane Impurity 18 (CAS CATO-C4X-240618)
- Ceftolozane Impurity 29 (CAS CATO-C4X-240629)
- Ceftolozane Impurity 17 (CAS CATO-C4X-240617)
Recommended Standards
- Linezolid Impurity 112 (CAS CATO-C4X-1073112)
- (S)-SunPhos (CAS 765312-54-7)
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- (R)-SunPhos (CAS 765312-57-0)
- Vonoprazan Fumarate Impurity 56 (CAS 445-27-2)
- Lornoxicam Impurity 4 (CAS 106820-59-1)
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- Amlodipine Impurity 94 Oxalate (CAS CATO-C4X-109594)
- (4-(Anthracen-9-yl)phenyl)boronic acid (CAS 1615698-39-9)
- 7-Allyl-6-(methoxymethoxy)-4,4,5,8-tetramethylchroman-2-one (CAS 219938-57-5)
- 5-Fluoro-3-(piperidin-3-yl)-1H-indole (CAS 695213-99-1)
- Ethyl 8-amino-2-methylimidazo[1,2-a]pyridine-3-carboxylate (CAS 185133-90-8)
- [y-Glu3]-Semaglutide Impurity 135 (CAS CATO-C4X-2226135)
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