Tetracycline EP Impurity D CAS 7518-17-4
| CAS No. | 7518-17-4 |
| Molecular Formula | C22H22N2O7 |
| Molecular Weight | 426.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Tetracycline EP Impurity D (C22H22N2O7) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 13.0, corresponding to approximately 13 ring(s) or double-bond equivalent(s). With a molecular weight of 426.42 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.
CATO supplies Tetracycline EP Impurity D (CAS 7518-17-4), a pharmacopoeial impurity reference standard (molecular formula C22H22N2O7, MW 426.42 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.
As a certified reference material (CRM), Tetracycline EP Impurity D 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 | C22H22N2O7 |
| Molecular Weight | 426.42 g/mol |
| Appearance | Pale yellow to 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1959 |
| Nitrogen Atoms | 2 |
Related Tetracycline Standards
- Tetracycline EP Impurity C (CAS 1665-56-1)
- Tetracycline Impurity 9 (CAS CATO-C4X-23319)
- Tetracycline Impurity 8 (CAS CATO-C4X-23318)
- Tetracycline EP Impurity B (CAS 6542-44-5)
- Tetracycline EP Impurity A (CAS 79-85-6)
- Tetracycline-d6 (CAS CATO-CCHM702732)
- Tetracycline-d6 (CAS 2373374-42-4)
- Tetracycline impurity 5 (CAS CATO-C4X-23315)
Recommended Standards
- Larotrectinib Impurity 16 (CAS 2699151-02-3)
- Azilsartan Impurity 41 (CAS CATO-C4X-109641)
- Lemborexant Impurity 22 (CAS 1369765-96-7)
- 72458-85-6 3H-Bis(1)benzopyrano(3,4-b:6',5'-e)pyran-7(7aH)-one, 13,13a-dihydro-6,7a-dihydroxy-9,10-dimethoxy-3,3-dimethyl-, (7aR-cis)- DTXSID50222755 (CAS 72458-85-6)
- Buspirone impurity 01 (CAS 105496-33-1)
- Cefadroxil Impurity 24(L-isomer) (CAS CATO-C4X-122424)
- Finasteride Impurity 22 (CAS CATO-C4X-164522)
- 4-Hydroxymethyl-1-methyl-2-piperidone (CAS 20845-32-3)
- 2-((1-(3-Chlorophenyl)ethyl)amino)butan-1-ol (CAS 1038236-53-1)
- Ethyl trans-5-amino-tetrahydro-pyran-2-carboxylate (CAS 146689-73-8)
- (6-Phenylpyridin-3-yl)methanamine (CAS 294648-38-7)
- 5-Hydroxy-4-Methyl-2(5H)Furanone (CAS 40834-42-2)
- D-Rhamnose (CAS 634-74-2)
- Semaglutide impurity 93 (CAS CATO-C4X-222693)
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