cis-Permethrin EP Impurity G CAS 85576-82-5
| CAS No. | 85576-82-5 |
| Molecular Formula | 2*C21H19ClO3 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, cis-Permethrin EP Impurity G (C21H19ClO3) contains a steroid core, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 354.83 g/mol, it falls into the moderately-high-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
As a process- or degradation-related impurity, cis-Permethrin EP Impurity G (CAS 85576-82-5, C21H19ClO3) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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.
As a certified reference material (CRM), cis-Permethrin EP Impurity G 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 | 2*C21H19ClO3 |
| Molecular Weight | 354.83 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1981 |
| Halogen Content | Cl-containing |
Related cis Standards
- Permethrin-d5 (cis/trans mixture) (CAS 1794760-19-2)
- trans-Permethrin Solution, 10 mg/L, 2 x 5 ml (CAS 51877-74-8)
- Permethrin (CAS 52645-53-1)
- Permethrin EP Impurity E (CAS 53874-66-1)
- cis-Permethrin Solution, 10 mg/L, 2 x 5 ml (CAS 54774-45-7)
- Permethrin EP Impurity H (CAS 56860-12-9)
- Permethrin Impurity 4 (CAS 59897-92-6)
- Permethrin Impurity 11 (CAS 60066-84-4)
Recommended Standards
- Valganciclovir EP Impurity Q Isomer (CAS CATO-C4X-177430)
- Clindamycin Impurity 68 (CAS CATO-C4X-134168)
- Huperzine A Impurity 1 (CAS CATO-C4X-31231)
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- 1,1-Difluoro-1-phenylpropan-2-ol (CAS 29548-92-3)
- 7-Chloro-6-Fluoro-1-Ethyl-1,4-Dihydro-4-Oxopyrido(2,3-c)Pyridazine-3-Carboxylic Acid (CAS 120876-49-5)
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- 4-(3-Bromopyrazolo[1,5-a]pyridin-4-yl)-2-methylbut-3-yn-2-ol (CAS 2238831-46-2)
- (Z)-Dodec-7-enal (CAS 63851-40-1)
- Peptide 435 (CAS CATO-CPTD788435)
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