Chlorhexidine Impurity 19 CAS CATO-C4X-225619
| CAS No. | CATO-C4X-225619 |
| Molecular Formula | C16H32N8O2 |
| Molecular Weight | 368.48 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Chlorhexidine Impurity 19 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.
As a process- or degradation-related impurity, Chlorhexidine Impurity 19 (CAS CATO-C4X-225619, C16H32N8O2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Chlorhexidine Impurity 19 (C16H32N8O2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
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.
Physical & Chemical Properties
| Molecular Formula | C16H32N8O2 |
| Molecular Weight | 368.48 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 95% |
| Storage | Store at 2-8°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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 8 |
Related Chlorhexidine Standards
- Chlorhexidine EP Impurity A (CAS 152504-08-0)
- Chlorhexidine EP Impurity N (CAS 152504-10-4)
- Chlorhexidine Diacetate EP Impurity B (CAS 1308292-89-8)
- Chlorhexidine Impurity 25 (CAS CATO-C4X-225625)
- Chlorhexidine Impurity 32 (CAS CATO-C4X-225632)
- Chlorhexidine Digluconate Solution EP Impurity L (CAS CATO-C4X-225637)
- Chlorhexidine Impurity 5 (CAS 2518301-34-1)
- Chlorhexidine Impurity 31 (CAS CATO-C4X-225631)
Recommended Standards
- 4-Fluorophenyl 4-(trans-4-pentylcyclohexyl)benzoate (CAS 79912-98-4)
- N-(4-(6-Fluoro-3,4-dihydroisoquinolin-2(1H)-yl)-2,6-dimethylphenyl)-3,3-dimethylbutanamide (CAS 1009344-33-5)
- 2-((2-(5-Cyano-2-methyl-6-(methylthio)pyridin-3-yl)-2-oxoethyl)thio)-4,6-dimethylnicotinonitrile (CAS 329908-91-0)
- 2-Methoxy-4-[4-[4-(methylsulfonyl)-1-piperazinyl]-1-piperidyl]aniline (CAS 1089279-70-8)
- Loteprednol Etabonate 11-Oxo Impurity (CAS 207670-54-0)
- Lifitegrast Impurity 16 (CAS 2322380-18-5)
- Pemafibrate Impurity 101 (CAS CATO-C4X-2903101)
- 5-Chloro-2-(difluoromethyl)-3-methoxypyridin-4-amine (CAS 1805336-38-2)
- 3,4-Dimethyl-3-(2,3-dimethylphenyl)propiophenone (CAS 898792-83-1)
- HYDROXYFLAVANONE, 3'- (CAS 92496-65-6)
- 4-(4-Cyanobutoxy)-3-methoxybenzonitrile (CAS 1306095-35-1)
- Ethyl 2-(8-bromo-1,3-difluorophenanthren-2-yl)-2,3,3,3-tetrafluoropropanoate (CAS 843614-94-8)
- LCZ-696 Impurity 15 (CAS 149709-49-9)
- Semaglutide Impurity 152 xTFA (CAS CATO-C4X-2226152)
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