Formoterol Impurity N1 CAS 43229-66-9
| CAS No. | 43229-66-9 |
| Molecular Formula | C32H32N2O5 |
| Molecular Weight | 524.61 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, Formoterol Impurity N1 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 524.61 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 process- or degradation-related impurity, Formoterol Impurity N1 (CAS 43229-66-9, C32H32N2O5) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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), Formoterol Impurity N1 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 | C32H32N2O5 |
| Molecular Weight | 524.61 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1969 |
| Nitrogen Atoms | 2 |
Related Formoterol Standards
- Formoterol impurity 122 (CAS 143687-25-6)
- Formoterol impurity 143 (CAS CATO-C4X-1525143)
- Formoterol Impurity 29 (CAS 43229-67-0)
- rac Formoterol 1-O-β-D-Glucuronide (CAS 250336-07-3)
- Formoterol Impurity 14 (CAS 615551-59-2)
- Formoterol Impurity 16 (CAS CATO-C4X-152516)
- Formoterol Impurity 25 (CAS CATO-C4X-152525)
- Formoterol Impurity 76 (CAS CATO-C4X-152576)
Recommended Standards
- 2,2'-((9H-Fluorene-2,7-disulfonyl)bis(azanediyl))bis(3-methylbutanoic acid) (CAS 307941-68-0)
- Sildenafil Impurity 277 (CAS CATO-C4X-1128277)
- (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4-((R)-3-(tert-butoxycarbonyl)-2,2-dimethyloxazolidin-5-yl)butanoic acid (CAS 441020-33-3)
- Amoxicillin Impurity 38 (CAS CATO-C4X-114838)
- Dopamine Impurity C01 HCl (CAS 3167-06-4)
- Colchicine Impurity 8 (CAS 6877-25-4)
- Nabumetone EP Impurity B (CAS 343272-51-5)
- (4-(Benzo[d]thiazol-2-yl)piperazin-1-yl)(2,5-dichlorothiophen-3-yl)methanone (CAS 681164-50-1)
- 2-(4-Isopropylphenyl)-5-phenyl-1H-imidazole-4-thiol (CAS 1325306-39-5)
- 3-{2,4-dioxo-1,3-diazaspiro[4.4]nonan-3-yl}benzonitrile (CAS 1303756-15-1)
- 3-Bromo-4-cyclopropoxypicolinonitrile (CAS 1243387-06-5)
- Propargyl-PEG3-NHS ester (CAS 1428629-71-3)
- 2-(4-chlorophenyl)butanenitrile (CAS 39066-10-9)
- Neuropeptide GE (CAS 134748-04-2)
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