(R,R)-Formoterol Impurity Tartrate CAS 67346-49-0(Free Base)
| CAS No. | 67346-49-0(Free Base) |
| Molecular Formula | C19H24N2O4 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
(R,R)-Formoterol Impurity Tartrate (CAS 67346-49-0(Free Base)) is a certified pharmaceutical impurity reference standard with the molecular formula C19H24N2O4C4H6O6 and a molecular weight of 494.50 g/mol.
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, (R,R)-Formoterol Impurity Tartrate is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 494.50 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), (R,R)-Formoterol Impurity Tartrate 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 | C19H24N2O4 C4H6O6 |
| Molecular Weight | 494.50 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
Recommended Standards
- N-Nitroso Dalilesen impurity 15 (CAS CATO-C4X-301015)
- Donepezil Impurity 18 (CAS 90843-62-2)
- Relugolix Impurity 173 (CAS CATO-C4X-2429173)
- 2,6-Difluoro-4-methoxybenzoic Acid (CAS 123843-65-2)
- Methyl (chloromethyl)(methyl)carbamate (CAS 6807-44-9)
- 4-(2,3-dihydro-1,4-benzodioxin-6-yl)butan-2-one (CAS 30830-56-9)
- Ethyl 6-(chloromethyl)nicotinate (CAS 10177-23-8)
- 3-(2,5-Dimethylbenzyl)azetidin-3-ol (CAS 1509218-66-9)
- 2-(6-Bromo-5-(difluoromethyl)-4-iodopyridin-2-yl)acetonitrile (CAS 1805422-24-5)
- Acetyl Dipeptide-1 (CAS 196604-48-5)
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