Formoterol impurity 103 CAS 1346746-81-3
| CAS No. | 1346746-81-3 |
| Molecular Formula | C19H24N2O4 |
| Molecular Weight | 344.40 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Formoterol impurity 103 (CAS 1346746-81-3) is a certified pharmaceutical impurity reference standard with the molecular formula C19H24N2O4 and a molecular weight of 344.40 g/mol.
Formoterol impurity 103 (C19H24N2O4) contains a flavonoid core, 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.
CATO manufactures Formoterol impurity 103 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C19H24N2O4 |
| Molecular Weight | 344.40 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Nitrogen Atoms | 2 |
Related Formoterol Standards
- Formoterol (Mixture of Diastereomers) (CAS 128954-45-0)
- Formoterol impurity 116 (CAS CATO-C4X-1525116)
- Formoterol (CAS 73573-87-2)
- Formoterol Impurity 111 (CAS CATO-C4X-1525111)
- Formoterol impurity 124 (CAS CATO-C4X-1525124)
- Formoterol Impurity 137 (CAS CATO-C4X-1525137)
- Formoterol impurity 142 (CAS CATO-C4X-1525142)
- Formoterol Impurity 23 (CAS 43229-01-2)
Recommended Standards
- (R,R)-Formoterol Impurity (CAS 67346-49-0)
- (S,R)-Formoterol (CAS 67346-50-3)
- Propranolol Impurity 55 (CAS CATO-C4X-151955)
- Propranolol EP Impurity C (CAS 17216-10-3)
- Fluorouracil Impurity 20 (CAS CATO-C4X-164920)
- Oxadiazol Impurity 1 (CAS CATO-C4X-24001)
- Cefprozil Impurity 47 (CAS CATO-C4X-149247)
- Erlotinib Impurity 66 (CAS CATO-C4X-106966)
- 2-O-Ethyl-2′-O-methyluridine (CAS 1352173-49-9)
- 3-(4-Bromophenyl)-N-cyclopropylpropanamide (CAS 1704065-11-1)
- 2,6,6-Trimethyl-1-phenyl-6,7-dihydro-1H-indol-4(5H)-one (CAS 57663-14-6)
- Apixaban Impurity 107 (CAS 118241-48-8)
- 3-Bromo-2-(difluoromethyl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazole (CAS 2248387-28-0)
- CGMP Dependent Kinase Inhibitor Peptide (CAS 82801-73-8)
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