(RS+SR)-Formoterol Impurity 80 Hemifumarate CAS 143687-26-7
| CAS No. | 143687-26-7 |
| Molecular Formula | 2*C33H36N2O4 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, (RS+SR)-Formoterol Impurity 80 Hemifumarate (CAS 143687-26-7, C33H36N2O4C4H4O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, (RS+SR)-Formoterol Impurity 80 Hemifumarate (C33H36N2O4C4H4O4) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 19.0, corresponding to approximately 19 ring(s) or double-bond equivalent(s). With a molecular weight of 640.73 g/mol, it falls into the 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).
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 (RS+SR)-Formoterol Impurity 80 Hemifumarate 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 | 2*C33H36N2O4 C4H4O4 |
| Molecular Weight | 640.73 g/mol |
| 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) | 19.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1998 |
| Nitrogen Atoms | 2 |
Recommended Standards
- Baricitinib Impurity 137 (CAS CATO-C4X-2260137)
- Dalbavancin Impurity 32 (CAS CATO-C4X-160232)
- Olaparib Impurity 85 (CAS CATO-C4X-113585)
- 2-(Ethylthio)benzaldehyde (CAS 53606-33-0)
- Ornidazole Impurity 91 (CAS CATO-C4X-133191)
- 2-(5-Bromo-2-methylbenzo[d]oxazol-7-yl)acetonitrile (CAS 1708168-02-8)
- (-)-Oxypeucedanin hydrate (CAS 133164-11-1)
- 1-(4-Ethoxyphenyl)-3-oxocyclobutane-1-carboxylic acid (CAS 1468669-12-6)
- Methyl 2-(4-chlorophenyl)-4-oxo-4-[4-(trifluoromethyl)phenyl]butanoate (CAS 882748-10-9)
- Semaglutide impurity 107 (CAS CATO-C4X-2226107)
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