Terbutaline impurity 138 CAS CATO-C4X-1183138
| CAS No. | CATO-C4X-1183138 |
| Molecular Formula | C22H18O5 |
| Molecular Weight | 362.38 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Terbutaline impurity 138 is closely related to a flavonoid core, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Terbutaline impurity 138 (CAS CATO-C4X-1183138) is a certified pharmaceutical impurity reference standard with the molecular formula C22H18O5 and a molecular weight of 362.38 g/mol.
Terbutaline impurity 138 (C22H18O5) contains a flavonoid core, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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), Terbutaline impurity 138 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 | C22H18O5 |
| Molecular Weight | 362.38 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 methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Terbutaline Standards
- Terbutaline Sulphate Impurity 50 (CAS 50841-46-8)
- Terbutaline impurity 106 (CAS CATO-C4X-1183106)
- Terbutaline impurity 110 (CAS CATO-C4X-1183110)
- Terbutaline Impurity 79 (CAS CATO-C4X-118379)
- Terbutaline Impurity 56 (CAS CATO-C4X-118356)
- Terbutaline Impurity 57 (CAS CATO-C4X-118357)
- Terbutaline Impurity 58 (CAS CATO-C4X-118358)
- Terbutaline impurity 101 (CAS 1226543-90-3)
Recommended Standards
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- Minodronic Impurity 3 (CAS CATO-C4X-12413)
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