Tulobuterol Impurity 25 CAS CATO-C4X-213425
| CAS No. | CATO-C4X-213425 |
| Molecular Formula | C14H20ClNO2 |
| Molecular Weight | 269.77 g/mol |
| 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.
Tulobuterol Impurity 25 (CAS CATO-C4X-213425) is a certified pharmaceutical impurity reference standard with the molecular formula C14H20ClNO2 and a molecular weight of 269.77 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, Tulobuterol Impurity 25 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 269.77 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
As a certified reference material (CRM), Tulobuterol Impurity 25 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 | C14H20ClNO2 |
| Molecular Weight | 269.77 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Tulobuterol Standards
- Tulobuterol Impurity 27 (CAS CATO-C4X-213427)
- Tulobuterol Impurity 22 (CAS 5639-00-9)
- Tulobuterol Impurity 35 (CAS 1597775-10-4)
- Tulobuterol Impurity 15 (CAS CATO-C4X-213415)
- Tulobuterol Impurity 26 (CAS CATO-C4X-213426)
- Tulobuterol Impurity 13 (CAS CATO-C4X-213413)
- Tulobuterol Impurity 18 (CAS CATO-C4X-213418)
- Tulobuterol Impurity 7 (CAS CATO-C4X-21347)
Recommended Standards
- Sertraline Impurity 46 (CAS CATO-C4X-134446)
- Clomipramine Hydrochloride EP Impurity C (CAS 1425793-87-8)
- Bilastine impurity 107 (CAS CATO-C4X-2253107)
- Baclofen Impurity 79 (CAS 947583-11-1)
- Dosulepin N-Oxide Sulfoxide hydrochloride (CAS CATO-C4X-33561)
- Dotinurad Impurity 74 (CAS CATO-C4X-249474)
- Pemetrexed Impurity 34 (CAS 1320346-43-7)
- 2-(3-(Benzyloxy)thiophene-2-carbonyl)hydrazine-1-carbothioamide (CAS 339022-29-6)
- 2-(2-((4-Ethylcyclohexyl)amino)ethoxy)ethan-1-ol (CAS 1038266-49-7)
- 3-[(2-nitrophenyl)amino]propanenitrile (CAS 33141-24-1)
- Methyl 4,4-difluoro-3-oxobutanoate (CAS 89129-66-8)
- tert-Butyl 3-morpholinopropanoate (CAS 262858-31-1)
- (2S)-1-[(4-Bromophenyl)carbonyl]-2-methylpyrrolidine-2-carboxylic acid (CAS 2140265-41-2)
- Semaglutide impurity 103 (CAS 1446013-07-5)
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