Terbutaline Impurity 28 CAS 28924-25-6
| CAS No. | 28924-25-6 |
| Molecular Formula | C26H31NO3 |
| Molecular Weight | 405.53 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
CATO supplies Terbutaline Impurity 28 (CAS 28924-25-6), a pharmacopoeial impurity reference standard (molecular formula C26H31NO3, MW 405.53 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, Terbutaline Impurity 28 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 405.53 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).
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.
Physical & Chemical Properties
| Molecular Formula | C26H31NO3 |
| Molecular Weight | 405.53 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1965 |
| Nitrogen Atoms | 1 |
Related Terbutaline Standards
- Terbutaline Impurity 21 (CAS CATO-C4X-118321)
- Terbutaline Impurity 6 (CAS 52144-90-8)
- Terbutaline impurity 96 (CAS CATO-C4X-118396)
- Terbutaline impurity 102 (CAS CATO-C4X-1183102)
- Terbutaline impurity 103 (CAS CATO-C4X-1183103)
- Terbutaline Impurity 34 (CAS 28924-18-7)
- Terbutaline Impurity 47 (CAS CATO-C4X-118347)
- Terbutaline impurity 97 (CAS CATO-C4X-118397)
Recommended Standards
- Roxatidine impurity 64 (CAS CATO-C4X-121364)
- Mitiglinide Impurity 18 (CAS 145324-19-2)
- Roxatidine Impurity 76 (CAS CATO-C4X-121377)
- Abiraterone Acetate 7-Keto Impurity (CAS CATO-C4X-107072)
- Teprenone Impurity 26 (CAS CATO-C4X-208126)
- Guanfacine Impurity 6 (CAS 90793-64-9)
- Clozapine impurity 10 (CAS 67990-66-3)
- Nicotinamide (CAS 98-92-0)
- Carbazochrome Impurity N7 (CAS 70063-07-9)
- n-(4-Acetylphenyl)-2-iodoacetamide (CAS 596107-48-1)
- (2R,3R)-(-)-2,3-Bis(diphenylphosphino)bicyclo[2.2.1]hept-5-ene (CAS 76740-45-9)
- Tert-butyl 2-(2-chloroethyl)-2-cyanopyrrolidine-1-carboxylate (CAS 960294-12-6)
- Viburtinal (CAS 63661-79-0)
- D-γ-Glu20-Side-Tirzepatide (CAS CATO-CPTD788929)
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