Terbutaline Impurity 35 CAS 28924-21-2
| CAS No. | 28924-21-2 |
| Molecular Formula | C22H20O3 |
| Molecular Weight | 332.39 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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 supplies Terbutaline Impurity 35 (CAS 28924-21-2), a pharmacopoeial impurity reference standard (molecular formula C22H20O3, MW 332.39 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a steroid core, a hydroxyl group, an ether linkage, Terbutaline Impurity 35 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 332.39 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).
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.
Physical & Chemical Properties
| Molecular Formula | C22H20O3 |
| Molecular Weight | 332.39 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1965 |
Related Terbutaline Standards
- Terbutaline Impurity N24 (CAS 27628-06-4)
- Terbutaline Impurity 12 (CAS 22877-01-6)
- Terbutaline Impurity 15 (CAS 3886-19-9)
- Terbutaline Impurity 22 (CAS 50841-47-9)
- Terbutaline Impurity 27 (CAS 147942-88-9)
- Terbutaline Impurity 5 (CAS 21766-81-4)
- Terbutaline Impurity 37 (CAS 28917-43-3)
- Terbutaline Impurity 88 (CAS CATO-C4X-118388)
Recommended Standards
- Loxoprofen Impurity 44 (CAS 1152440-23-7)
- Dexrazoxane Impurity 34 (CAS CATO-C4X-202034)
- Viloxazine Impurity 12 (CAS 3024393-81-2)
- Mosapride Impurity 12 (CAS CATO-C4X-104412)
- Cyanocobalamin Impurity 29 (CAS 23388-02-5 (unfixed chirality))
- Sitagliptin Impurity 107 (CAS 89124-06-1)
- Topiroxostat Impurity 10 (CAS 2044702-36-3)
- Methyl d-Mandelate (CAS 21210-43-5)
- 2-Chloro-N-methyl-N-(1-methyl-pyrrolidin-3-ylmethyl)-acetamide (CAS 1341580-30-0)
- 6-Bromo-3-(2-fluorophenyl)-2-methylquinazolin-4(3H)-one (CAS 352346-59-9)
- Grandisin (CAS 53250-50-3)
- 2-Methanesulfonylmethyl-pyrimidin-4-ylamine (CAS 1248236-11-4)
- Olopatadine (CAS 113806-05-6)
- Integrin Binding Peptide trifluoroacetate salt (CAS 278792-07-7)
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