Salmeterol Impurity 2 CAS 160889-18-9
| CAS No. | 160889-18-9 |
| Molecular Formula | C17H17BrO4 |
| Molecular Weight | 365.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 365.22 g/mol gives Salmeterol Impurity 2 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies Salmeterol Impurity 2 (CAS 160889-18-9), a certified reference material (molecular formula C17H17BrO4, MW 365.22 g/mol) for analytical method development and quality control.
Structurally, Salmeterol Impurity 2 (C17H17BrO4) contains a flavonoid core, a hydroxyl group, an ether linkage, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 365.22 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), Salmeterol Impurity 2 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 | C17H17BrO4 |
| Molecular Weight | 365.22 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2002 |
| Halogen Content | Br-containing |
Related Salmeterol Standards
- Salmeterol Impurity 9 (CAS 27475-14-5)
- Salmeterol Impurity 28 (CAS CATO-C4X-105028)
- Salmeterol EP Impurity B (CAS 94749-02-7)
- Salmeterol Impurity N1 (CAS 97664-55-6)
- Salmeterol Impurity 12 (CAS 108928-82-1)
- Salmeterol EP Impurity F (CAS 1391054-40-2)
- Salmeterol EP Impurity C (CAS 94749-11-8)
- Salmeterol Impurity 29 (CAS CATO-C4X-105029)
Recommended Standards
- Ethyl 3-(benzyloxy)-6-bromo-5-ethylpyrazine-2-carboxylate (CAS 1269028-25-2)
- Methyl 4-(benzyloxy)-3-bromo-5-ethoxybenzoate (CAS 1706447-46-2)
- (E)-3-(3-((4-bromo-3,5-dimethyl-1H-pyrazol-1-yl)methyl)-4-methoxyphenyl)acrylic acid (CAS 1020050-90-1)
- 4-(Benzyloxy)-3-bromo-5-ethoxybenzohydrazide (CAS 1706447-73-5)
- 4-oxopyran-3-carboxamide (CAS 127350-47-4)
- N-(2,4-Dichloro-5-methoxyphenyl)-4-(2,2,2-trifluoroacetyl)benzamide (CAS 672951-50-7)
- 5-Methyl-3-(piperidin-4-yl)-1H-indole hydrochloride (CAS 1172830-18-0)
- 4-Aminoacetophenone oxime (CAS 38063-81-9)
- tert-Butyl 2-(chloromethyl)-4-methoxy-1H-benzo[d]imidazole-1-carboxylate (CAS 558445-48-0)
- 2-(3-Nitrophenyl)-4-(phenylsulfonyl)-5-(piperidin-1-yl)oxazole (CAS 330681-80-6)
- 5-Fluoro-1H-pyrrolo[3,2-b]pyridine (CAS 887570-96-9)
- (2R,3R)-3-((tert-butoxycarbonyl)amino)bicyclo[2.2.1]Heptane-2-carboxylic acid (CAS 1212474-65-1)
- 2-{4-[(4-chlorophenyl)methyl]piperazin-1-yl}pyridine-3-carboxylic acid hydrochloride (CAS 1235439-09-4)
- D-Pro37-Tirzepatide (CAS CATO-CPTD788902)
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