(S)-(-)-Timolol Maleate CAS 50929-98-1
| CAS No. | 50929-98-1 |
| Molecular Formula | 2*C13H24N4O3S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
(S)-(-)-Timolol Maleate (C13H24N4O3SC4H4O4) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
CATO supplies (S)-(-)-Timolol Maleate (CAS 50929-98-1), a certified reference material (molecular formula C13H24N4O3SC4H4O4, MW 432.49 g/mol) for analytical method development and quality control.
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.
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 | 2*C13H24N4O3S C4H4O4 |
| Molecular Weight | 432.49 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1971 |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Related S Standards
- Timolol EP Impurity E (CAS 1026075-53-5)
- Timolol EP Impurity C (CAS 1391068-18-0)
- Timolol EP Impurity B（S-Isomer) (CAS 158636-96-5)
- Timolol EP Impurity H (CAS 158636-97-6)
- r-tImolol 2-butenedioate (CAS 1820576-27-9)
- Timolol Impurity 16 (CAS 214691-24-4)
- Timolol EP Impurity I (CAS 2469037-77-0)
- Timolol (CAS 26839-75-8)
Recommended Standards
- 1,3-Benzothiazole-5-sulfonyl chloride (CAS 227278-83-3)
- 2-Iodo-N,N,N-trimethylethan-1-aminium (CAS 44519-11-1)
- Pentacyclo[4.3.0.02,5.03,8.04,7]nonane-4-carboxylic acid (CAS 15844-05-0)
- 1-((4-Fluorophenyl)sulfonyl)pyrrolidine-3-carboxylic acid (CAS 1171916-98-5)
- 1-(2,8-Dimethyl-8H-pyrazolo[1,5-b]indazol-3-yl)ethanone (CAS 61322-51-8)
- 4-(3-Cyclopropyl-1,2,4-oxadiazol-5-yl)benzoic acid (CAS 1165931-66-7)
- N-(2-Hydroxybenzoyl)-L-aspartic Acid (CAS 56145-94-9)
- 4,5,6,7-Tetrahydro-1,3-benzothiazol-2-ylmethanamine (CAS 651706-15-9)
- 1,3-Bis(4-methoxyphenyl)isobenzofuran (CAS 6306-97-4)
- Insulin Degludec Impurity 2 (CAS CATO-C4X-21572)
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