Sodium Cromoglicate Impurity 21 CAS CATO-C4X-201121
| CAS No. | CATO-C4X-201121 |
| Molecular Formula | C30H32O11 |
| Molecular Weight | 568.57 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Sodium Cromoglicate Impurity 21 is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies Sodium Cromoglicate Impurity 21 (CAS CATO-C4X-201121), a pharmacopoeial impurity reference standard (molecular formula C30H32O11, MW 568.57 g/mol) used for the identification and quantification of trace impurities in APIs.
Sodium Cromoglicate Impurity 21 (C30H32O11) contains a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system. 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).
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.
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 | C30H32O11 |
| Molecular Weight | 568.57 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 methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Sodium Standards
- Sodium Cromoglicate Impurity 29 (CAS CATO-C4X-201129)
- Sodium Cromoglicate Impurity 23 (CAS CATO-C4X-201123)
- Cromoglicate EP Impurity B (CAS 16150-45-1)
- Sodium Cromoglicate Impurity 15 (CAS 149992-30-3)
- Sodium Cromoglicate Impurity 4 (CAS CATO-C4X-20114)
- Cromoglicate Lisetil (CAS 110816-79-0)
- Sodium Cromoglicate Impurity 22 (CAS CATO-C4X-201122)
- Sodium Cromoglicate Impurity 11 (CAS 16110-51-3)
Recommended Standards
- [(2R,3R,4R,5R,6R)-5-acetamido-3,4-diacetoxy-6-[2-[2-(benzyloxycarbonylamino)ethoxy]ethoxy]tetrahydropyran-2-yl]methyl acetate (CAS 1261568-35-7)
- 1,1,1-Tris(diphenylphosphino)methane (CAS 28926-65-0)
- N-Nitroso Apramycin (CAS CATO-C4X-30841)
- Linagliptin Impurity 77 (CAS 1673546-62-7)
- Atracurium Impurity 21 (CAS CATO-C4X-185021)
- Proxyphylline impurity 10 (CAS CATO-C4X-244010)
- Safinamide Impurity 58 (CAS CATO-C4X-159058)
- Fmoc-(R)-3-amino-4-(3-pyridyl)-butyric acid (CAS 269396-66-9)
- Galanthamine Impurity 29 (4aS,6S,8aS) (CAS CATO-C4X-143529)
- 1-(1-Ethyl-1h-benzo[d]imidazol-2-yl)ethan-1-amine (CAS 1082308-02-8)
- 2-(2-Bromo-6-methoxyphenyl)acetic acid (CAS 93710-57-7)
- Ethyl 2-(2-((2,6-dichlorobenzyl)sulfonyl)-4,5-diphenyl-1H-imidazol-1-yl)acetate (CAS 339277-42-8)
- (2-Fluoro-6-propylpyridin-3-yl)boronic acid (CAS 2225175-66-4)
- Semaglutide impurity 237 (CAS CATO-C4X-2226237)
Why CATO?
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- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com