Sodium Cromoglicate Impurity 15 CAS 149992-30-3
| CAS No. | 149992-30-3 |
| Molecular Formula | C25H20O11 |
| Molecular Weight | 496.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Sodium Cromoglicate Impurity 15 is closely related to a flavonoid core, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
As a process- or degradation-related impurity, Sodium Cromoglicate Impurity 15 (CAS 149992-30-3, C25H20O11) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Owing to a flavonoid core, a hydroxyl group, an ether linkage, Sodium Cromoglicate Impurity 15 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 496.42 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
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 | C25H20O11 |
| Molecular Weight | 496.42 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1999 |
Related Sodium Standards
- Sodium Cromoglicate Impurity 4 (CAS CATO-C4X-20114)
- Cromoglicate EP Impurity B (CAS 16150-45-1)
- Sodium Cromoglicate Impurity 11 (CAS 16110-51-3)
- Sodium Cromoglicate Impurity 3 (CAS CATO-C4X-20113)
- Sodium Cromoglicate Impurity 14 (CAS CATO-C4X-201114)
- Sodium Cromoglicate Impurity 19 (CAS CATO-C4X-201119)
- Sodium Cromoglicate Impurity 20 (CAS CATO-C4X-201120)
- Sodium Cromoglicate Impurity 25 (CAS 40786-63-8)
Recommended Standards
- BAY-876 (CAS 1799753-84-6)
- 4-[2-Methoxy-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-benzenesulfonylamino]-piperidine-1-carboxylic acid tert-butyl ester (CAS 1628017-41-3)
- Letermovir Impurity 72 (CAS CATO-C4X-291572)
- (2S)-2-Amino-3-(6-chloro-1H-indol-3-yl)-1-(5-((5-chloro-1H-indol-3-yl)methyl)hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl)propan-1-one (CAS 2228955-02-8)
- Isavuconazole impurity 79 (CAS CATO-C4X-1236179)
- Dobutamine Impurity 15 (CAS 334947-74-9)
- Bilastine Impurity 13 (CAS 1215537-40-8（free base）)
- 2-(3-(Trifluoromethyl)phenoxy)quinoxaline (CAS 338394-55-1)
- Ethyl 2-(2-nitro-4-(pentafluoro-l6-sulfaneyl)phenyl)acetate (CAS 1394319-50-6)
- Ethyl 4,4,4-trifluoro-3-hydroxy-2-((3-(trifluoromethyl)phenyl)diazenyl)but-2-enoate (CAS 866130-98-5)
- 3-((5-Chloropyridin-2-yl)amino)propanoic acid (CAS 33390-63-5)
- 2,2-Dimethyl-1-(naphthalen-2-yl)propan-1-one (CAS 7270-99-7)
- Bethanidine Sulfate (CAS 114-85-2)
- Cyclopeptide-5 (CAS 197172-76-2)
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