Calcium Dobesilate Impurity 19 CAS 17724-07-1
| CAS No. | 17724-07-1 |
| Molecular Formula | C6H6O5S |
| Molecular Weight | 190.17 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Calcium Dobesilate Impurity 19 (C6H6O5S) contains a carbohydrate-derived structure, a sulfone group. 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).
Calcium Dobesilate Impurity 19 (CAS 17724-07-1) is a certified pharmaceutical impurity reference standard with the molecular formula C6H6O5S and a molecular weight of 190.17 g/mol.
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 | C6H6O5S |
| Molecular Weight | 190.17 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Sulfur Atoms | 1 |
Related Calcium Standards
- Calcium Dobesilate Impurity N2 (CAS 35857-70-6)
- Calcium Dobesilate Impurity N5 (CAS 7134-09-0)
- Calcium Dobesilate Impurity N1 (CAS 6409-58-1)
- Calcium Dobesilate Impurity 3 (CAS CATO-C4X-20513)
- Calcium Dobesilate Impurity 2 (CAS CATO-C4X-20512)
- Calcium Dobesilate Impurity 23 (CAS CATO-C4X-205123)
- Calcium Dobesilate Impurity 4 (CAS 2429952-20-3)
- Calcium Dobesilate Impurity 26 (CAS CATO-C4X-205126)
Recommended Standards
- Hydroquinonesulfonic Acid (Dobesilic Acid) (CAS 88-46-0)
- 4-Amino-3-Hydroxypyridine Sulfate (CAS 100130-15-2)
- 1-(3-Fluoro-phenyl)-1H-pyrazole-4-carbaldehyde 1-(3-fluorophenyl)-1H-pyrazole-4-carbaldehyde 936940-82-8 A11033 (CAS 936940-82-8)
- 4-sulfamoyl-1H-pyrrole-2-carboxylic acid (CAS 1042556-50-2)
- Glyceryl Trinitrate Impurity 7 (CAS 861542-51-0)
- Cefaclor Impurity 70 (CAS CATO-C4X-127070)
- Nafamostat Impurity 36 (CAS 765871-54-3)
- methyl 4-fluoropiperidine-4-carboxylate (CAS 862401-47-6)
- Trans-2-((4,5-diphenyloxazol-2-yl)methyl)cyclohexanamine (CAS 89004-16-0)
- 1-((2,4-Dichloro-5-methylphenyl)sulfonyl)-4-methoxypiperidine (CAS 1234973-10-4)
- 2-Chloro-n-hydroxybenzene-1-carbonimidoyl chloride (CAS 29568-74-9)
- 1-(Thieno[3,2-c]pyridin-2-yl)ethan-1-ol (CAS 1313726-87-2)
- 4-Amino-6-chloro-7-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-7H-pyrrolo[2,3-d]pyrimidine-5-carboxamide (CAS 73210-49-8)
- Semaglutide impurity 208 (CAS CATO-C4X-2226208)
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