Tizanidine impurity 28 CAS CATO-C4X-144528
| CAS No. | CATO-C4X-144528 |
| Molecular Formula | C6HCl2N3O2S |
| Molecular Weight | 250.06 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Tizanidine impurity 28 (CAS CATO-C4X-144528) is a certified pharmaceutical impurity reference standard with the molecular formula C6HCl2N3O2S and a molecular weight of 250.06 g/mol.
Structurally, Tizanidine impurity 28 (C6HCl2N3O2S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 250.06 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C6HCl2N3O2S |
| Molecular Weight | 250.06 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Tizanidine Standards
- Tizanidine Impurity 41 (CAS CATO-C4X-144541)
- Tizanidine Impurity 42 (CAS CATO-C4X-144542)
- Tizanidine (CAS 51322-75-9)
- Tizanidine impurity 25 (CAS CATO-C4X-144525)
- Tizanidine impurity 31 (CAS CATO-C4X-144531)
- Tizanidine EP Impurity B (CAS 51323-05-8)
- Tizanidine impurity 32 (CAS CATO-C4X-144532)
- Tizanidine-D4 (CAS 1188331-19-2)
Recommended Standards
- 7-Iodoimidazo[4,3-b][1,3]thiazole (CAS 208722-53-6)
- Methyl Nonafluorobutyl Ether (mixture of isomers) (CAS 163702-07-6)
- 6-Bromo-3-fluoro-2-(2-methoxyethoxy)pyridine (CAS 2833717-56-7)
- Methyl Perfluoroisobutyl Ether (CAS 163702-08-7)
- Finerenone Impurity 267 (CAS CATO-C4X-2880267)
- Ezetimibe Impurity 74 (CAS CATO-C4X-109874)
- Bumetanide Impurity 22 (CAS CATO-C4X-198622)
- (S)-1-(tert-Butoxycarbonyl)-2-(2-(trifluoromethyl)-benzyl)pyrrolidine-2-carboxylic acid (CAS 1217741-53-1)
- (4-Ethoxyphenyl)(6-methylpyridin-2-yl)methanone (CAS 1187169-97-6)
- trans-Dichlorobis(tri-o-tolylphosphine)palladium(II) (CAS 14219-84-2)
- 2-hydroxy-5-methyl-1,3-thiazole-4-carboxylic acid (CAS 1505865-51-9)
- 4-Chloro-6-hydroxy-2-trifluoromethyl-quinazoline (CAS 870137-70-5)
- 1-(Sec-butyl)-3-methyl-1h-pyrazole-4-carbaldehyde (CAS 1006495-62-0)
- Delta-Sleep Inducing Peptide (CAS 62568-57-4)
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