Topiroxostat Impurity 3 CAS 13602-12-5
| CAS No. | 13602-12-5 |
| Molecular Formula | C6H5NO3 |
| Molecular Weight | 139.11 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Topiroxostat Impurity 3 is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 139.11 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Topiroxostat Impurity 3 (CAS 13602-12-5) is a certified pharmaceutical impurity reference standard with the molecular formula C6H5NO3 and a molecular weight of 139.11 g/mol.
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 | C6H5NO3 |
| Molecular Weight | 139.11 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1960 |
| Nitrogen Atoms | 1 |
Related Topiroxostat Standards
- Topiroxostat Impurity 4 (CAS 2459-09-8)
- Topiroxostat Impurity 47 (CAS 93-60-7)
- Topiroxostat Impurity 6 (CAS 54-85-3)
- Topiroxostat Impurity 33 (CAS 89830-71-7)
- Topiroxostat Impurity 36 (CAS 35451-46-8)
- Topiroxostat impurity 74 (CAS CATO-C4X-105574)
- Topiroxostat Impurity 51 (CAS 98273-47-3)
- Topiroxostat Impurity 45 (CAS 161233-97-2)
Recommended Standards
- 2-carboxypyridine 1-oxide (CAS 824-40-8)
- Acetaminophen EP Impurity F (CAS 100-02-7)
- 6-Hydroxy-2-pyridinecarboxylic Acid (CAS 19621-92-2)
- 3-Carbamoylpyrazine 1-oxide (CAS 768-36-5)
- Safinamide Impurity 37 (CAS 1000370-27-3)
- Pheniramine Impurity 1 (CAS 14155-36-3)
- Dotinurad Impurity 38 (CAS CATO-C4X-249438)
- 5'-Nitro-[1,1':3',1''-terphenyl]-3,3'',5,5''-tetracarboxylic acid (CAS 2235382-00-8)
- Ethyl 3-(chlorosulfonyl)-5-(methoxymethyl)benzoate (CAS 1154568-86-1)
- 2-Cyclopropoxy-1-fluoro-4-iodobenzene (CAS 1243454-59-2)
- 5-(1-Aminoethyl)-N-(4-(trifluoromethyl)phenyl)thiazol-2-amine (CAS 1095824-42-2)
- Cis-2-((4,5-diphenyloxazol-2-yl)methyl)cyclohexanamine (CAS 89004-20-6)
- Methyl (2R,3S)-3-(4-bromophenyl)-2-methylbutanoate (CAS 2079925-26-9)
- Semaglutide Impurity 187 (CAS CATO-C4X-2226187)
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