Pranlukast Impurity 3 CAS 70977-72-9
| CAS No. | 70977-72-9 |
| Molecular Formula | C8H9NO2 |
| Molecular Weight | 151.16 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Pranlukast Impurity 3.
Pranlukast Impurity 3 (CAS 70977-72-9) is a certified pharmaceutical impurity reference standard with the molecular formula C8H9NO2 and a molecular weight of 151.16 g/mol.
The molecular framework of Pranlukast Impurity 3 (C8H9NO2) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C8H9NO2 |
| Molecular Weight | 151.16 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Nitrogen Atoms | 1 |
Related Pranlukast Standards
- Pranlukast Impurity 7 (CAS CATO-C4X-18047)
- Pranlukast Impurity 8 (CAS CATO-C4X-18048)
- Pranlukast Impurity 10 (CAS CATO-C4X-180410)
- Pranlukast Impurity 11 (CAS 136450-05-0)
- Pranlukast impurity 12 (CAS CATO-C4X-180412)
- Pranlukast Impurity 3 Hydrochloride (CAS 90005-55-3)
- Pranlukast Impurity 5 (CAS CATO-C4X-18045)
- Pranlukast Impurity N1 (CAS 136450-11-8)
Recommended Standards
- Zonisamide Impurity 13 (CAS 1196-29-8)
- Procaterol Impurity 11 (CAS 103-01-5)
- Tranexamic Acid EP Impurity D (CAS 56-91-7)
- Bosutinib Impurity 34 (CAS 621-42-1)
- Palbociclib Impurity 45 (CAS 1439-36-7)
- Rifaximin EP Impurity H (CAS 1210022-90-4)
- Calcipotriol Impurity 32 (CAS 87407-51-0)
- 3-[(2-fluorophenyl)methyl]-2,3-dihydro-1,3-thiazol-2-imine hydrochloride (CAS 1052551-96-8)
- 1-Cyclohexyl-N,N'-diethyl-1-methylsilanediamine (CAS 1352486-81-7)
- 3-(tert-Butyl)-4-(methylthio)phenol (CAS 1243396-94-2)
- 2,4-Dinitrofluorobenzene-d (CAS 228719-18-4)
- (R)-Citalopram-d6 Oxalate (CAS 1217768-91-6)
- 5-acetyl-1H-pyrrole-2-carboxylic acid (CAS 635313-65-4)
- D-[Phe]6-Liraglutide (CAS CATO-C4X-199235)
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