Montelukast EP Impurity B CAS 918972-54-0
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 918972-54-0 |
| Molecular Formula | C35H34ClNO2S |
| Molecular Weight | 568.17 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Montelukast EP Impurity B (CAS 918972-54-0), a pharmacopoeial impurity standards reference standard manufactured under ISO 17034 accreditation. Molecular formula: C35H34ClNO2S. Molecular weight: 568.17 g/mol. Batch-specific COA and technical support are available on request.
Physical & Chemical Properties
| Molecular Formula | C35H34ClNO2S |
| Molecular Weight | 568.17 g/mol |
| Purity | >95% |
| Storage | Store at room temperature, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 19.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Montelukast Standards
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- Montelukast EP Impurity F (CAS 937275-23-5)
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- Montelukast Impurity 2 (CAS CATO-C4X-10312)
- Montelukast Amide (CAS 866923-63-9)
- Montelukast EP Impurity H (CAS 851755-56-1)
- Montelukast Impurity 24 (CAS CATO-C4X-103124)
- Montelukast (CAS 158966-92-8)
Recommended Standards
- 2-Propenoic acid, 3,3,4,4,5,5,6,6,7,7,8,8,9,10,10,10-hexadecafluoro-9-(trifluoromethyl)decyl ester, homopolymer (CAS 31214-91-2)
- 2,2'-Diiodo-9,9'-spirobi[fluorene] (CAS 790674-48-5)
- 2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-Nonadecafluorodecyl methacrylate (CAS 23069-32-1)
- Aciclovir EP Impurity J (CAS 166762-90-9)
- Tofacitinib Impurity 79 (CAS 16372-08-0)
- 2-Bromo-4,6-dimethyl-nicotinonitrile (CAS 610279-99-7)
- 1-(3-Chloro-4-{[5-(trifluoromethyl)pyridin-2-yl]oxy}phenyl)-3-{1-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]-1H-pyrrole-2-carbonyl}thiourea (CAS 338420-78-3)
- (D-Tyr6,βPhe11,Phe13,Nle14)-Bombesin (6-14) (free acid) trifluoroacetate salt (CAS 1053627-10-3)
- 3-[2-Bromo-4-(1-methyl-1-phenylethyl)phenoxy]-azetidine (CAS 1219981-31-3)
- Liraglutide Impurity 17 TFA Salt (CAS CATO-C4X-199217)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 13829788188 / jacky.chen@cato-chem.com