General Information

Olmesartan Impurities and Olmesartan

Daicel Pharma synthesizes high-quality Olmesartan impurities like 4-(chloromethyl)-5-methyl-2-oxo-1,3-dioxolene, Olmesartan Acid, Olmesartan Dimer Impurity, Olmesartan Ethyl Ester Impurity, Olmesartan: OMJ-2-Ethyl Impurity, and triphenylmethyl chloride, which are crucial in the analysis of the quality, stability, and biological safety of the active pharmaceutical ingredient Olmesartan. Moreover, Daicel Pharma offers custom synthesis of Olmesartan impurities and delivers them globally.

Olmesartan [CAS: 144689-24-7] is a selective angiotensin II receptor antagonist that belongs to the synthetic imidazole derivatives. It is commonly used to treat hypertension and has antihypertensive properties. Olmesartan, similar to other ARBs, can be used as a standalone treatment for hypertension when no comorbidities are present.

Olmesartan: Use and Commercial Availability  

Olmesartan is a medicine used to treat hypertension alone or combined with other antihypertensive agents. It has also managed Type 2 Diabetes-associated nephropathy, heart failure, and post-myocardial infarction in patients who cannot tolerate ACE inhibitors. Azor, Benicar, Benicar Hct, and Tribenzor are some brand names of Olmesartan.

Olmesartan Structure and Mechanism of Action

The chemical name of Olmesartan is 4-(1-Hydroxy-1-methylethyl)-2-propyl-1-[[2′-(2H-tetrazol-5-yl)[1,1′-biphenyl]-4-yl]methyl]-1H-imidazole-5-carboxylic acid. Its chemical formula is C₂₄H₂₆N₆O_3, and its molecular weight is approximately 446.5 g/mol.

Olmesartan blocks the vasoconstrictor effects of angiotensin II by selectively preventing the binding of angiotensin II to the AT₁ receptor in vascular smooth muscle.

Olmesartan Impurities and Synthesis

Olmesartan impurities form during the synthesis¹, storage, or degradation. Common impurities found in Olmesartan include related substances, degradation products, and residual solvents. The impurities occur due to the reaction of Olmesartan with moisture, acids, bases, or other reactive species. The formation of impurities affects the drug’s stability, purity, and efficacy. Hence, strict control measures are necessary to ensure the quality of Olmesartan’s finished product.

Daicel offers a Certificate of Analysis (CoA) from a cGMP-compliant analytical facility for Olmesartan impurity standards, 4-(chloromethyl)-5-methyl-2-oxo-1,3-dioxolene, Olmesartan Acid, Olmesartan Dimer Impurity, Olmesartan Ethyl Ester Impurity, Olmesartan: OMJ-2-Ethyl Impurity, and triphenylmethyl chloride. The CoA includes complete characterization data, such as 1H NMR, 13C NMR, IR, MASS, and HPLC purity². We also provide 13C-DEPT and CHN if requested. We give a complete characterization report on delivery. Daicel has the technology and expertise to prepare any unknown Olmesartan impurity or degradation product.