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  • CAT Number DCTI-C-1303
  • CAS Number 80841-78-7
  • Molecular Formula C5H5ClO3
  • Molecular Weight 148.54

Olmesartan Acid

  • CAT Number DCTI-C-074
  • CAS Number 144689-24-7
  • Molecular Formula C24H26N6O3
  • Molecular Weight 446.51

Olmesartan Dimer Impurity

  • CAT Number DCTI-C-116
  • CAS Number 1040250-19-8
  • Molecular Formula C48H50N12O5
  • Molecular Weight 875.01

Olmesartan Ethyl Ester Impurity

  • CAT Number DCTI-C-073
  • CAS Number 144689-23-6
  • Molecular Formula C26H30N6O3
  • Molecular Weight 474.57

Olmesartan: OMJ-2-Ethyl Impurity

  • CAT Number DCTI-C-690
  • CAS Number NA
  • Molecular Formula C47H42N6O6
  • Molecular Weight 786.89

Triphenylmethyl chloride

  • CAT Number DCTI-C-1264
  • CAS Number 76-83-5
  • Molecular Formula C19H15Cl
  • Molecular Weight 278.78

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 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 C24H26N6O3, 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.


Frequently Asked Questions

Olmesartan impurities occur from many sources, such as the starting materials, manufacturing, and storage conditions.

Olmesartan impurities can potentially pose a risk to patient health, as these impurities may have toxic or carcinogenic properties in the finished product.

Methanol is a solvent that analyzes most of the Olmesartan impurities.

Olmesartan impurities are stored at a controlled room temperature between 2-8 ⁰C or as indicated on the Certificate of Analysis (CoA).

Note: Products protected by valid patents by a manufacturer are not offered for sale in countries having patent protection. The sale of such products constitutes a patent infringement, and its liability is at the buyer's risk.

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