Valacyclovir Impurities

General Information

Valacyclovir Impurities and Valacyclovir

Daicel Pharma is a trusted provider of quality Valacyclovir impurity standards, including Bis Valacyclovir and Bis Valacyclovir mono valine. These impurities are crucial in meticulously evaluating the quality, stability, and safety of the active pharmaceutical ingredient, Valacyclovir. Furthermore, Daicel Pharma specializes in the custom synthesis of Valacyclovir impurities, guaranteeing that individual client specifications are met with precision. With global shipping capabilities, their delivery to customers worldwide is possible.

Valacyclovir [CAS: 124832-26-4] is an antiviral medicine, a nucleoside analog DNA polymerase inhibitor. It acts as a prodrug of acyclovir and treats infections caused by the herpes simplex and varicella-zoster viruses.

Valacyclovir: Use and Commercial Availability    

Valacyclovir is an ester prodrug, an L-valine ester of acyclovir, that treats herpes, varicella zoster, and cytomegaloviruses. It is also effective in suppressing recurrent episodes of genital herpes. Valacyclovir is available under the brand name Valtrex.

Valacyclovir Structure and Mechanism of Action 

The chemical name of Valacyclovir is 2-[(2-Amino-6-oxo-3H-purin-9-yl)methoxy]ethyl (2S)-2-amino-3-methylbutanoate. Its chemical formula is C₁₃H₂₀N₆O₄, and its molecular weight is approximately   324.34 g/mol.

Valacyclovir converts to acyclovir, which inhibits viral DNA polymerase and incorporates and terminates the viral DNA chain. It inactivates viral DNA polymerase.

Valacyclovir Impurities and Synthesis 

Valacyclovir impurities can arise during synthesis¹ due to storage or using specific raw materials and intermediates in manufacturing. They encompass related compounds, degradation products, and process impurities. Stringent quality control measures and analytical methods are crucial to ensure the purity and safety of Valacyclovir for patient use.

Daicel provides a comprehensive Certificate of Analysis (CoA) for Valacyclovir impurity standards, such as Bis Valacyclovir and Bis Valacyclovir mono valine. The CoA includes detailed characterization data such as 1H NMR, 13C NMR, IR, MASS, and HPLC purity². Additionally, upon delivery, we give 13C-DEPT. Daicel possesses the technology and expertise to synthesize any unknown Valacyclovir impurity or degradation product.