Pharmaceutical Impurities - Residual Alkylating Agents

Alkylating agents

The analysis of alkylating agents is required in fields such as environmental studies, chemical weapons, toxicology, oncology, and pharmaceutical quality control.

What is an Alkylating agent?

An alkylating agent is a compound that substitutes an alkyl group, CnH2n+1, for an active hydrogen atom in an organic compound. All of the alkylating agents form strong electrophiles through the formation of carbonium ion intermediates . This results in the formation of covalent linkages by alkylation of various nucleophile moieties. The chemotherapeutic and cytotoxic effects are directly related to the alkylation of DNA. The formation of one covalent bond with nucleophiles can result in mutagenesis or teratogenesis but the formation of two of these bonds through cross-linking can produce cytotoxicity.

As a result of this interaction, it is extremely important to have solid proof that all employed alkylating reagents are removed prior to producing the Active Pharmaceutical Ingredient and/or the Drug Product.

The determination of residual alkylating reagents in pharmaceuticals is currently attracting the interest of the regulatory authorities, both in Europe and in the United States. Although guidelines have not yet been established, concentrations are generally limited to values in the ppm (ug/g) range, and information in the low ppb (ng/g) is highly desirable.

Atlantic Analytical is well positioned and very capable of developing and validating methods to GLP and GMP standards for low ppb LOQ’s of residual alkylating agents.