Chlorpheniramine Related Compound C is used as a pharmaceutical analytical reference standard for testing chlorpheniramine-containing drug substances and products. It is particularly useful in chromatographic methods such as HPLC for the identification and quantitative determination of related impurities.

Its main purpose is to support quality control and impurity testing of chlorpheniramine maleate. It helps analytical laboratories verify that the level of this specified related compound remains within the pharmacopeial limits established for the drug sub

Chlorpheniramine Related Compound C is a specified related compound (impurity) of chlorpheniramine supplied as a USP pharmaceutical primary reference standard.