Linagliptin EP Impurity F is used as a pharmaceutical reference standard for impurity testing analytical method validation and quality control during the manufacturing of linagliptin.

Its purpose is to detect identify and quantify Impurity F in linagliptin drug substances and finished pharmaceutical products to ensure compliance with European Pharmacopoeia (EP) and regulatory quality requirements.

Linagliptin EP Impurity F is a specified related substance described in the European Pharmacopoeia (EP) for linagliptin and is used as a certified reference impurity in pharmaceutical analytical laboratories rather than as an active pharmaceutical ingredient.