Perfluorotetradecanoic acid, n-isomer (major); 50 µg/mL in MeOH with 4 mole eq. NaOH; 1 mL

Perfluorotetradecanoic acid (PFTeDA) is a perfluorinated carboxylic acid commonly used as an analytical standard in environmental testing, particularly for detecting per- and polyfluoroalkyl substances (PFAS). The addition of sodium hydroxide (NaOH) to methanol (MeOH) solutions helps prevent esterification of PFTeDA, maintaining the stability of the standard.