4-Methoxybenzenediazonium Tetrafluoroborate from Mexico

This stable diazonium salt serves as a Sandmeyer reaction intermediate and photoinitiator precursor in polymer chemistry. HTS 2927.00.50.00 covers it as a diazo-compound salt, with classification following the organic diazo component per Chapter 29 note on salts. The tetrafluoroborate counterion doesn't alter the organic compound classification.