25B-NBF is an N-fluorobenzyl derivative of the phenethylamine hallucinogen 2C-B , which acts as a highly potent agonist for the 5-HT2C receptor. 25B-NBF binds human 5-HT2A receptors and rat 5-HT2C receptors with pKi values of 8.57 and 7.73, respectively. This product is intended for forensic and research applications.