PD-85839 is a potent and selective sodium channel blocker. It binds specifically to a local anesthetic receptor site on the Na+ channel alpha subunit that is allosterically linked to neurotoxin receptor site 21. PD-85639 is a novel and useful molecular probe of this important drug receptor site. Product Specification MW:364.5 CAS:150034-24-5 Purity:98% Long Term Storage:Ambient