Pure Nicotine USP/EP 99+ refers to nicotine that meets the standards set by the United States Pharmacopeia (USP) or the European Pharmacopoeia (EP) and has a purity of 99% or higher. This high level of purity ensures that the nicotine is suitable for use in pharmaceutical and other regulated applications. It is commonly used in nicotine replacement therapy (NRT) products, research, and the manufacturing of pharmaceuticals and e-liquids. When purchasing Pure Nicotine USP/EP 99+, it's important to source it from reputable suppliers to ensure quality and compliance with regulatory standards.