For a supplier of pure nicotine extract, you can consider reputable companies like Nicotine India, Alchem International, or Inovogen Life Sciences. These companies specialize in providing high-quality nicotine products for various industries, including pharmaceuticals, agriculture, and vaping. Verify the credentials and reputation of the supplier before making a purchase to ensure reliability and product quality. Additionally, adhere to all safety guidelines for handling and using pure nicotine extract, as it is a potent substance.