Nicotine sulfate with a concentration of 40% can be purchased from various suppliers, including agricultural supply stores, online retailers specializing in agricultural chemicals, and companies that cater to pesticide products. This formulation of nicotine sulfate is commonly used as a pesticide in agriculture to control pests on crops. When purchasing and handling nicotine sulfate, it's important to follow all safety guidelines and local regulations to ensure safe use and storage. 40% concentration of nicotine sulfate is available from a number of vendors, including as pesticide product providers, online retailers specializing in agricultural chemicals, and agricultural supply stores. In agriculture, this particular formulation of nicotine sulfate is frequently applied as a pesticide to manage vermin on crops. To guarantee safe usage and storage of nicotine sulfate, it's crucial to abide by all local laws and safety precautions when handling and purchasing the substance.