Nicotine Sulphate 40% refers to a nicotine compound where the nicotine content is 40% by weight. It is commonly used as an insecticide in agriculture to control pests. Nicotine sulphate is known for its effectiveness against a wide range of insects, making it a popular choice among farmers and gardeners. However, it's important to handle it with care and follow safety guidelines, as nicotine sulphate can be toxic to humans and other non-target organisms. It should be used strictly according to label instructions and in accordance with local regulations regarding pesticide use.