Beta-cyfluthrin is a highly soluble and moderately volatile insecticide used for agricultural and household applications

Beta-cycluthrin is a member of a family of synthetic phytochemicals called citrus sulfur compounds. These compounds are often used in the production of insecticides, although the name 'beta-cycluthrin' is somewhat misleading as it does not contain sulfur. It is a strong antioxidant that is very effective in eliminating microorganisms and is used in a wide range of agricultural applications. The insecticide has low toxicity to humans and animals, although prolonged or repeated exposure may be toxic. For instance, in April 2020, the European Food Safety Authority (EFSA) initiated field dissipation studies across Germany, France, and Spain for sample analysis of beta-cyfluthrin isomers on barren soil plots.

When exposed to or come in contact with beta-cycluthrin it attaches to the nerve cell through a protein receptor. This triggers over-stimulation of brain cells and impairment of vital functions, including movement and feeding, leading to quick death of the pest by other means. Imidacloprid, the most commonly used commercial insecticide containing this chemical, is one of the most toxic substances known. It causes neurological damage and is a strong neurotoxin.

Many low doses of beta-cyfluthrin do not produce any symptoms in laboratory animals, including ingestion and inhalation. In the case of acute toxicity, acute exposure occurs during an attack. Some species of insects are more sensitive than others to the chemical. Laboratory evidence suggests that even low concentrations of beta-cyfluthrin can cause depression, seizures and in some cases coma and death in laboratory animals.

 To prevent the serious side-effects of beta-cyfluthrin, many manufacturers label their products with a warning not to be ingested and for humans, a precautionary statement similar to a 'Do Not ingest' warning. Products designed for use outdoors should not be exposed to areas where they are likely to come in contact with vehicles, pets, children or other people. Exterior surfaces on exposed items should be wiped clean with a mild detergent and mild disinfectant, such as half-and-half. Any item that can hold liquid should be placed in a plastic garbage bag prior to disposal. Products that are intended for use indoors should only be stored in airtight containers. Products for use outside should be stored away from reach or use, and children should be supervised when applying or handling them.