From NJ School IPM manual: "Minimum risk" pesticides. The following lists "active" ingredients (the ingredient with the pesticide value) that are exempt from EPA regulation assuming the product meets certain conditions. If these ingredients are in a product that is properly labeled with all ingredients (both active and "inert"), does not claim to control disease-carrying pests, and does not make false or misleading claims, they are considered "minimum risk" and thus able to be used as a low impact pesticide under the law. Castor oil (U.S.P. or equivalent) Cedar oil Cinnamon and cinnamon oil Citric acid Citronella and citronella oil Cloves and clove oil Corn gluten meal Corn oil Cottonseed oil Dried blood Eugenol Garlic and garlic oil Geraniol Geranium oil Lauryl sulfate Lemongrass oil Linseed oil Malic acid Mint and mint oil Peppermint and peppermint oil 2-Phenethyl propionate (2-phenylethyl propionate) Potassium sorbate Putrescent whole egg solids Rosemary and rosemary oil Sesame (includes ground sesame plant) and sesame oil Sodium chloride (common salt) Sodium lauryl sulfate Soybean oil Thyme and thyme oil White pepper Zinc metal strips (consisting solely of zinc metal and impurities) These active ingredients listed above may be combined with any of a number of "inert" ingredients from a list published by EPA. This list of minimum risk inert ingredients is known as List "4A". The up-to-date 4A list can be obtained from EPA's website.