These rules, promulgated under authority of the Poison Prevention Packaging Act (PPPA), require child-resistant (CR) packaging for certain products that contain low-viscosity hydrocarbons. (The Commission voted 3-0 to issue this final rule. The statements of Chairman Brown and Commissioners Gall and Moore concerning the vote are available from the CPSC Office of the Secretary.) This requirement is intended to protect children under five years of age from serious injury associated with aspiration of hydrocarbon products. The requirement applies to certain prepackaged nonemulsion-type liquid household chemical products, including drugs and cosmetics, that contain ten (10) percent or more hydrocarbons by weight and have a viscosity of less than one hundred (100) Saybolt Universal Seconds (SUS) at 100 deg.F (covered products). For purposes of these rules, hydrocarbons are defined as compounds that consist solely of carbon and hydrogen. For a product that contains multiple hydrocarbons, the total percentage of hydrocarbons in the product is the sum of the percentages by weight of the individual hydrocarbon components.