Any person who sells, offers to sell or displays for sale any portable fire extinguisher or any flame-proofing or fire retardant coating or compound, unless such fire extinguisher, coating or compound has been tested, listed and rated as satisfactory for its intended purpose by a nationally recognized testing laboratory acceptable to the State Fire Marshal and, in the case of a fire extinguisher, unless such fire extinguisher contains no active agent having an ingredient prohibited by section 29-313, shall be subject to the penalties prescribed in section 29-291c.