A phosphate-phosphonate compound which is lowly volatile, has a high phosphorus content, and does not influence various properties of a product when used as a material therefor. The system has an input device through which a user can select a particular information object to be processed. The method also includes identifying one or more finalization actions that are available for finalizing the check-in procedure based on the check-in workflow status. The second sidewalls are inclined relative to the first sidewalls.