It is well known that column dimensions, manufacturer, and type influence the retention times of all compounds that transit that column. In the RepoRT dataset, these parameters were collected and standardized from publications and manufacturer libraries, meaning that this data could be used as descriptors for model learning. For the columns themselves, we include descriptions of several important column parameters including the column dimensions (e.g., length inner diameter, particle size) in standardized units, the dead/void volume in minutes, and the temperature in degrees Kelvin. We provide one hot description of the column manufacturer (e.g., Thermofisher, Phenomenex), and USP code. If a column parameter was not provided in the original study, we encode that value as a zero.