calgonit MC 958 is a general purpose Phosphorous-free antisca- lant that protects against scale formation in reverse osmosis sys- tems. calgonit MC 958 inhibits formation of all carbonate and phosphate scales, also sulfate scales at extreme super satura- tions. The product also exhibits control of reactive silica at low to moderate levels. calgonit MC 958 is able to disperse colloidal particles such as silt, clay and colloidal silica, effectively stabilizes metal ions and disperses metal hydroxides. calgonit MC 958 is sui- table for use in a range of feedwater sources, including brackish-, waste- and seawater. The product must be continuously applied to provide full system protection. � Effective antiscalant � Compatible with most leading reverse osmosis (RO) and nano- filtration (NF) membranes � Based on high-performance polymer � Phoshphorus-free � Low operating costs