... of 5-15mg/L is preferred.Package and Storage:200L plastic drum, IBC(1000L),customers’ requirement. Storage for one year in ... .Synonyms:PBTCA;PBTC;PHOSPHONOBUTANE TRICARBOXYLIC ACID;2-Phosphonobutane -1,2,4-Tricarboxylic Acid;2-Phosphonobutane-1,2,4-tricarboxylic acid PBTC; 2-Phosphonobutane -1,2,4-Tricarboxylic Acid (PBTCA)