Comply with the ANSI/NSF Standard 60 standard; Effectively applied to the DOW Chemical Companys Filmtec membranes & the Nitto Denko companys RO membranes; Compatible with organic flocculants and ST Suitable for water with high hardness, high alkaline. Effectively control the deposition of carbonate, sulfate,calcium fluoride & dispersed metal oxide on the surface of the membrane.LSI in the concentrated water is up to 2.78 without scale formation. pH range: 5.0-9.0