Characters Comply with the ANSI/NSF Standard 60 standard; Comply with China drink water certificate; 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,high pH.Effectively control the deposition of carbonate, sulfate,calcium fluoride & dispersed metal oxide on the surface of the membrane; pH range: 5.0-9.0; Physical Properties Appearance:Colorless to Light yellow liquid; Density(20):1.20 ±0.05g/cm3 pH(1.0%):1.5~3.5 Solubility:completely soluble in water