It is Widely used in pre-cast & ready-mixed concrete, armored concrete and pre-stressed reinforced concrete in key construction projects such as dam and port construction, road building & town planning projects and dwelling erections etc. Chemical Compositions: Main ingredient is ¦Ã-naphthyl sulfonate formaldehyde condensate, sodium sulfate¡Ã5.0%. Type: FDN-5 Appearance: yellow beige Water reduction: ¡Ã20% PH Value (10g/L): 7-9 Sodium sulfate(Na2SO4): ¡Ã5.0% We also have: FDN-10 (Na2SO4: 10.0% max.) FDN-20 (Na2SO4: 18.0% max.) FDN-30 (Na2SO4: 20.0% max.)