Thermal and Physical Data for Concentrated Brine from RO Thermal and Physical Data for Concentrated Brine from RO stanier (Mechanical) (OP) 14 Apr 14 23:08 I am seeking information on a NACL concentrated brine solution . Density, viscosity, vapour pressure & bulk modulus vs. temperature. Properties are required for a fluid with 25% by weight salt.ie density ~ 1200kg/m3. Data in SI Units preferred. “The beautiful thing about learning is that no one can take it away from you.” ---B.B. King http://waterhammer.hopout.com.au/ RE: Thermal and Physical Data for Concentrated Brine from RO bimr (Civil/Environmental) 15 Apr 14 21:42 For practical purposes, the brine will be similar to a 25% sodium chloride solution. http://www.engineeringtoolbox.com/sodium-chloride-... The exact brine composition will depend on the raw water properties, but the sodium chloride solution will not be that far off. The ideal RO temperature used to be stated as 77 Degrees F, but the temperature may be slightly lower depending on the RO membrane application, but generally above 55 Degrees F.