Sodium polytungstate (SPT) is perfect for preparation of heavy liquids. Carl ROTH offers an environmentally friendly alternative to using zinc chloride and mercury saline solutions or highly toxic halogenated hydrocarbons to conduct the sink or swim analyses required for density determination. Properties: Highly water soluble pH-neutral solution Maximum achievable density of the solution is 3,1 g/cm³ at 25 °C Advantages: Non-toxic Non-flammable Odourless Low viscosity Easy to use Extremely easy to clean the sinks and floats with water Environmentally friendly Mass of SPT used [g] Mass of H 2 O [g] End volume of solution [ml] Concentration c in [wt.-%] Density p [g/cm 3 ] Viscosity η [mPa•s] 5,00 48,80 50 9,3 1,08 0,99 10,00 47,66 50 17,3 1,15 1,05 15,08 46,63 50 24,4 1,23 1,13 20,00 45,87 50 30,4 1,32 1,19 25,02 44,98 50 35,7 1,40 1,29 35,01 42,94 50 44,9 1,56 1,51 45,15 41,10 50 52,3 1,73 1,83 55,01 38,93 50 58,6 1,88 2,27 65,17 36,99 50 63,8 2,04 2,90 75,00 34,68 50 68,4 2,19 3,93 85,00 32,54 50 72,3 2,35 5,15 95,00 30,10 50 75,9 2,50 8,19 105,01 28,42 50 78,7 2,67 12,18 115,01 25,92 50 81,6 2,82 20,55 125,12 23,72 50 84,1 2,98 36,65 133,00 22,00 50 85,8 3,10 59,52 Sodium polytungstate hydrate ≥99,9 %