Innophos Phosphoric Acid

Innophos Phosphoric AcidTable 9Density 1 of Phosphoric Acid (over 60% H 3 PO 4 ) (19)ConcentrationDensity (g./cc.) at indicatedpercent by weight temperatures, °CH 3 PO 4 P2O5 25 30 40 50 75 100 125 15060.75 44 1.428 1.424 1.418 1.411 1.394 1.377 1.360 1.34363.51 46 1.457 1.453 1.446 1.439 1.422 1.405 1.387 1.3766.28 48 1.486 1.482 1.475 1.468 1.450 1.432 1.415 1.39769.04 50 1.515 1.511 1.504 1.497 1.478 1.460 1.442 1.42471.80 52 1.544 1.540 1.533 1.515 1.507 1.488 1.469 1.45174.56 54 1.573 1.569 1.562 1.554 1.535 1.516 1.497 1.47877.32 56 1.602 1.598 1.590 1.583 1.563 1.544 1.524 1.50580.08 58 1.631 1.627 1.619 1.611 1.591 1.572 1.552 1.53282.84 60 1.660 1.656 1.648 1.640 1.620 1.599 1.578 1.55985.61 62 1.693 1.689 1.681 1.673 1.653 1.633 1.613 1.59388.37 64 1.725 1.722 1.714 1.706 1.686 1.667 1.647 1.62791.13 66 1.758 1.754 1.746 1.739 1.719 1.700 1.681 1.66191.58 66.33 1.763 1.760 1.752 1.744 1.725 1.706 1.686 1.66793.89 68 1.791 1.787 1.779 1.772 1.753 1.734 1.715 1.69696.65 70 1.823 1.820 1.812 1.805 1.786 1.767 1.748 1.7399.41 72 1.856 1.852 1.845 1.838 1.819 1.801 1.782 1.764100.00 72.43 1.863 1.859 1.852 1.845 1.826 1.808 1.789 1.771102.17 74 1.889 1.885 1.878 1.871 1.852 1.834 1.816 1.798104.94 76 1.921 1.918 1.911 1.903 1.886 1.868 1.850 1.832107.70 78 1.954 1.950 1.943 1.936 1.919 1.901 1.884 1.866110.12 79.76 1.983 1.979 1.972 1.965 1.948 1.931 1.914 1.896110.46 80 1.987 1.983 1.976 1.969 1.952 1.935 1.918 1.900113.22 82 2.019 2.016 2.009 2.002 1.985 1.968 1.951 1.934115.98 84 2.052 2.049 2.042 2.035 2.019 2.002 1.985 1.969118.74 86 2.084 2.081 2.075 2.068 2.052 2.035 2.019 2.003122.52 88.74 2.129 2.126 2.12 2.113 2.097 2.081 2.065 2.0491 Densities of 1-60 percent H 3 PO 4 are taken from the International Critical Tables (130). (See Table 7)Densities of 60.75-82.84 percent H 3 PO 4 were calculated from the equation.

p ’ = a - bt = (0.7972 + 0.01472a) - (3.30x 10 -4 + 8.00 x 10 -6 a)t and densities of 85.61-122.52 percent H 3 PO 4were calculated from the equation,p ” = a - bt = (0.7102 + 0.01617a) - (11.7 x 10 -4 - 6.00 x 10 -6 a)twhere a is the extrapolated value for the density at 0°C.; b is the coefficient of cubical expansion of the acids(graphical treatment of the density data showed that b is maximum for acids containing about 60 percentP 2 O 5 ); a is the weight percentage of P 2 O 5 in the acid; and t is the temperature, °C., from 25° to 160°.