630 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS derivatives, wet point, flow point and sedimentation tests were conducted on the same 12 systems tested in the previous series, substituting isopropyl palmitate for the mineral oil. These data are summarized in Tables XI-XVI. Titanium dioxide: Although the titanium dioxide had a lower wet point in isopropyl palmitate than in mineral oil, no differences in the efficiency of the derivatives were noted between the two vehicles. In the flow point tests, Amerlate P exhibited the same pattern in both vehicles- a sharp decrease at 5% with lesser decreases at the higher concentrations. Although Acetulan and Amerchol L-707 demonstrated better activity in the flow point at 5% and 10% levels in isopropyl palmitate than in mineral oil, these two derivatives again showed a dramatic decrease in this test between 10% and 20%. Table XI Effect of three derivatives on wet point of four powders in isopropyl palmirate Titanium Talc Oxy Red Red No. 9 Additive and concn. dioxide I.P.P. (control) 0.0% 52.3 46.8 41.5 35.3 5.0 43.0 40.5 34.5 31.0 10.0 35.5 35.0 27.5 25.0 20.0 (23.0) (25.0) (16.5) (14.0) 21 oetulan 5.0 38.0 35.5 28.5 29.0 10.0 32.5 22.5 21.0 22.5 20.0 12.4 18.0 5.5 10.5 21merchol L-101 5.0 40.0 39.5 27.5 32.8 10.0 26.5 31.0 19.5 25.5 20.0 12.3 11.5 4.5 15.5 21ruerlate P 5.0 28.5 37.0 19.5 30.5 10.0 24.5 31.5 13.0 22.5 20.0 12.5 12.5 2.5 13.0 Table XII Effect of three derivatives on flow point of four powders in isopropyl palmirate Titanium Talc Oxy Red Red No. 9 Additive and concn. dioxide I.P.P. (control) 0.0% 194.4 215.3 124.6 96.5 5.0 (188.4) (209.3) (118.6) (90.5) 10.0 (182.4) (203.3) (112.6) (84.5) 20.0 (170.4) (191.3) (100.6) (72.5) .4 cetulan 5.0 176.3 210.4 102.5 88.8 10.0 139.0 198.2 84.8 83.1 20.0 34.2 177.5 32.4 68.3 21 merchol L-101 5.0 155.3 197.0 79.9 94.5 10.0 135.4 183.0 56.2 88.5 20.0 62.4 154.8 46.7 71.3 .4 ruerlate P 5.0 76.0 155.9 58.5 87.6 10.0 67.2 134.5 49.6 79.4 20.0 61.5 104.7 41.4 70.9

THE INFLUENCE OF LANOLIN DERIVATIVES 63I Table XlII Effect of three derivatives on sedimentation rate of titanium dioxide in isopropyl palmirate Settling volume (% of total) Settling time No derivative Acetulan Arnerchol L-101 Arnerlate P 10 min 74.4 89.8 100.0 100.0 20 ,, 62.2 81.7 100.0 100.0 30 ,, 47.6 73.2 100.0 100.0 40 ,, 39.0 65.8 100.0 100.0 60 ,, 32.4 50.0 100.0 100.0 90 ,, 30.0 32.4 100.0 93.9 120 ,, 28.0 29.3 100.0 89.0 24 hr 20.7 19.5 95.1 78.1 Table XIV Effect of three derivatives on sedimentation rate of talc in isopropyl palmirate Settling volume (% of total) Settling time No derivative Acetulan Arnerchol L-101 Arnerlate P 10 min 97.6 98.8 98.8 98.4 20 ,, 96.9 97.6 97.6 97.6 30 ,, 95.1 97.6 97.6 97.6 40 ,, 95.1 96.6 96.6 96.6 60 ,, 92.7 95.1 95.1 94.6 90 ,, 89.9 92.7 92.7 92.2 120 ,, 85.4 89.9 90.2 87.3 24 hr 41.5 36.6 29.3 39.0 Table XV Effect of three derivatives on sedimentation rate of Oxy Red in isopropyl palmirate Settling volume (% of total) Settling time No derivative Acetulan Arnerchol L-101 Amerlate P 10 min 78.8 78.8 100.0 100.0 20 ,, 68.8 68.8 100.0 100.0 30 ,, 60.0 55.0 100.0 100.0 40 ,, 50.0 45.0 100.0 100.0 60 ,, 37.5 22.3 100.0 100.0 90 ,, 21.3 17.5 100.0 91.3 120 ,, 21.3 17.5 100.0 90.0 24 hr 15.0 15.0 12.5 41.3