be classified a non regulated material sodium persulfate in non formulated form would be classified as an oxidizer that is as a regulated material according to these tests the data in table 4 shows that sodium persulfate formulated with either sodium carbonate or sodium sesquicarbonate is safer than sodium persulfate alone however this safety factor would be lost if the sodium persulfate separated from the mixture a study was conducted to evaluate the tendency of 75 sodium persulfate and 25 sesquicarbonate or 25 carbonate to segregate a segregation ladder having a 45 slope and 9 separate chambers was utilized a uniform mixture of 75 sodium persulfate and 25 of either carbonate or sesquicarbonate as indicated below was poured evenly down the segregation ladder each of the nine chambers was analyzed for persulfate the persulfate used in the study had a bulk density of 1 25 gram per cubic centimeter the sesquicarbonate used in the study had a bulk density of 45 pounds per cubic foot the carbonate used in the study had a bulk density of 48 pounds per cubic foot the test results are provided in table 5 table 5______________________________________segregation study results______________________________________sodium persulfate sodium carbonate formulation u2190 top bottom u2192 of segregation ladder of segregation ladderpercent sodium persulfatearea1area2 area3 area4 area5 area6 area7 area8 area976 2876 30 76 94 75 93 76 74 75 82 76 68 74 38 75 26sodium persulfate sodium sesquicarbonate formulation u2190 top bottom u2192 of segregation ladder of segregation ladderpercent sodium persulfatearea1area2 area3 area4 area5 area6 area7 area8 area977 9578 81 76 85 76 82 77 20 77 82 76 96 76 47 72 28______________________________________ table 5 above directly demonstrates the attainability of uniform mixtures of persulfate with carbonates and.