This indicates that at these doses, this additive may be toxic especially when administered on long term
basis. Acute toxicity studies (Table 3) revealed no mortality and no visible sign of toxicity. Acute toxicity is toxicity elicited as a result of short term exposure to a toxicant. The LD50 was not calculated because therewas no mortality at 5000 mg/kg dose level indicating that it is relatively safe under short term exposure. However, acute toxicity data are of limited clinical application since cumulative toxic effects do occur even at low doses. Sub-acute and chronic toxicity are useful in evaluating the safety profile of additives. The enzymatic activity of ALT, AST and ALP were studied to evaluate liver malfunctions (Table 4). Significant increases in ALT, AST and ALP activities were observed in the test rats at all dose levels, except at the 10 mg/kg dose level compared with control. This indicates that at these dose levels, there is a possibility of liver damage on long term exposure. Increases in ALP activities have been reported on administration of trona (Ajiboye et al., 2013) [16]. Ajiboye et al. (2015) [16] also reported a dose dependent reduction in the activities of SOD and Catalase in the liver of male wistar rats. This is consistent with the report of this study. The effect of trona on the kidney is not so pronounced; as most markers of renal function were not significantly affected.