The most dominant signs of acute toxicity effects were: laboured breathing, irritation, hind limb paralysis, convulsions and ataxia. The severity of the signs of toxicity increased with increase in the dose. There was no observed sign of toxicity in the group of mice that received normal saline. The lowest observed effect level (LOEL) recorded was at a dose rate of 5000mg/Kg .The number of death reported at LOEL was one mice out of six (16.7%) and the corresponding toxic effects included hypoactivity and laboured breathing. At the highest dose level, all mice in the group (100%) died within 3 hours post-administration and signs of toxicity included ataxia, convulsion, laboured breathing and paralysis of the hind limb. The corresponding mortality probit for determination of LD50 were calculated as recommended by Miller and Tainter[10], Ghosh[11] and Al-Ali et al.[12], and are shown in Table 2.