Table 1.

Effect of four sodium benzoate concentrations at 24 and 48 hrs on micronucleus formation in lymphocytes.

Treated substance	Treatment		MN ± SE (%)
	Period (hrs)	Conc. (mg/mL)
Control	24	0	42.88 ± 2.88
SB	24	0.5	51.52 ± 1.62
	24	1.0	66.67 ± 2.10*
	24	1.5	69.23 ± 1.36*
	24	2.0	86.67 ± 1.77*
Control	48	0	50.00 ± 2.88
SB	48	0.5	63.64 ± 1.01*
	48	1.0	69.23 ± 1.05*
	48	1.5	78.57 ± 1.17*
	48	2.0	93.64 ± 1.42*

^*Significantly different from the control (P < 0.05).

SB: sodium benzoate.

MN: micronucleated cell.