At the Multi Commodity Exchange, mentha oil for delivery in far-month August fell by Rs 1.20, or 0.14 per cent to Rs 843 per kg in business turnover of 16 lots.
Similarly, the oil for delivery in July contracts traded lower by Re 1, or 0.12 per cent to Rs 832.20 per kg in 169 lots.
The slide in mentha oil prices at futures trade was mostly attributed to profit-booking by participants at existing levels amid fall in demand from consuming industries against adequate stocks position, analysts said.