At the National Commodity and Derivatives Exchange (NCDEX), the May contract slipped by Rs 18, or 1.28%, to Rs 1,388.50 per quintal in 1,090 lots.
Increased selling at existing higher levels in tandem with weak spot market sentiments affected the trade.
Higher supply and reduced offtake in physical markets mainly put weight on future prices.
Besides, weak demand from beer and cattle-feed making industries too put pressure on the futures pries.