Marketmen said, besides offloading of positions at prevailing levels by participants, a subdued trend at the spot markets due to slackness in demand amid pick-up in supplies from growing belts also weighed on guar gum prices in futures trading.
Besides, a considerable fall in export demand too put pressure on prices, they added.
At the National Commodity and Derivatives Exchange, guar gum for delivery in July slumped by Rs 241, or 2.77 per cent, to Rs 8,450 per quintal, in an open interest stood at 115 lots.