November 25, 2008 Slack demand drags down sulphate feed additive prices   An eFeedLink Exclusive Prices were substantially lower. Transacted prices of sulphate feed additives in China Variety Price as of Nov 7 Price as of Nov 21 Price Change (RMB/tonne) (RMB/tonne) (RMB/tonne) Cupric sulphate 10,500-12,500 9,500-10,500 ...