July 8, 2008 China's sulphate feed additive prices stable to lower on lacklustre demand An eFeedLink Exclusive Prices were unchanged or lower. Transacted prices of sulphate feed additives in China Variety Price as of Jun 20  (RMB/tonne) Price as of Jul 7 (RMB/tonne) Price Change (RMB/tonne)   Cupric sulphate 16,000-16, ...