Jun 24, 2011   China sulphate feed additives prices remain stable   An eFeedLink Exclusive     Prices were stable to higher.   Transacted prices of sulphate feed additives in China Variety Price as of Jun 3 (RMB/tonne) Price as of Jun 20 (RMB/tonne) Price change (RMB/tonne) Cupric sulphate 15,400-15,700 15,400-15,700 0 ...