October 24, 2011   Sulphate additives prices stable in China despite soft demand   An eFeedLink Exclusive     Prices were mostly stable.   Transacted prices of sulphate feed additives in China Variety Price as of Sep 30 (RMB/tonne) Price as of Oct  20 (RMB/tonne) Price change (RMB/tonne) Cupric sulphate 15,800-16,300 1 ...