December 7, 2011   Sulphate additives demand in China remains slow An eFeedLink Exclusive     Prices moved within a narrow range.   Transacted prices of sulphate feed additives in China Variety Price as of Nov 20 (RMB/tonne) Price as of Dec 6 (RMB/tonne) Price change (RMB/tonne) Cupric sulphate 15,950-16,400 16,100-16, ...