July 28, 2008 China niacinamide prices down on weaker demand   An eFeedLink Exclusive Prices were slightly lower in most regions. Prices of niacinamide in China Region Imported products Transacted price Transacted price Price change as of Jul 15 (RMB/kg) as of Jul 28 (RMB/kg) (RMB/kg) Beijing 138-144 135-140 -4 to -3 S ...