Metamizole Sodium White Or Slightly Yellow Crystalline Powder - ZhongbeiNorthlandBioCh ( China ) - Offers to Sell and Export - Friday 30 September 2011 3:23 am - metamizole sodium white or slightly yellow crystalline powder cas no 5907 38 0 molecular formula c13h16n3nao4s molecular weight 333 34 apperance white or slightly yellow crystalline powder usage amp am...