COA OF ASH SODA B TYPE Mass fraction of sodium carbonate ( Na2CO3) 98% Mass fraction of sodium carbonate ( Na2CO3) in terms of uncalculated product % not less 98.2 Mass fraction of loss on ignition ( at 270 -300�°C) % not more 0,8 Mass fraction of Chlorides in terms of NaCl, no more 0,5 Mass fraction of iron in terms of Fe2O3, not more than % 0.003 The rest of substances insoluble in water, not more than % 0,04 Mass fraction of sulfates in terms of Na2SO4, no more % 0,05