Cat No.: 300069 Grade: AR MF: C6H7NO3S CAS: 121-57-3 Appearance: white crystalline powder Specification:assay >=99.8%clarity of solution: passes testinsoluble in 5% Na2CO3 solution <=0.01%loss on drying <=0.1%ignition residue <=0.02%chloride(Cl) <=0.001%nitrite(CO2) <=0.00002%sulfate(SO4) <=0.005%usage: testing Al, Mg, K, Na, Iodine, iodides, nitrites ( function(){ var aBigImageSrc = [ 'http:// ...