... or TT ITSUSES:ITIS WIDELYUTILIZEDIN LEMON ACID,POLLUTEDWATER TREATMENT,LEATHER,WASTE GAS TREATMENT,WATER PURIFIER,GOLDMINING,PAINTING,BLEACHINGAGENT,EPOXY PROPANE,PETRO-CHEMICALPRODUCTS.ETC ... :2ppm: As2O3: 3.7 ppm,HUMIDITY ; 0.36%PURPOSE: River water PH adjustment.