supply of ar grade chemicals & certified reference materials for drinking water quality testing laboratories of rural drinking water sanitation department shivamogga - ph buffer solution (10.0) 500 ml,nist traceable (as per iso,ph buffer solution (7.0) 500 ml,nist traceable (as per iso 17034),ph buffer solution (4.0) 500 ml,nist traceable,turbidity 100 ntu standard low range to high range 500 ml,colour standard solution (hazen 500) 1000ppm,potassium dichromate salt 80gm,sodium carbonate salt 50 g,sodium chloride salt 80 g,potassium chloride (conductivity solution) low range to high range,calcium carbonate salt smg,toluene smg,patton and reeder indicator,hexane smg,copper sulphate pentahydrate,conc. ammonium hydroxide,bromocresol green smg,ninty five percent ethanol