SILICA 3 REAGENT USED FOR WATER ANALYSIS. COMPOSITION:SODIUM SULFITE CAS 7757-83-7. The specific analytical test to be performed is the measurement of silica content in a water sample. This is achieved through using Silicomolybdate method or Heterpoly Blue method chemistry, both are supplied through the Colorimettic method test. The results are expressed in ppm mg/L SiO2 and can either be displayed visually colour cubes/disks etc or by using a photometer

CLASSIFICATION IS DETERMINED ACCORDING TO GIRS 1 AND 6 OF THE COMBINED NOMENCLATURE. CN 28321000 FOR Sodium sulphites. .NOTE 1 TO CHAPTER 29 APPLIES