Sodium Sulfite is a chemical compound that you can find in two different states, as an anhydrous chemical or as a heptahydrate. The chemical is prepared industrially through the reaction of sodium hydroxide with sulfur dioxide. 

Magnesium Sulfate is a chemical compound, a salt. It is a very useful chemical compound which is made by reacting magnesite or magnesia with sulfuric acid. Its chemical formula is MgSO4. 

Copper sulfate pentahydrate is a blue crystalline solid. It is not combustible and has a strong, nauseating metallic taste. However, it is odorless. When dehydrated, it turns white. 

Calcium Carbonate 99% is a chemical compound having the formula CaCO3. It is commonly found in rocks as the minerals calcite and aragonite. It is a very popular mineral in the earth. 

Lovibond DPD Rapid Water Testing Tablet, Chlorinated water is safe to drink, the water testing tablet is mainly used to test the pH of water, The residual chlorine range of the DPD method is typically 0.01-5.00 mg/L. In addition.