STAR CHEMISTRY

S.No   Parameters   Permissible limit   Maximum limit 1 Odor Agreeable Agreeable 2 Taste Agreeable Agreeable 3 pH 6.5-8.5 No relaxation 4 TDS(mg/l) 500 2000 5 Hardness (as CaCO 3 ) (mg/l) 200 600 6 Alkalinity (as CaCO 3 ) (mg/l) 200 600 7 Nitrate (mg/l) 45 No relaxation 8 Sulfate (mg/l) 200 400 9 Fluoride (mg/l) 1 1.5 10 Chloride (mg/l) 250 1000 11 Turbidity (NTU) 5 10 12 Arsenic (mg/l) 0.01 0.05

Bhopal disaster was occurred by one simple chemical reaction in methyl isocyanate storage tank . (note-MIC-METHYL ISOCYANATE)  MIC is used for the production of carbamate pesticides and also rubber and adhesives. MIC is a colorless liquid and pungent order .    it's boiling point is 38.3 degree Celsius (100.9 F) approximately our body higher temperature .  MIC is reacted with water ,this leads to formation of 1,3 dimethyl urea and carbon dioxide with evolution of heat .  this reaction is continued, this leads to increases the temperature of MIC stored tank . at that temperature all MIC was transforming  liquid to gas form . slowly MIC gas was evolved out through the smoke Aerial tower . because of high molecular weight of the MIC and high denser than the air ,it starts spread lower feet to ground . this two things only kills the lacks of people .1) is reaction with water 2.) is high molecular weight of gas.