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pH
5.5 to 8
Conductivity
<30
μ
s.cm-1
TDS
<40 mg/l
Maximum hardness
<50 mg/l
Chlorine
<10 mg/l
Heavy metals
<10 mg/l
Phosphates
<0.2 mg/l as P2O5
Silicates
<0.2 mg/l as SiO2
Endotoxins
<0.25 EU/ml
Total number of
micro-organisms
<100 per 100 ml
