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Appearance
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Clear colourless, odourless & tasteless liquid
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pH
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5.5 to 7.0
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Conductivity (at 25°C)
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NMT 5 µs/cm
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|
Acidity or alkalinity
|
On addition of methyl red solution the resulting solution should be not red. On addition of bromo thymol blue solution the resulting solution should be not blue.
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Ammonium
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NMT 0.00002%
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|
Calcium & magnesium
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A pure blue colored should be produced
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Heavy metal
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NMT 0.00001%
|
|
Chloride (Cl)
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NMT 0.00001%
|
|
Nitrate (NO3)
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NMT 0.00002%
|
|
Sulphate (SO4)
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NMT 0.001%
|
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Oxidisable substances
|
NMT 0.000002%
|
|
Residue on evaporation
|
NMT 0.001%
|