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molecular formula: nah2po4·2h2o
molecular weight: 156.01
cas no: 13472-35-0
properties: colorless rhombic crystal. relative density is 2.040 and melting point is 60℃. soluble in water and insoluble in alcohol.
uses: as analytical reagent and buffer agent. it can be used in preparing bacteria culture medium, in food, fermentation, leather, boiler water, and other industries.
standard: the maximum content of impurities is in percentage content
| specifications/item |
analytically pure-ar
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chemically pure-cp
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high purity
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assay(nah2po4·2h2o)/%
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≥99.0
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≥98.0
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≥98.0
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ph value (50g/l,25℃)
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4.2~4.6
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4.2~4.6
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4.2~4.6
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clarity test
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qualified
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qualified
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－
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water insoluble matter
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≤0.01
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≤0.02
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≤0.05
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chloride(cl)
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≤0.005
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≤0.01
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≤0.014
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sulfate(so4)
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≤0.005
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≤0.01
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≤0.25
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nitrate(no3)
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≤0.001
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≤0.002
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－
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ammonium (nh4)
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≤0.002
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－
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－
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potassium (k)
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≤0.02
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≤0.1
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－
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iron (fe)
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≤0.001
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≤0.005
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－
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arsenic (as)
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≤0.0002
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≤0.0005
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≤0.005
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heavy metal (pb)
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≤0.001
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≤0.005
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≤0.002
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ammonia precipitate/%
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≤0.01
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≤0.02
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－
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fluoride(f) /%
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－
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－
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≤0.005
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packing: woven bag lined with plastic bag, kraft bag, or fiber drum, net weight is 25kg.
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