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Molecular formula: Na2SO4
Molecular weight: 142.04
CAS NO:15124-09-1
Properties: white crystalline powder. Relative density is 2.68 and melting point is 884℃. Soluble in water and glycerin, insoluble in ethyl alcohol.
Uses: as analytical reagent, dehydrant, interfere inhibitor in atomic absorption spectrum analysis, accessory for drugs and foods.
Standard: maximum assay of impurities is in %
| Specification/item |
Analytically pure-AR
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Chemically pure-CP
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High pure
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Assay(Na2SO4) /%
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≥99.0
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≥98.0
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≥99.0
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PH value(50g/L solution, 25℃)
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5.0~8.0
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5.0~8.0
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5.0~8.0
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Clarity test
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Qualified
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Qualified
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Qualified
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Water insoluble matter
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≤0.005
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≤0.02
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≤0.02
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Loss on ignition
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≤0.2
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≤0.5
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≤0.5
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Chloride (Cl)
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≤0.001
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≤0.005
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≤0.005
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Phosphate (PO4)
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≤0.001
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≤0.002
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—
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Total nitrogen (N)
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≤0.0005
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≤0.001
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≤0.002
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Potassium (K)
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≤0.01
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－
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—
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Calcium (Ca)
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≤0.002
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≤0.005
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—
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Iron (Fe)
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≤0.0005
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≤0.001
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≤0.001
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Heavy metal (Pb)
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≤0.0005
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≤0.002
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≤0.001
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Packing: woven bag lined with plastic bag, kraft paper bag, or fiber drum, net weight is 25kg.
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