Sodium Sulfate Anhydrous | High pure | A.R. | C.P. | Glucosamine grade | Special grade |
Assay(Na2SO4)% | ≥99.5 | ≥99.0 | ≥99.0 | ≥99.0 | ≥99.6 |
Water insoluble% | ≤0.01 | ≤0.005 | ≤0.02 | ≤0.02 | ≤0.02 |
Arsenic As% | ≤0.0001 | ≤0.0001 | ≤0.0002 | ≤0.0005 | ≤0.0005 |
Heavy metal(as Pb) % | ≤0.0002 | ≤0.0005 | ≤0.002 | ≤0.002 | ≤0.002 |
Iron (Fe)% | ≤0.0002 | ≤0.0005 | ≤0.0015 | ≤0.001 | ≤0.001 |
Chlorides(Cl) % | ≤0.001 | ≤0.001 | ≤0.005 | ≤0.05 | ≤0.05 |
Calcium and Magnesium(Mg)% | —— | —— | —— | ≤0.06 | ≤0.06 |
Water% | —— | —— | —— | ≤0.15 | ≤0.15 |
Fineness(30-mesh sieve residue) % | —— | —— | —— | ≤5 | —— |
PH | 5.0-8.0 | 5.0-8.0 | 5.0-8.0 | 5.0-9.0 | 5.0-9.0 |
Clarity test% | Pass | Pass | Pass | —— | —— |
Residue on Ignition% | ≤0.5 | ≤0.2 | ≤0.5 | —— | —— |
Nitrates(NO3)% | ≤0.001 | —— |
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