Purity     ≥99.0%<\/p>

PH（50g\/L,25℃）    6.0～7.5<\/p>

Clarity test     ≤3<\/p>

Water insoluble matter     ≤0.005%<\/p>

Chloride     ≤0.02%<\/p>

Sulfate and sulfite (as SO4)     ≤0.05%<\/p>

Sulfide      ≤0.00025%<\/p>

Total nitrogen     ≤0.005%<\/p>

Mg    ≤0.001%<\/p>

Ca     ≤0.003%<\/p>

Fe     ≤0.0005%<\/p>

Heavy metals (as Pb)     ≤0.0005%<\/p>