Ammonium sulfate
Test items Index
Exterior White crystalline
Nitrogen % ≥ 21
Water (H2O) % ≤ 0.2
free carbonic acid (H2SO4)% ≤ 0.03
Iron (Fe) % ≤ 0.007
Arsenic(As) % ≤ 0.00005
Heavy metal (pb) % ≤ 0.005
Water insoluble matter % ≤ 0.01
Packaging: 25kg、50kg、1000kg Weaving.
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Sodium cyanide |
Test items Index
Shape Lump
Sodium cyanide (NaCN) % ≥98.0
Sodiun hydroxide (NaOH) % ≤0.5
Sodium carbonate (Na2CO3) % ≤0.5
Water (H2O... |
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Zinc oxide |
Test items Indirect method Direct method
Zinc oxide(counted by dried substances )% ≥ 99.7 99.5
Metal ( Zn ) % ≤ None None
Lead oxide( Pb ... |
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Potassium cyanide |
Test items Index
Shape Lump
Potassium cyanide (KCN) % ≥99.0
Potassium hydroxide(KOH) % ≤0.3
Potassium carbonate(K2CO3)% ≤0.4
Potassi... |
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Sulphuric acid |
Item Index
Concentrated sulfuric acid Fuming sulfuric acid
Sulphuric acid(H2SO4)% ≥ 92.5or98.0 -
Free sulfur trioxide(SO4)% ≥ - 20.0or25.... |
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Anhydrous Sodium Sulfite |
Test items Food-grade High-purity grade Industrial-grade
Sodium sulfite (Na2SO3) % ≥ 97 98 97
Iron Fe % ≤ 0.001 0.001 0.003
Free Alkali (N... |
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