Thiourea
Test items Index
Thiourea % ≥ 99
Heating Loss % ≤ 0.4
Ash % ≤ 0.1
Water insoluble matter % ≤ 0.02
Thiocyanate % ≤ 0.02
Melting point ℃ 171
Packaging: 25kg、1000kg weaving.
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Cupric sulfate |
Test items Superior grade Feed-grade
Cupric sulfate(CuSO4.5H2O) % ≥ 98 98.5
Acidity (H2SO4) % ≤ 0.2 0.2
Water insoluble matter % ≤ 0.2 ... |
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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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Wearable steel ball |
Forged grinding steel balls
Size Surface Core
DIA 40-60 mm HRC60-64 HRC59-63
DIA 70-80 mm HRC60-64 HRC58-62
DIA 90-100 mm HRC60-64 HRC57-6... |
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Toluene-2,4-diisocyanate |
Test items Index
Isocyanate % ≥99.0
Saponifiable chlorine % ≤0.01
Chlorine % ≤0.04
Crystallizing point℃ % 5.0-6.5
Chromaticity (Hazen... |
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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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