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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Hydrochloric acid | Item Index Total acidity（HCI） ≥ 31.0 Iron（Fe） ≤ 0.002 Residue on ignition ％ ≤ 0.05 Free chlorine（CI）％ ≤ 0.004 Arsenic(As)％ ≤ 0.... |
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Dimethylamine | Appearance: colorless transparent liquid. Dimethylamine ≥ 99.8%; Monomethylamine ≤ 0.10%; Trimethylamine ≤ 0.05%; Ammonia ≤ 0.03%; |
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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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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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Sodium Carbonate | Indicator name Industrial-grade Food grade Total alkali content（Na2CO3）% ≥ 99.2 99.2 Sodium chloride（NaCl）% ≤ 0.7 0.7 Iron（Fe）% ≤ 0.003... |
