Сульфид натрия
Class 1 Class 2 Class 3
Test items Superior grade A first-rate product Acceptable product A first-rate product Acceptable product
Sodium Sulphide （Na2S） % ≥ 60 60 60 60 60 65
Sodium sulfite （Na2SO3） % ≤ 2 － － － － －
Thiosulfuric acid （Na2S2O3）% ≤ 2 － － － － －
Iron (Fe) % ≤ 0.03 0.12 0.2 0.003 0.005 0.08
Sodium carbonate （Na2CO3） % ≤ 3.5 5 － 2 3 4
Water insoluble matter % ≤ 0.2 0.4 0.8 0.05 0.1 0.3
Industrial sodium sulfide into three categories: one for ordinary sodium sulfide (commonly known as red alkali); Class 2 low iron sodium sulfide (commonly known as the yellow base); three types of high levels of sodium sulfide.
Packaging: 25kg、40kg、1000kg weaving.
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Калиябих ромат | Item Index Potassium dichromate （K2Cr2o7） % ≥ 99.7 Chlorides (Cl)% ≤ 0.05 Insoluble ≤ 0.02 Sulfates ( SO4-2) % ≤ 0.02 Na+ % ≤ ... |
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Сульфат аммония | Test items Index Exterior White crystalline Nitrogen ％ ≥ 21 Water (Ｈ2Ｏ) ％ ≤ 0.2 free carbonic acid (H2SO4)％ ≤ 0.03 Iron (Fe) ％ ≤ 0... |
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Цианид натрия Китай | 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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Тиомочевины | Test items Index Thiourea % ≥ 99 Heating Loss % ≤ 0.4 Ash % ≤ 0.1 Water insoluble matter % ≤ 0.02 Thiocyanate % ≤ 0.02 Melting... |
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оксид цинка | Test items Indirect method Direct method Zinc oxide(counted by dried substances )% ≥ 99.7 99.5 Metal ( Zn ) % ≤ None None Lead oxide( Pb ... |
