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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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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Сульфат натрия безводный |
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 (... |
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Соляная кислота |
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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Смола-специфической адсорбции золота |
Indicator Parameter
Functional group -N+(CH3) 2H2O
Appearance Milky white opaque sphere
Finished form CLˉ
Moisture content % 45-55
Weigh... |
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Триоксид мышьяка |
Main content Other impurities
Arsenic trioxide Iron Lead Chlorine Chromium Cadmium Water
As2O3 Fe Pb Cl Cr Cd H2O
≥ ≤ ≤ ≤ ≤ &l... |
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