Sodium Sulphide
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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Dimethylamine |
Appearance: colorless transparent liquid.
Dimethylamine ≥ 99.8%;
Monomethylamine ≤ 0.10%;
Trimethylamine ≤ 0.05%;
Ammonia ≤ 0.03%;
Purposes: m... |
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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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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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Methylene Chloride |
Test items Index
Methylene Chloride % ≥99.95
Water % ≤0.01
Acid (HCl) % ≤0.0004
Chromaticity Hazen Unit（Pt-Co Color） ≤10
Residue a... |
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Dimethylamine |
Appearance: colorless transparent liquid.
Dimethylamine ≥ 99.8%;
Monomethylamine ≤ 0.10%;
Trimethylamine ≤ 0.05%;
Ammonia ≤ 0.03%;
Purposes: m... |
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