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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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 Sulphi... |
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Пиросернистокислый натрий |
Test items Refined High-purity grade Food-grade Industrial-grade
Sodium metabisulfite % ≥ 98.5 98 97.5 97.0
Iron Fe % ≤ 0.0005 0.001 0.0015... |
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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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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 ... |
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2,4-Толуилендиизоцианат |
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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