Sulphuric acid
Item Index
Concentrated sulfuric acid Fuming sulfuric acid
Sulphuric acid(H2SO4)% ≥ 92.5or98.0 -
Free sulfur trioxide(SO4)% ≥ - 20.0or25.0
Ash % ≤ 0.02 0.02
Iron(Fe)% ≤ 0.005 0.005
Arsenic(As)% ≤ 0.0001 0.0001
Mercury(Hg)% ≤ 0.001 -
Lead(pa)% ≤ 0.005 0.005
Transparency ≤ 80 -
Transparency mL ≤ 2 -
Packing: 850 liters, 1000 liters plastic bucket.
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Polyether polyol |
Model Hydroxyl value Water content Acid value pH value Potassium Chromaticity Viscosity Degree of unsaturation
mgKOH/g % mgKOH/g mg/Kg APHA mPa.s/... |
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Thiourea |
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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Dimethylamine |
Appearance: colorless transparent liquid.
Dimethylamine ≥ 99.8%;
Monomethylamine ≤ 0.10%;
Trimethylamine ≤ 0.05%;
Ammonia ≤ 0.03%;
Purposes: m... |
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Potassium dichromate |
Item Index
Potassium dichromate (K2Cr2o7) % ≥ 99.7
Chlorides (Cl)% ≤ 0.05
Insoluble ≤ 0.02
Sulfates ( SO4-2) % ≤ 0.02
Na+ % ≤ 0... |
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Resin-specific adsorption of gold |
Indicator Parameter
Functional group -N+(CH3) 2H2O
Appearance Milky white opaque sphere
Finished form CLˉ
Moisture content % 45-55
Weight... |
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