Sodium Carbonate
Indicator name Industrial-grade Food grade
Total alkali content（Na2CO3）% ≥ 99.2 99.2
Sodium chloride（NaCl）% ≤ 0.7 0.7
Iron（Fe）% ≤ 0.0035 0.004
Sulfate（SO4）% ≤ 0.03 0.001
Water insoluble matter% ≤ 0.03 0.000 2
Loss on ignition2） % ≤ 0.8 0.8
Packing density（g/ml） ≤ 0.9 0.03
Particle size, 180μm sieve residue% ≤ 70
Soda Ash Light (kg / bag) Heavy soda ash (kg / bag) Remarks
40 50 Composite plastic woven bags, flexible container bags packing
750 1000
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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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DL-Methionine |
Project Name Quality indicators
Superior grade First grade
Shape White or light gray powder
DL-Methionine% ≥ 99 98.5
Loss on drying% &le... |
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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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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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Anhydrous Sodium Sulfite |
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 (N... |
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