important material of inorganic chemical industry, used in TV tube, decarbonization, welding rod, drug, oxydol, film, enamel, printing, dyeing and potash glass.
Standard: GB/T1587-2000
Index name／Standard／Grade
Ⅰ
Ⅱ
Top-grade
First grade
Qualified product
Color TV grade
Potassium carbonate(K2CO3)% ≥
99.00
98.50
96.00
99.00
Chloride(as KCL)%≤
0.01
0.10
0.20
0.03
Sulfur compound（as K2SO4)%≤
0.01
0.10
0.15
0.04
Fe %≤
0.001
0.003
0.010
0.001
Water insoluble matter %≤
0.02
0.05
0.10
0.04
Loss on ignition %≤
0.60
1.00
1.00
0.80
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