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(1) Glass industry: The production of optical glass can improve glass transparency, strength and refractive index.
(2) Reagent industry: high-purity analysis, emission spectrum analysis, etc. It can also be used as a fluxing agent for silicate and insoluble sulfate, a water-absorbing agent for organic liquids, electroplating, fertilizer, and photographic industries.
(3) Food industry: Alkaline agent and dough improver, and can inhibit the sourness of noodles. It can be used as a leavening agent in food and can be used for noodles.
(4) Light industry: printing and dyeing, soap, enamel, preparation of potassium salt, synthetic ammonia decarbonylation, also used in color TV industry, as gas adsorbent, dry powder fire extinguishing agent, rubber anti-aging agent, etc.; used for washing of exposed photosensitive materials Processing.
(5) Pharmaceutical industry: synthetic ammonia decarbonylation, additives, pharmaceutical intermediates.

Index

①Indices of industrial grade potassium carbonate:

Item	Premium	First grade
Total alkalinity as K₂CO₃(%)	Min 99	Min 98.5
Fe(ppm)	Max 10	Max 30
Kcl(%)	Max 0.01	Max 0.1
K₂SO₄(%)	Max 0.01	Max 0.1
Ig-Loss(%)	Max 0.6	Max 1
Warter Insoluble(%)	Max 0.02	Max 0.05

②Indices of food additive potassium carbonate:

Item	Standard value
Content，≥%	99
Fe，≤ppm	10
arsenic，≤ppm	2
Potassium Chloride，≤%	0.01
Potassium Sulfate，≤%	0.01
Lg-loss,≤%	0.6
Moisture，≤%	0.02
Heavy metal，≤ppm	10
Exterior	White, powder or granular

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