Potassium Carbonate Powder (K2CO3, CAS 584-08-7) is a water-soluble inorganic potassium salt widely used in glass manufacturing, ceramics, chemical synthesis, detergents, and food applications.
Product Identification
|
Parameter |
Specification |
|
Chemical Name |
Potassium Carbonate |
|
Formula |
K2CO3 |
|
CAS No. |
584-08-7 |
|
EINECS |
209-529-3 |
|
Molecular Weight |
138.21 g/mol |
|
Appearance |
White powder or crystalline material |
|
Water Solubility |
Highly soluble in water (forms alkaline aqueous solution) |
|
Physical Property |
Strongly hygroscopic (moisture-sensitive) |
Grade Selection and Specifications
|
Parameter |
Superior Grade |
TV Glass Grade |
First Grade |
Qualified Grade |
|
K2CO3 Assay |
>= 99.0% |
>= 99.0% |
>= 98.5% |
>= 96.0% |
|
Chloride (as KCl) |
<= 0.01% |
<= 0.03% |
<= 0.10% |
<= 0.20% |
|
Sulfur Compound (as K2SO4) |
<= 0.01% |
<= 0.04% |
<= 0.10% |
<= 0.15% |
|
Iron (as Fe) |
<= 0.001% |
<= 0.001% |
<= 0.003% |
<= 0.010% |
|
Water-Insoluble Matter |
<= 0.02% |
<= 0.04% |
<= 0.05% |
<= 0.10% |
|
Loss on Ignition |
<= 0.60% |
<= 0.80% |
<= 1.00% |
<= 1.00% |
Key Specification Parameters Explained
K2CO3 Assay: Represents the primary active content; forms the baseline for grade selection.
Chloride & Sulfate: Inorganic impurities that must be strictly capped for chloride- and sulfur-sensitive synthesis and formulations.
Iron (Fe): Directly impacts optical clarity and color purity in glass and ceramic production.
Water-Insoluble Matter: Measures solid residues after dissolution; critical for processes requiring clear aqueous solutions or fine filtration.
Loss on Ignition: Evaluates moisture retention and volatile loss under standardized quality control methods.
Application Guide
|
Application |
Key Parameters Focus |
Buyer Consideration |
|
Glass Manufacturing |
Low Fe, Low Chloride, Low Sulfate |
Optical clarity and batch consistency |
|
Ceramics |
Low Fe, Low Insolubles |
Firing stability and color control |
|
Chemical Synthesis |
High Assay, Low Moisture, Specific Impurities |
Reaction stoichiometry and stoichiometric purity |
|
Detergents & Cleaning |
High Assay, Alkalinity, Dissolution Rate |
Rapid solubility and powder handling |
|
Food Applications |
E501(i) Compliance, Heavy Metals (As, Pb, Hg) |
Food-grade certification (Industrial grade cannot be substituted) |
Packaging and Logistics Specifications
|
Packaging Type |
Standard Specification |
Container Loading Capacity (20ft FCL) |
|
25 kg Bags |
PP woven bag with PE inner moisture-proof liner |
~20 MT (Palletized) / ~22-24 MT (Unpalletized) |
|
Jumbo Bags (500 kg / 1,000 kg) |
Heavy-duty bulk bags with UV protection and PE liner |
~20 MT (Palletized) |
|
Customized Packaging |
Private labeling, custom bag weights, shrink-wrapping |
Available upon commercial agreement |
Quality Control and Procurement Workflow
Specification Confirmation: Review raw material requirements against target process limits.
COA and Sample Testing: Verify batch Certificate of Analysis (COA) and perform laboratory evaluation.
Plant Trial: Validate physical and chemical performance under actual operational conditions.
Commercial Terms: Confirm grade, volume (MOQ: 20 MT), packaging, shipping terms (FOB/CIF), and pricing.
Order Release: Secure technical specifications, Safety Data Sheet (SDS), and batch requirements.
Pre-Shipment Verification: Provide batch COA, packaging photos, and shipping documentation prior to dispatch.
FAQ
Q: What is the Minimum Order Quantity (MOQ) for bulk purchases?
A: The standard Minimum Order Quantity is 20 Metric Tons (one 20ft Full Container Load). Trial order quantities can be evaluated based on specific customer requirements.
Q: Can industrial-grade potassium carbonate be used for food applications?
A: No. Food applications require food-additive grade material compliant with EU E501(i) or local regulatory standards, along with strict heavy metal limits (Arsenic, Lead, Mercury) and food safety documentation. Industrial-grade material should not be substituted for food production.
Q: Why is batch COA verification important prior to shipment?
A: K2CO3 assay alone does not guarantee performance. Verifying batch-specific COAs ensures that key impurities (iron, chloride, sulfate, and insolubles) fall within your acceptable process limits, ensuring production consistency.
Q: How is potassium carbonate protected against caking during ocean transit?
A: Because potassium carbonate is strongly hygroscopic, all export packaging utilizes double-layer protection (PP woven outer bags with heavy-duty PE inner liners).
Q: Are Potassium Carbonate (K2CO3) and Potassium Bicarbonate (KHCO3) interchangeable?
A: No. They are distinct chemical compounds with different chemical properties, pH levels, and reaction behaviors. Always confirm the required chemical name and CAS number (584-08-7 for K2CO3) before placing an order.
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