Potassium fertilizers
Potassium Carbonate 68% K2O — Soluble Chloride-Free Potash
FOB Black Sea / MENA · CFR/CIF worldwide on request
Key parameters — Potassium Carbonate 68% K2O
Full specification — Potassium Carbonate 68% K2O
| Potassium (K2O) | 68% min |
| Purity (K2CO3) | 99% min |
| Chloride (Cl) | 0.05% max |
| Sulphate (SO4) | 0.05% max |
| Iron (Fe) | 0.001% max |
| Moisture | 0.5% max |
| Water insoluble | 0.1% max |
| Bulk density | 0.95–1.05 g/cm³ |
| Appearance | White granular or fine powder |
| HS code | 2836.40 |
Product overview — Potassium Carbonate 68% K2O
Potassium carbonate (K2CO3) is a white, highly soluble alkali salt that delivers 68% K2O with virtually no chloride — a combination sought by liquid fertilizer blenders, hydroponic growers and specialty crop programmes where salt accumulation from MOP would reduce yield or fruit quality. Unlike granular potash, K2CO3 dissolves rapidly in stock tanks and raises nutrient solution pH gently, improving micronutrient availability in acidic irrigation water.
Export buyers include compound liquid fertilizer plants in South and Southeast Asia, greenhouse complexes in the Mediterranean and Middle East, and industrial users blending potassium salts for glass and detergent feedstocks alongside agricultural grades. Production routes include reaction of potassium hydroxide with carbon dioxide and purification of natural potash-derived intermediates at integrated chemical complexes in the Black Sea and MENA regions.
At 99% minimum K2CO3 purity and 0.05% maximum chloride, the grade meets technical specifications for fertigation injection systems and chloride-sensitive perennial crops such as avocado, grape and citrus.
Full product details
Loading ports & logistics — Potassium Carbonate 68% K2O
Contract MOQ is 200 MT — fulfilled by 25 kg or 50 kg PE-lined bags on palletised coaster parcels or 1,000 kg FIBC big bags. Potassium carbonate is hygroscopic — moisture control during loading and ocean transit is essential to prevent caking and lump formation. Ship in sealed bags or moisture-barrier bulk holds with desiccant protection.
25 kg and 50 kg PP woven bags with PE liner suit container export from 200 MT (approximately 20–24 MT per 20-foot unit) to fertigation blenders and specialty crop programmes without bulk discharge berths. Bags are palletised, stretch-wrapped and desiccant-lined for humid discharge ports in South Asia and East Africa.
1,000 kg FIBC big bags move 200–1,000 MT on break-bulk coasters to greenhouse cooperatives and liquid-fertilizer plants with pneumatic bag dischargers. Moisture-barrier liners are mandatory — K2CO3 absorbs atmospheric humidity and cakes within hours of bag puncture.
Handysize bulk carriers handle annual framework contracts above 1,000 MT to dedicated chemical berths with covered silos. FOB loading at Black Sea and MENA bagging terminals; CFR and CIF quotes include vessel freight, marine insurance and discharge-port moisture-protection assessment. Typical lead time 12–25 days from contract execution to loading window.
Packaging & documentation — Potassium Carbonate 68% K2O
25 kg or 50 kg PP woven bags with inner PE liner, palletised and stretch-wrapped; 1,000 kg big bags for bulk-handling terminals; or direct bulk in sealed vessel holds with tarpaulin cover. Each lot ships with a mill certificate of analysis (COA), commercial invoice, packing list, bill of lading and certificate of origin. SDS per GHS included. Third-party inspection at loading (SGS, Bureau Veritas) available for LC-backed or first-time contracts.
FAQ — Potassium Carbonate 68% K2O
When should formulators choose potassium carbonate over potassium hydroxide?
K2CO3 delivers potassium with a milder alkalinity profile than KOH, making it safer to handle in blending plants and less aggressive toward tank linings. It suits liquid fertilizer recipes where a controlled pH rise is needed without the corrosivity of caustic potash.
How should potassium carbonate be stored to prevent caking in transit?
Ship in moisture-barrier bags or sealed bulk holds with desiccant liners. K2CO3 is hygroscopic — keep relative humidity below 65% during loading and discharge. Break up any surface crust before pneumatic transfer; do not mix with ammonium sources in the same hold.
Can potassium carbonate replace MOP in chloride-sensitive fertigation?
Yes. At 68% K2O with negligible chloride, K2CO3 serves greenhouse and orchard drip systems where KCl would accumulate salt stress. Cost per kg K2O is higher than MOP, so it fits high-value crops and precision fertigation rather than broad-acre broadcast.
Related products — Potassium Carbonate 68% K2O
- Potassium Nitrate — N + K soluble grade for greenhouse fruiting programmes
- Potassium Sulphate (SOP) — chloride-free granular potash with added sulphur
- Mono Potassium Phosphate (MKP) — zero-N P + K source for flowering-stage fertigation
