Potassium fertilizers
Potassium Carbonate 68% K₂O — Soluble Chloride-Free Potash
FOB Black Sea / MENA · CFR/CIF worldwide on request
Indicative price
USD 369–450 / MT
Indicative range — firm quote on request.
Key parameters
Quick contact
Full product details
Product overview
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 specification
| 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 |
Loading ports & logistics
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.
FOB loading at Black Sea chemical terminals (Novorossiysk, Taman) and MENA export hubs with covered bagging lines. Standard parcel sizes from 200 MT (coaster or flexitank lot) to 3,000 MT on handysize bulk carriers for dedicated holds.
CFR/CIF deliveries to South Asia (Mumbai, Chennai, Chittagong), East Africa (Mombasa, Dar es Salaam) and Mediterranean fertigation markets. Bagged cargo in 25 kg or 50 kg PP woven bags with PE liner suits ports without bulk discharge; palletised lots on 1,000–3,000 MT multipurpose vessels.
Typical lead time 12–25 days from contract to loading window, subject to bagging-line availability and moisture testing at dispatch.
Packaging & documentation
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
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 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