Potash fertilizers
SOP — Potassium Sulphate
K₂SO₄ — 50% K₂O, 18% S
Chloride-free potassium, with a sulphur contribution alongside it. It exists because a substantial group of crops — potatoes, tobacco, most fruit, vines and many vegetables — suffer quality loss when chloride accumulates in the root zone.
It costs materially more than MOP per unit of potassium. That premium is only worth paying where chloride sensitivity or a low salt index actually matters; on cereals it usually does not.
Specification
Technical data
- Appearance
- White to off-white powder or granules
- Potassium
- 50% min K₂O (≈41.5% K)
- Sulphur
- 17–18% S, as sulphate
- Chloride
- 1.5% max — the reason for the product
- Moisture
- 0.5% max
- Granulometry
- Powder <0.15 mm, or granular 2–4 mm
- Bulk density
- 1.20–1.30 t/m³ (granular)
- CAS number
- 7778-80-5
- HS code
- 3104 30
- Transport status
- Not classified as a dangerous good
Classification, HS code and transport regime are confirmed per grade and per route at the offer stage. Figures below are indicative of the standard specification.
Packaging
- Bulk, in covered equipment
- Big bag 500 / 1000 / 1250 kg
- PP bags 25 and 50 kg, palletised and hooded
Storage and handling
- Dry, covered storage; less hygroscopic than MOP but still cakes when wet
- Powder grade for dissolving and fertigation; granular grade for field application
- Low salt index — suitable for placement close to seed where MOP would not be
Transport
- Unregulated for transport by road, rail and sea
- Covered equipment; clean holds with previous cargo history checked
Documents
- Technical data sheet (TDS) — issued with the offer
- Safety data sheet (SDS) in the languages of transit and destination
- Certificate of analysis, lot-specific, drawn at loading
- Certificate of origin and EUR.1 where the destination allows preference
Documents are issued against a confirmed enquiry rather than published for download — an SDS is only meaningful for the grade and revision actually shipped.
Commercial terms
How it is quoted
- Incoterms
- FCA, FOB, CIF, DAP, CPT
- Typical lot size
- From 100 t bagged; 1,000–20,000 t in bulk
- Lead time
- 4–8 weeks from contract
Request a quote
SOP — Potassium Sulphate
Send quantity, delivery terms and destination and a trader will come back with a firm offer within 24 hours on working days. No price is published — every quote is prepared per shipment.