Liquid Fertilizer

Potassium Phosphite Supplier

Wholesale supply of Potassium Phosphite Solution for importers, distributors, cooperatives and institutional buyers. Trusted sourcing, global delivery and complete export documentation.

30% P₂O₅(Phosphate)
20% K₂O(Potash)
Liquid solutionAppearance

Request Current Offer

Wholesale & institutional orders only — no retail sales

Wholesale SupplyB2B only
Multiple OriginsEurope, China
LCL & FCLShipments
SGS / IntertekInspection on request

Approved ProducerNetwork
CompetitiveWholesale pricing
Quality AssuranceSGS / Intertek
Export DocumentationFull document set
Global Shipping& delivery support

Reliable Global Supply of Potassium Phosphite Solution

We supply Potassium Phosphite solution to importers, distributors, agrochemical companies, and specialty crop operators seeking a concentrated liquid source of phosphonate and potassium for foliar and fertigation programs. Potassium phosphite is valued for its dual role in delivering phosphorus (as phosphonate) and potassium while supporting systemic plant health through phosphonate's activity against Phytophthora and other oomycete pathogens. Supply is subject to grade and origin confirmation.

Wholesale supply only

We supply business buyers only — no retail sales. Orders ship as LCL or FCL.

Read the full Potassium Phosphite Solution product overview

Potassium phosphite (K-phosphite) is a liquid fertilizer produced from the neutralisation of phosphorous acid (H₃PO₃) with potassium hydroxide. It is distinct from conventional phosphate fertilizers: the phosphorus is in the phosphonate (P³⁺) form rather than phosphate (P⁵⁺), which gives it systemic mobility within the plant and a recognised role in eliciting plant defence responses against downy mildew, Phytophthora root rot, and related oomycete diseases. In many markets potassium phosphite is registered as both a fertilizer and a biostimulant.

A typical commercial potassium phosphite solution contains approximately 30% P₂O₅ (as phosphonate) and 20% K₂O, with a density of approximately 1.35–1.45 kg/L. It is fully water-soluble, has a neutral to slightly alkaline pH, and is compatible with most soluble fertilizers and many crop protection products, though compatibility should always be confirmed for each tank-mix program. Application rates are typically 1–3 L/ha in foliar programs or proportionally lower in fertigation.

We source potassium phosphite from specialty chemical and fertilizer producers in Europe, China, and other approved origins. Full Safety Data Sheet, COA, and Technical Data Sheet are provided with every shipment. Buyers should confirm the regulatory classification (fertilizer vs. plant protection product) of potassium phosphite in their destination market, as regulatory status varies by country.

Current Supply Overview

Origin	Packaging	Shipment Options	Availability
Europe	Drums / IBC	LCL / FCL	Subject to current supply
China	Drums / IBC	LCL / FCL	Subject to current supply
Other approved origins, depending on product and compliance			On request

Europe
Packaging
Drums / IBC
Shipment
LCL / FCL
Availability
Subject to current supply
China
Packaging
Drums / IBC
Shipment
LCL / FCL
Availability
Subject to current supply
Other approved origins, depending on product and compliance — on request.

Origin, availability and shipment window are confirmed in each commercial offer.

Typical Specifications

Request Full Technical Sheet

Typical specifications of Potassium Phosphite Solution
P₂O₅ (as phosphonate/phosphite) min.	30.0%
K₂O min.	20.0%
Specific gravity at 20°C	~1.35–1.45 kg/L
pH (neat)	6.0–8.0 (typical)
Phosphate (P⁵⁺) content	< 5% of total P (phosphonate grade)
Chloride (Cl)	< 0.1% (typical)
Water-insoluble matter max.	0.05%
Appearance	Clear to pale-yellow aqueous solution
Packaging	IBC totes 1,000 L, drums 200 L
HS Code	3105.90

Specifications shown are typical and may vary by origin. Final specifications are confirmed against the producer's Certificate of Analysis (COA).

Packaging Options

IBC totes 1,000 L
Drums 200 L
ISO tank containers (bulk liquid, subject to volume)
Containerised shipment (20ft / 40ft)

Shipping & Logistics

Part-container loads (LCL) for smaller orders
Full 20ft & 40ft container loads (FCL)
FOB, CFR and CIF terms
Competitive freight rates
Delivery to major destination ports
Shipping coordination and tracking

Packaging & shipment details FOB vs CIF: a buyer's guide to Incoterms

Supply Origins

Potassium Phosphite Solution is sourced from approved producers in these origins, matched to price, availability and your destination.

All fertilizer sourcing origins

Applications

Foliar spray for Phytophthora and downy mildew suppression in grape, avocado, citrus, and potato
Fertigation phosphonate programs for root rot prevention in high-value horticultural crops
Phosphorus and potassium foliar nutrition in fruit development programs
Biostimulant-mode application in integrated disease management (IDM) programs
Greenhouse and nursery crop protection and nutrition programs
Tank-mix addition with fungicides for enhanced uptake (compatibility confirmed per program)

How to Procure Potassium Phosphite Solution from G & E Fertilizers

A simple and transparent process for international buyers.

01
Send Requirement
Product, quantity, destination and preferred terms.
02
Receive Commercial Offer
Origin, price, Incoterm, offer validity and estimated shipment.
03
Confirm Specifications
COA, inspection requirements, packaging and documentation.
04
Contract & Shipment
Commercial documents, loading and global delivery support.

Buyer guides

Send Your Requirement

Documents & Compliance

Standard document set supplied with Potassium Phosphite Solution shipments.

Commercial Invoice
Packing List
Certificate of Origin
Certificate of Analysis (COA)
Bill of Lading
Inspection Certificate

Also where applicable: Safety Data Sheet (SDS/MSDS) · Technical Data Sheet (TDS) with application and compatibility guidance · Import documentation support depending on destination

Fumigation, phytosanitary and other destination-specific documents are arranged as your import rules require.

Export documentation explained

Quality You Can Trust

SGS and Intertek inspection can be arranged before shipment. We support specification verification, producer documentation and trade compliance requirements.

Learn About Our Quality Process

Frequently Asked Questions

What is the difference between potassium phosphite and potassium phosphate?

Potassium phosphite contains phosphorus in the phosphonate (P³⁺) form, which is systemic within the plant and associated with inducing plant defence responses. Potassium phosphate contains phosphorus in the phosphate (P⁵⁺) form, which is the standard plant-available P form. Phosphite is not interchangeable with phosphate as a sole phosphorus source but is widely used for its disease-suppression properties alongside standard phosphate nutrition programs.

Is Potassium Phosphite registered as a fertilizer or a plant protection product?

Regulatory classification varies by country. In many jurisdictions (EU, North America, Australia) potassium phosphite is registered as a fertilizer or biostimulant. In others it may require registration as a plant protection product due to its disease-control activity. Buyers are responsible for confirming the applicable regulatory classification in their destination market before import.

What is the MOQ for Potassium Phosphite?

IBC tote supply starts from approximately 5–10 MT per container shipment. ISO tank container enquiries are evaluated from approximately 20 MT. Smaller volumes may be available from European distributors. Please share your target volume, destination, and application program when enquiring.

What origins do you source Potassium Phosphite from?

We source from specialty fertilizer and phosphonic acid producers in Europe and China. European-origin phosphite typically carries detailed regulatory and quality certification. Chinese-origin is cost-competitive and available with independent inspection. Origin is confirmed at the time of quotation.

Can independent inspection be arranged for liquid Phosphite shipments?

Yes. SGS or Intertek inspection covering volume measurement, density verification, and sample collection can be arranged at load port. For specialty liquid products, inspection scope and logistics are agreed in advance and built into the contract.

What documentation is included with Potassium Phosphite shipments?

Every shipment includes a Commercial Invoice, Packing List, Certificate of Origin, Certificate of Analysis, Safety Data Sheet, Technical Data Sheet, and Bill of Lading. Additional regulatory or import documents required by the destination authority can be coordinated on request.

Product availability, pricing, origin, documentation, and shipment terms are subject to supplier confirmation, destination regulations, sanctions screening, and contract agreement.