Agricultural Liquid Potassium Formate
CAS NO.: 590-29-4
Molecular Formula: HCOOK
Molecular Weight: 84.12
Character: Colorless transparent liquid.
Usage:
1. It is widely used in oil field industry as drilling fluid with excellent performance;
2. As the camouflage acid in the leather industry;
3. As reducing agent in print and dyeing industry;
4. As road snow melting agent, early strength agent of cement paste, and in carbon black manufacture, leaf fertilizer and other industries.
Package: 1000L IBC tank or Flexibag.
Storage: It should be stored in a dry and ventilative warehouse, kept away from heat and moisture during transportation, unloaded with care so as to avoid damage. Furthermore, it must be stored separately from poisonous substances.
- Product Description
Agricultural Liquid Potassium Formate | Chloride-Free Liquid Potassium Fertilizer Solution for Precision Agriculture
Agricultural Liquid Potassium Formate (HCOOK, CAS No. 590-29-4) is a colorless, transparent liquid potassium source with a molecular weight of 84.12. Produced by Shanxi Zhaoyi Chemical Co., Ltd. —A company with over 30 years of experience and 150,000 tonnes of annual output, this product provides highly soluble, chloride-free potassium to crop productivity. Perfect for fertigation, precision agriculture, and foliar sprays. ±0.5% batch-to-batch concentration accuracy, < 0.05% insoluble matter, and < 50 ppm chloride levels for consistency and crop safety.

Technical Specifications
Parameter | Standard Value |
Assay (Potassium Formate Content) | ≥75% |
OH- Content | ≤0.3% |
CO3 Content | ≤0.5% |
Cl- Content | ≤0.2% |
CAS Number | 590-29-4 |
Molecular Formula | HCOOK |
Molecular Weight | 84.12 g/mol |
Appearance | Colorless transparent liquid |
Specific Gravity | 1.56-1.58 g/cm³ (at 20°C) |
pH Value | 8.5-10.5 (10% solution) |
Insoluble Matter | <0.05% |
Heavy Metals (as Pb) | <10 ppm |

What Is Agricultural Liquid Potassium Formate?
A stable, highly soluble HCOOK molecule is created by mixing formic acid with potassium hydroxide to make potassium formate liquid fertilizer. This agricultural potassium formate solution dissolves potassium fully, making it suitable to use. MOP and SOP are solid sources of potash.
The formate anion acts in a dual capacity in the field. It provides potassium directly to plant tissue . As it decomposes in the rhizosphere, CO2 and water are released and soil microbes benefit. This boosts root zone health and nutrient recycling.
Very low salt index reduces high-chloride fertiliser soil salinity and leaf burn. It helps chloride-sensitive crops including tobacco, berries, grapes, and greens.
Key Product Characteristics
The agricultural potassium formate solution from Shanxi Zhaoyi Chemical offers several performance advantages that distinguish it from standard liquid potassium products.
Chloride-free formula. Chloride concentration is confirmed at < 50 ppm by ion chromatography. This is important to producers who are growing chloride-sensitive crops, or those who are under regulatory constraints on chloride inputs.
Low salt content. It is suitable for fertigation in cold weather because to its low crystallisation temperature, which guarantees uniform performance without clogging drip emitters or nozzles. This is a simple solution to one of the most common operational problems with drip irrigation systems.
High bioavailability of potassium. The liquid formulation is totally dissolved so it is evenly distributed and continuously absorbed in the root zone, resulting in less loss of nutrients than granular formulations.
Batch uniformity. Shanxi Zhaoyi Chemical uses agricultural-grade purification technology to control the concentration error within ±0.5% across batches, so that the performance is predictable in each growing season.
Few insolubles. Gravimetric filtration testing ensures insolubles are less than 0.05% to avoid irrigation gear blocking and wear, including high-pressure nozzle tips and emitters.

Application Scenarios
Many agricultural production systems need accurate potassium supply and crop safety, making Agricultural Liquid Potassium Formate ideal.
A low crystallisation temperature and near-nil insoluble content make it ideal for drip systems. It flows freely through emitters without crystallisation or blockage during cooler growing seasons.
Leaf applicationThe low salt, chloride free mix is far less likely to cause leaf burn and is safe to use on sensitive crops at suggested dilution rates. It enables for a tailored repair of potassium deficit throughout the most essential periods of plant development.
Liquid fertiliser programs, blended.Compatible with various nutrient solutions Potassium formate liquid fertiliser may be added to bespoke NPK liquid programs. Shanxi Zhaoyi Chemical can advise on application ratios according to your kind of crop and development stage.
Growing Conditions: Cool Climate The low crystallisation temperature enables you to work to fertigation plans in colder regions without worrying about the product solidifying in storage tanks or supply lines.
Agricultural Liquid Potassium Formate vs Other Products
Feature | Liquid Potassium Formate | Potassium Chloride (MOP) | Potassium Sulfate (SOP) |
Chloride Content | ≤0.2% (Safe for sensitive crops) | 47% (Risk of toxicity) | <2.5% (Moderate safety) |
Solubility | 100% instant | Slow dissolution | Moderate dissolution |
Salt Index | Very Low (1.8) | High (116) | Moderate (46) |
Application Method | Drip/Foliar/Fertigation | Broadcast/Banded | Broadcast/Dissolved |
Cold Temperature Performance | Effective below 10°C | Reduced uptake | Reduced uptake |
Soil pH Impact | Neutral | Acidifying | Acidifying |
Irrigation System Compatibility | Perfect (no clogging) | Residue buildup | Partial compatibility |
Microbial Activity Support | Enhances with CO2 release | Neutral | Neutral |
Price Point | Premium | Low | Moderate |

Certifications & Compliance
Shanxi Zhaoyi Chemical Co., Ltd. holds internationally recognized management system certifications supporting quality assurance, environmental responsibility, and workplace safety.
- ISO 9001 — Quality Management System Certification
- ISO 14001 — Environmental Management System Certification
- ISO 45001 — Occupational Health and Safety Management System Certification
Kosher Certification
Halal Certification (for applicable product grades)
The company supports on-site factory audits by domestic and international customers. Multilingual documentation — including MSDS, COA, and trade compliance records — is available to support your procurement and regulatory requirements.

Quality Control and Testing Standards
Professional buyers sourcing product should verify the following quality metrics before committing to a supplier.
Purity validation. Potassium formate content is confirmed through HPLC or titration methods to meet the 74%–75% concentration standard. This prevents misrepresentation of potassium content, which remains a known issue in the market.
Heavy metal screening. ICP-MS testing for lead (Pb), cadmium (Cd), arsenic (As), and mercury (Hg) ensures fertilizer safety according to EU REACH and AAPFCO regulations.
Verifying specific gravity. If product density matches concentration charts, hydrometer testing may rule out adulteration or underdosing.
Biocontaminant and sodium screening. Ion chromatography ensures the product fulfills ag-grade safety criteria for sensitive crop applications and is free of dangerous biological contaminants.
Shanxi Zhaoyi Chemical can supply COA, MSDS, and third-party test results upon request from its full batch records.

Why Source from Shanxi Zhaoyi Chemical?
Since 1988, Shanxi Zhaoyi Chemical has perfected its production and supply chain processes. With an annual capacity of 150,000 tons of acetate and formate products, the 27,000 m² plant ensures consistent supply of large quantities.
Rapid service. General questions will be answered within 2 hours. We can ship stock orders within 24 hours. We are here to answer any technical questions you may have, 24 hours a day.
OEM and flexible packaging The products are offered in 1000 L IBC tanks and Flexibags. We provide OEM labeling, unique formulas, and multilingual documentation assistance to meet your market needs.
Competitive prices. The organization can provide reduced pricing, thanks to large-scale manufacturing and better logistics, without any loss of quality and batch consistency.
Exportable Products are sent to Europe, North America, Asia and other areas. The personnel are specialists in export paperwork, customs clearance and trade compliance.
FAQ
Q: What's the difference between the product and the potassium chloride fertilizer?
A: Potassium chloride contains chloride ions that may harm chloride-sensitive crops and add to soil salinity over time. The product is chloride-free (< 50 ppm Cl⁻), safe for crops like tobacco, berries and grapes and reduces the danger of soil compaction and salinization.
Q: Is this product suitable for drip irrigation systems?
A: Yes. The insoluble matter is under 0.05% and the low crystallization temperature enables the solution to be stable and free flowing in drip lines and emitters even at lower temperatures. It is well suitable for fertigation applications.
Q: How is the potassium formate content verified?
A: Verify potassium formate concentration by HPLC or titration to ensure the 74%-75% criteria is satisfied. Hydrometer testing for specific gravity also gives another field-level verification check against dilution.
Q: Is the product safe for chloride sensitive crops?
A: Yes. Chloride levels are below 50 ppm, substantially below the threshold for chloride sensitive crops as confirmed by ion chromatography tests. It is well suited to tobacco, berries, leafy vegetables and similar crops where chloride build up is an issue.
Q: Do you have several packaging alternatives and can you do bespoke packaging?
A: Normal packing is 1000 L IBC tank or Flexibag. We may provide customised package forms, OEM labelling and specs matched to your volume needs and target market.
Q: What documentation do you supply for import compliance?
A: Shanxi Zhaoyi Chemical offers COA, MSDS and compliance documents in several languages. The staff can provide assistance with chemical import and export processes, shipping documentation and customs clearance.
Contact Us
Reach our technical and sales team at sxzy@sxzhaoyi.com — responses within 2 hours on business days for Agricultural Liquid Potassium Formate.
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