Liquid Potassium Thiosulfate (KTS) 0-0-25-17S is a high-purity liquid potassium and sulfur fertilizer formulated for agricultural nutrient management, fertigation, and liquid fertilizer blending. The standard grade contains 25% soluble potash (K2O) and 17% total sulfur (S), supplying targeted nutrients without adding nitrogen or phosphate.
Technical Specification
|
Parameter |
Product Requirement / Typical Specification |
|
Product Name |
Liquid Potassium Thiosulfate |
|
Common Name |
KTS |
|
Fertilizer Grade |
0-0-25-17S |
|
Chemical Formula |
K2S2O3 |
|
Soluble Potash (K2O) |
25.0% min |
|
Total Sulfur (S) |
17.0% min |
|
Nitrogen (N) |
0% |
|
Phosphate (P2O5) |
0% |
|
Physical Form |
Liquid solution |
|
Appearance |
Clear, colorless to pale yellow liquid |
|
Density (20°C) |
1.46 - 1.49 g/cm³ |
|
PH (10% solution) |
6.5 - 8.5 |
|
Chloride (Cl-) |
≤ 0.5% |
Why Choose KTS for Potassium and Sulfur Supply
Targeted Nutrition: Delivers high-concentration K and S without altering N or P balances.
High Solubility: Fully liquid format allows seamless integration into fertigation and liquid blending systems.
Key Procurement Parameters: Nutrient content (K2O, S), density, pH, chloride limits, low-temperature crystallization threshold, solution stability, and batch-to-batch consistency.
Application Areas
Fertigation: Compatible with drip, micro-jet, and overhead sprinkler systems. Dosing rates should align with soil test data and crop demand.
Liquid Fertilizer Blending: Acts as a primary liquid K and S source for custom liquid NPK+S formulations.
Soil & Crop Nutrition: Delivers rapid-uptake nutrients directly to root zones without increasing soil salinity.
Foliar Applications: Enables foliar potassium and sulfur correction under controlled dilution rates and mild climatic conditions.
Compatibility and Mixing Guidelines
Compatibility is an important qualification step. Always complete a lab-scale jar test using field water prior to commercial mixing.
Qualification Sequence: Water quality check → Jar test → Visual evaluation → Short-term stability check → Extended storage evaluation → Commercial trial.
Key Variables: Mixing order, temperature, water hardness, and compatibility with calcium, acidic solutions, or micronutrients.
Quality Control & Traceability
Incoming Control: Assay and identity verification for raw materials before batching.
In-Process Control: Precise monitoring of reaction temperature, stoichiometric ratios, filtration clarity, and final concentration.
Finished Product Testing: Batch-specific analysis of K2O, S, density, pH, and chloride content.
Batch Traceability: Full lot tracking linked to production records and inspection reports for quality assurance.
Certificate of Analysis
|
Test Item |
Specification |
Typical Batch Result |
|
K2O Content |
≥ 25.0% |
25.2% |
|
Total Sulfur (S) |
≥ 17.0% |
17.1% |
|
Density (20°C) |
1.46 - 1.49 g/cm³ |
1.475 g/cm³ |
|
pH (10% solution) |
6.5 - 8.5 |
7.2 |
|
Appearance |
Clear, colorless liquid |
Pass |
|
Chloride (Cl-) |
≤ 0.5% |
0.12% |
Packaging & Supply Chain Logistics
1,000 L IBC Tote: ~1,460 kg Net Weight per tote (standard for automated industrial handling).
200 L Drum: ~290 kg Net Weight per drum (ideal for smaller blending setups).
Flexitank / Bulk Shipment: 20,000 - 24,000 kg per 20ft container (maximum freight efficiency).
Storage & Handling: Recommended storage between 5°C and 30°C in HDPE or stainless steel containers. Prevent exposure to sub-zero temperatures to avoid crystallization.
Supplier Qualification Matrix
|
Evaluation Area |
Key Criteria to Check |
|
Nutrient Quality |
Certified assays for K2O and S, low impurity (Cl-) limits |
|
Batch Consistency |
COA variance across multiple production lots |
|
Logistics & Supply |
Loading capacity per container, Incoterms (FOB/CIF), shipping lead times |
|
Technical Support |
TDS/SDS compliance, sample availability, and formulation guidance |
FAQ
Q: What is Liquid Potassium Thiosulfate (0-0-25-17S)?
A: It is a clear liquid fertilizer containing 25% soluble potash (K2O) and 17% sulfur (S), designed for fertigation and liquid fertilizer blending without introducing nitrogen or phosphate.
Q: What are the typical physical specifications of commercial KTS?
A: Standard KTS features a density of 1.46 - 1.49 g/cm³, a neutral-to-slightly-alkaline pH of 6.5 - 8.5, and a clear, colorless to pale yellow liquid appearance.
Q: What bulk packaging options are available for export?
A: KTS is typically supplied in 1,000 L IBC totes (~1,460 kg net weight), 200 L drums (~290 kg net weight), or Flexitanks (~20-24 MT per 20ft container) for bulk shipping.
Q: Can KTS be blended with calcium-containing liquid fertilizers?
A: Direct high-concentration mixing with soluble calcium can form insoluble calcium sulfate precipitates. Always conduct a lab jar test and verify the mixing sequence before full-scale production.
Q: What quality documents are available for import compliance?
A: We provide a comprehensive technical documentation package including Technical Data Sheets (TDS), Safety Data Sheets (SDS), batch-specific Certificates of Analysis (COA), and Certificates of Origin upon request.
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