A sodium lignosulphonate solution must be specified by its commercial grade, solids content and intended formulation—not simply by its brown appearance or dilution ratio. For agricultural formulation work, distinguish the supplied concentrate, a prepared stock solution and the final fertilizer mixture. Their concentrations are not interchangeable.
This guide covers solution preparation, mass-balance calculations and qualification checks. It complements our sodium lignosulfonate product information and liquid lignosulfonate agricultural application guide. Industrial purchasing enquiries should use the LigninCorp liquid sodium lignosulfonate page.
Concentrate, stock solution and final mixture
| Material | What the concentration describes | What to confirm |
|---|---|---|
| Commercial liquid concentrate | The material delivered by the supplier | Exact product code, current solids test, density and reporting basis |
| Prepared stock solution | A concentrate diluted with water, or powder dissolved for controlled addition | Ingredient masses, powder moisture or liquid solids, mixing procedure and final stock mass |
| Final fertilizer formulation | The complete mixture after addition of nutrients, water and other ingredients | Whether addition is reported as supplied product, dry solids or a separately measured active fraction |
Total dry solids should not automatically be called pure lignosulfonate or active content. Use the composition and analytical definitions in the exact-grade documentation. A concentration stated as percent by mass is also different from percent by volume.
Documents to check before setting a specification
Request the current exact-grade TDS, product-specific SDS and a recent batch COA. Match the commercial name, product code, physical form and intended application across these documents. A generic product-family sheet or a COA template is not a batch result.
| Property | Reporting details needed | Use in qualification |
|---|---|---|
| Total solids or powder moisture | Mass basis, test method, specification or typical-value status | Calculate delivered dry solids and dilution water |
| Density | Units and measurement temperature | Convert a validated mass addition to pump volume |
| pH | As supplied or stated test dilution, temperature and method | Compare batches and assess formulation compatibility |
| Water-insoluble matter | Test preparation and filtration method | Assess sediment, filter loading and application equipment |
| Sodium and other salts | Analyte, units and dry or as-supplied basis | Account for their contribution to the complete formulation |
| Viscosity and storage guidance | Temperature, test conditions and exact-grade instructions | Select handling equipment and storage controls |
If the description and specification table disagree, obtain a corrected document before using either number for purchasing or production. Do not average conflicting values or transfer figures from a construction grade to an agricultural formulation.
Dilution calculation: a worked example, not a dosage recommendation
Illustrative assumptions only: suppose a concentrate has 40% total dry solids by mass and the preparation target is 100 kg of stock solution containing 10% total dry solids by mass. These values are chosen to demonstrate arithmetic; they are not Green Agrochem specifications or an application recommendation.
| Calculation | Result |
|---|---|
| Required dry solids: 100 kg × 0.10 | 10 kg |
| Concentrate required: 10 kg ÷ 0.40 | 25 kg |
| Additional water: 100 kg − 25 kg | 75 kg |
The general mass balance is concentrate mass = final stock mass × target solids fraction ÷ concentrate solids fraction. It assumes dilution with water only, no solids loss and consistent mass-based definitions. If other ingredients contribute solids, include them separately. For volumetric dosing, divide the calculated product mass by the measured density at the relevant temperature; do not assume a litre weighs a kilogram.
Preparing a trial stock
- Confirm the grade and calculate the batch by mass using the current solids or moisture result.
- Record the water source and its relevant quality measurements. Use the intended process water during compatibility trials.
- Follow the supplier’s mixing instructions for that grade. Establish the addition sequence and mixing conditions in a small trial before scaling up.
- Check for undissolved material, foam and sediment. Do not assume complete dissolution merely because the liquid looks uniform.
- Record the final mass, appearance, pH and any filtration or viscosity results required by the process.
- Label the stock with grade, lot, preparation date, solids basis and validated holding conditions.
Qualifying the complete agricultural formulation
A clear stock solution does not prove compatibility with fertilizer salts or other ingredients. Compare an untreated control and the existing formulation benchmark with the candidate grade, keeping the rest of the formulation and test conditions consistent. Define measurable acceptance criteria before testing.
- Check concentrate and use-dilution appearance, precipitation, sediment and redispersibility.
- Measure viscosity, filterability and handling behaviour under the intended process conditions.
- Assess storage stability and nutrient analysis using the methods required for the finished product.
- For granulation, measure granule quality and drying behaviour separately from liquid stability.
See the fertilizer formulation guide for the wider qualification workflow. Industrial soil stabilization or road dust suppression is not evidence of crop or soil-amendment performance.
How to report a recommended starting trial range
Use a numeric starting range only when it is supported by identified supplier guidance for the exact grade and application. State the denominator and whether the addition is as-supplied product or dry solids. Then validate it in the actual formulation, water, process and equipment.
Keep trial results separate from recommendations. Any claimed improvement needs its control, formulation, addition basis, test method and conditions. A result from concrete, ceramics or feed must not become an agricultural performance claim.
Handling and purchasing checklist
Use the exact product SDS for handling and storage instructions. Lignin-derived origin alone does not establish safety, food-contact status, feed suitability or agricultural approval. Confirm the documentation needed for the intended use and market.
For a quotation or sample, provide the intended function, fertilizer composition, delivery form, process-water information, addition equipment, acceptance tests, destination and required quantity. Contact the agriculture team or email info@greenagrochem.com for the current exact-grade documents.