Copper lignosulfonate (GAC-CuLS) is a water-soluble, chelated copper-lignosulfonate micronutrient supplied as a yellow-brown powder for agricultural foliar-spray and irrigation formulations. This guide reviews the supplier-reported technical data and the checks needed before formulation or field use.
Supplier-Reported Technical Data
| Parameter | TDS value | Interpretation note |
| Appearance | Yellow-brown powder | Confirm physical form on receipt. |
| Dry matter | 95% min | Use an actual batch result for calculations. |
| Water-insoluble matter | 1.0% max | Confirm filtration/test method. |
| Sulfate | 2% min | Source minimum notation retained; confirm reporting basis. |
| Total copper | Approximately 3% | Approximate total-content reference, not a minimum, soluble-Cu assay or plant-availability result. |
| Lignosulfonate | 55% min | Confirm analyte definition and test method. |
| Moisture | 7% max | Interpret together with dry matter using consistent methods and an actual batch COA. |
These are typical production values for reference, not binding specifications. Obtain an agreed current specification and an actual batch COA before acceptance.
Applications
This grade is intended for foliar-spray and irrigation fertilizer formulations. Copper is a cofactor for several plant enzyme systems associated with lignin synthesis, photosynthesis and respiration, and is involved in carbohydrate and protein metabolism; these are general plant-nutrition roles of copper, not performance claims specific to this grade. Total copper content does not by itself establish water-soluble fraction, chelation status or crop availability. Suitability, dosage and compatibility for a given formulation should be confirmed through formulation trials for the intended system rather than assumed from this general description.
Packaging and Storage
Standard packaging is a 25 kg woven bag with polyethylene liner. Customized packing is available on request. Store sealed in a cool, dry, well-ventilated area. Shelf life is 24 months in the original unopened packaging.
Product Documentation and Supply Enquiries
Batch COA, TDS, SDS/MSDS, samples, packaging options and commercial quotations are available on request. Contact info@greenagrochem.com or use the contact form.
