Division note: Agricultural and organic-crop applications are managed by ChinaLignin, Green Agrochem’s agriculture division. LigninCorp retains this URL as a carefully qualified regulatory and technical routing page.
Can calcium lignosulfonate be used in organic crop production?
Potential use depends on the applicable organic standard, the intended function, the complete product composition and acceptance by the certifier or input-review body. A bio-based origin does not by itself make every calcium lignosulfonate product, formulation or use automatically compliant.
Under the United States National Organic Program, lignin sulfonate appears in 7 CFR §205.601(j)(4) for use as a chelating agent or dust suppressant in crop or soil amendments. This listing is function-specific. It should not be rewritten as unrestricted approval for soil conditioning, foliar nutrition, pesticidal claims or every formulated product.
Regulatory evidence
- USDA Agricultural Marketing Service: Lignin Sulfonate — official review and rulemaking history.
- USDA/NOSB Technical Report: Lignins — identifies lignin sulfonate and the chelating-agent and dust-suppressant annotation.
- USDA National List overview — explains how allowed and prohibited substances are evaluated in organic production.
For the European Union and other markets, confirm the current regulation, national implementation, input category, impurities, co-formulants, label claims and certifier decision before sale or use. This page does not represent product certification or legal approval.
Current agriculture-grade product data
The figures below come from Calcium Lignosulfonate — Agri-Grade, product code GAC-CaLS-AGRI, TDS Rev. 2.0. The document describes them as typical production results for reference; request the signed shipment COA for batch-specific results.
| Parameter | TDS value | Status and buyer use |
|---|---|---|
| Appearance | Yellow-brown powder | Typical physical form |
| pH | 4–7 | Typical range; confirm test basis |
| Dry matter | 95% min | Typical production limit |
| Water-insoluble matter | 0.2% max | Typical production limit |
| Sulphate | Around 5% | Typical value; relevant to formulation and input review |
| Total calcium and magnesium (sulfate) | 5–6% | Typical range; do not convert automatically into a crop nutrient claim |
| Total NPK | Around 10% | Typical value; method, nutrient forms and label eligibility require confirmation |
| Lignosulphonate content | 60% min | Typical production limit |
| Sugar | 15% | Typical value |
| Moisture | 7% | Typical value |
Application figures: how to use them correctly
Supplier-recommended starting trial range: GAC-CaLS-AGRI TDS Rev. 2.0 lists 0.1–1% for wetting/spreader-sticker evaluation and a 1–3% solution for soil-conditioner evaluation. These figures apply only as starting points for this exact grade. Confirm the percentage basis in writing and validate the actual mixture, water, soil, crop, application equipment and acceptance tests. They do not establish organic eligibility or guaranteed agronomic performance.
The older page also listed 0.5–2% soil incorporation, 5–10% soil solutions, 0.1–0.5% foliar use and various dust-control rates. Those values are not supported by the current exact-grade TDS and therefore are not presented as Green Agrochem recommendations.
Organic-input qualification checklist
- Identify the exact product code, manufacturing process and every intentionally added ingredient.
- Obtain the current TDS, MSDS/SDS, signed batch COA and impurity information.
- Define the claimed function and confirm that it matches the permitted annotation.
- Submit the complete formulation to the farm’s certifier or recognized input-review body before use.
- Confirm local fertilizer, pesticide, labelling and registration requirements separately from organic certification.
Continue with ChinaLignin
See Calcium Lignosulfonate in Organic Crop Production for the agriculture-specific discussion, or review the ChinaLignin application hub. Request current documents and grade review at info@greenagrochem.com.
