People who search for calcium lignosulfonate side effects usually want to know whether it is hazardous to handle, whether it is safe in food or feed, and what it does in the environment. This page summarises what our MSDS and the main regulatory assessments say.
Handling: what the MSDS says
Our MSDS states that calcium lignosulfonate is not classified as hazardous under normal industrial handling based on available data. The fine powder can cause temporary mechanical irritation of the eyes, skin and airways, so normal dust precautions apply: eye protection, dust masks where dust is generated, and good ventilation. Keep it away from strong oxidising agents and store it dry. Download the MSDS from the calcium lignosulfonate product page.
Food and feed assessments
| Body | Assessment | Scope |
|---|---|---|
| JECFA (FAO/WHO Joint Expert Committee on Food Additives) | Evaluated calcium lignosulfonate (40-65) and set an acceptable daily intake (ADI) of 0 – 20 mg/kg body weight | Applies to the food-grade material meeting the JECFA specification, not to industrial grades |
| EFSA FEEDAP Panel | Lignosulphonate considered safe up to 10,000 mg/kg complete feed for the assessed animal categories; not a skin or eye irritant; dust inhalation considered a hazard for workers | Feed additive use |
| EU Regulation (EU) 2024/749 | Authorises lignosulphonate as a feed additive (binder) with maximum contents in complete feed | Feed use in the EU |
| US 21 CFR 573.600 | Permits lignin sulfonates in animal feed within stated limits | Feed use in the US |
Industrial grades are not food or feed grades. Use food- or feed-designated grades with the matching documents for those applications.
Environmental points
- Lignosulfonate is water-soluble and adds organic load (oxygen demand) and colour to water, so prevent concentrated product and runoff from entering drains or watercourses.
- Effects on aquatic life depend on concentration and exposure; follow local discharge rules and the MSDS.
- It is a wood-derived product, but “bio-based” alone does not prove that a specific use is harmless; assess each application.
Earlier versions of this page made general claims about toxicity, eutrophication and bioaccumulation without citing studies. We have replaced them with the assessments above.
Frequently Asked Questions
Is calcium lignosulfonate toxic?
Our MSDS does not classify it as hazardous under normal industrial handling. JECFA set an ADI of 0 – 20 mg/kg body weight for food-grade calcium lignosulfonate (40-65). The main handling issue is dust.
Is calcium lignosulfonate safe in animal feed?
EFSA considered lignosulphonate safe up to 10,000 mg/kg complete feed for the assessed categories, and the EU authorises it as a feed binder under Regulation (EU) 2024/749. Use a feed-grade product.
What precautions are needed when handling it?
Avoid breathing dust, wear eye protection, keep it dry and away from strong oxidisers, and prevent concentrated product from reaching drains or watercourses.
