Calcium lignosulfonate (also spelled calcium lignosulphonate; CAS 8061-52-7) is a family of water-soluble lignin-derived calcium salts supplied in multiple grades. This short URL is maintained as a grade map and buyer routing page. For current commercial specifications, packaging, documents and quotations, use the Calcium Lignosulfonate product page.
Why grade identity matters
Commercial lignosulfonates are complex, polydisperse materials rather than one small molecule with a single molecular formula or molecular weight. Their colour, pH, solids, insolubles, sulfate, sugars, ash, calcium/magnesium profile and functional performance vary with feedstock, process, purification and grade design. A value from one grade must not be copied to another.
Green Agrochem calcium lignosulfonate grade map
| Grade family | Product code / identity | Primary evaluation direction | Correct division |
|---|---|---|---|
| General grades | GAC-CaLS-1, GAC-CaLS-2, GAC-CaLS-3, GAC-CaLS-4 | Compare colour, insolubles, lignosulfonate, mineral profile and application fit | LigninCorp |
| Construction grade | GAC-CaLS-Construction | Concrete and mortar compatibility, water demand, workability and set behaviour | LigninCorp |
| Dispersant grade | GAC-CaLS-Dispersant | Particle wetting, viscosity, suspension and redispersibility | LigninCorp or the application owner |
| Emulsifier grade | GAC-CaLS-Emulsifier | Emulsion, wetting, adhesion and rheology screening | Route by formulation market |
| Dust-control grade | Application-specific calcium grade | Surface binding, traffic, climate and reapplication requirements | LigninCorp |
| Light-colour / Super grade | GAC-CaLS-Light / GAC-CaLS-Super | Colour-sensitive or upgraded-property applications; verify the exact TDS | LigninCorp |
| Agriculture grade | GAC-CaLS-AGRI | Fertilizer, soil and crop formulation trials | ChinaLignin |
| Feed / feed-binder grade | GAC-CaLS-Feed / GAC-CaLS-FB | Feed processing and pellet-binding evaluation with market documentation | LigninChina |
Industrial application selection
- Concrete and cement: evaluate the construction grade in the actual cementitious system. Record dosage on total cementitious material and distinguish as-supplied product from dry solids.
- Ceramics and refractories: evaluate dispersion, slurry viscosity, green strength, drying and firing response using the actual mineral body.
- Minerals and granulation: evaluate wet and dry strength, moisture demand, compaction, abrasion and downstream processing.
- Dust control: evaluate surface material, dilution, application rate, penetration, curing, rainfall, traffic and reapplication criteria.
- Other dispersions: select by particle surface, pH, salts, solids, shear and storage rather than assuming one universal grade.
Explore the LigninCorp industrial application hub or the technical-document library for application-specific routes.
Legacy figures: evidence status
The former page mixed generic literature-style numbers with agricultural claims. They are retained below for traceability, but they do not describe every calcium lignosulfonate grade.
| Legacy figure or claim | Evidence/status | Public-use decision |
|---|---|---|
| Molecular weight 800–10,000 | Source and analytical method not supplied; commercial material is polydisperse | Do not use as a universal specification |
| Up to 30% reducing sugars | Grade not identified | Use the current exact-grade TDS/COA instead |
| pH about 3–11 for a 1% solution | Overly broad and grade-specific basis missing | Use the exact-grade range and stated test concentration |
| 1.01% calcium lignosulfonate in urea and 19.4% sulfur “wrapped” slow-release urea | Original formulation, calculation basis and source not verified | Not a supplier dosage or offered-grade performance claim |
| No poison, no residue, guaranteed soil fertility or yield benefit | Unsupported absolute safety and agronomic claims | Require exact SDS, regulatory review and controlled trials |
Buyer checklist
- State the application, substrate, process and target test.
- Select the exact product code before comparing numbers.
- Request the current TDS, MSDS/SDS and signed batch COA.
- Confirm whether each value is a limit, range, typical result or illustrative COA value.
- Define any starting dosage basis and validate it in laboratory and plant trials.
- Confirm packaging, shelf life, MOQ, lead time, Incoterm and destination requirements.
Contact info@greenagrochem.com for grade matching, samples and current documents.
