SNF 20% Sodium Sulfate Grade is the higher-sulfate commercial option in the LigninCorp SNF range for concrete and cement formulations whose approved specification permits this grade.
Product identity: Sodium naphthalene sulfonate formaldehyde condensate (SNF/PNS), CAS 36290-04-7, brown to dark-brown powder.
Selection point: The 20% designation describes a sodium sulfate grade limit; it is not a dosage recommendation or a guaranteed performance percentage. Suitability must be established in the customer’s complete formulation.
Where the 20% Grade Fits
Cost-Sensitive Systems
A candidate for approved formulations where the higher sulfate grade is acceptable and procurement economics are an important selection factor.
Cement Dispersion
Provides the characteristic anionic dispersing mechanism of SNF, subject to cement chemistry and admixture compatibility.
Controlled Grade Identity
Orders, TDS and COA should all state the 20% grade explicitly to prevent substitution with lower-sulfate variants.
Trial-Based Approval
Laboratory and plant trials should confirm workability, retention, setting, air content and strength before routine production.
Reference Specification
| Parameter | Reference value |
|---|---|
| Appearance | Brown to dark-brown powder |
| Sodium sulfate (Na2SO4) | 20% maximum |
| Solids content | 91% minimum |
| Net starch fluidity | 210 mm minimum |
| Chloride content | 0.5% maximum |
| pH | 7–9 |
Reference values are tied to the current product TDS. The agreed sales specification and batch COA govern supply. Confirm test methods, units and document revision during qualification.
Recommended Qualification Steps
- Confirm that the project and formulation permit the 20% sodium sulfate grade.
- Request current TDS, SDS/MSDS and a representative COA.
- Select a starting trial level from the current TDS rather than from generic web dosage figures.
- Test with the actual cement, SCMs, water and companion admixtures.
- Approve performance limits and lock the exact grade in the procurement specification.
Compare Before Specifying
Review the 5% low-sulfate SNF grade when tighter salt control is required, or the 18% standard grade for a different balance of specification and economics. See the SNF product-family overview and concrete admixture applications for selection context.
Request Current Grade Documentation
Send the required sulfate limit, cement system, target performance, annual volume, packaging and destination port to info@greenagrochem.com. Download the current TDS or download the SDS/MSDS.