Alkylnaphthalene Sulfonate Soil Penetrant Surfactant
CAS Number: 36290-04-7
Alkylnaphthalene sulfonate (ANS) is an anionic surfactant used as a soil penetrant, wetting agent, and dispersant in soil-applied herbicide and fumigant formulations. It reduces water surface tension and soil hydrophobicity, allowing aqueous pesticide solutions to penetrate compacted or water-repellent soils more effectively. ANS is particularly effective in pre-emergent herbicide formulations and post-plant soil fumigation programs where uniform soil penetration is critical for efficacy.
Technical Specifications
| appearance | Light brown to dark amber liquid or paste |
| moisture (%) | ≤5 |
| pH (1% solution) | 6.5–8.5 |
| active ingredient (%) | ≥85 |
| surface tension (mN/m, 0.1%) | ≤32 |
| Draves wetting time (0.1%, s) | ≤30 |
Applications
- Pre-emergent herbicide soil penetration enhancer
- Soil fumigant distribution improver
- WP and WG soil-applied formulation wetting agent
- Dispersant for soil-applied pesticide sprays
- Irrigation water surfactant for improved soil wetting
Key Features
- Excellent soil penetration in hydrophobic and compacted soils
- Stable across a wide temperature and pH range
- Compatible with anionic and non-ionic surfactant systems
- Proven performance in pre-emergent corn and soybean herbicide programs
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CAS Number
36290-04-7
Category
Agricultural / Crop ChemicalsAvailability
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