Agrochemical Surfactants for EC, EW, SC, SE and ME Formulations
Use this hub to match agrochemical surfactants to the job they must perform: emulsification, wetting, dispersion, penetration or foam control. Start with the formulation type, then verify the active ingredient, solvent system, water hardness and stability target.
Direct answer: Agrochemical surfactants are formulation auxiliaries used to keep pesticide concentrates stable and help diluted sprays wet, spread and penetrate the target surface. EC and EW systems mainly need emulsification; SC and SE systems depend more heavily on wetting and dispersion; tank-mix applications use spray adjuvants to improve coverage and retention. Selection and testing should follow the applicable FAO/WHO pesticide specification guidance and CIPAC formulation definitions.Technical review: Grace Dou · Last reviewed 13 August 2026.
Product specifications
Review Kemaix 600#, BY, 400# and 1601# nonionic emulsifier families and request grade-specific technical data.
Formulation selection
Compare the different stability demands of EC, EW, SC, SE and ME formulations before screening a blend.
Tank-mix performance
Separate in-can formulation auxiliaries from adjuvants added to the spray tank for wetting and penetration.
Match the Surfactant Function to the Formulation Type
| Formulation | Primary surfactant task | What to screen | Recommended next page |
|---|---|---|---|
| EC | Spontaneous emulsification after dilution | Nonionic/anionic balance, solvent compatibility and emulsion stability | EC selection logic |
| EW | Stabilise a pre-formed oil-in-water emulsion | Required HLB, droplet size and storage stability | HLB selection guide |
| SC / SE | Wet and disperse solid active particles | Particle wetting, dispersion, viscosity and foam | Surfactant test methods |
| ME | Build a clear or translucent microemulsion | Solubilisation window, co-surfactant and dilution tolerance | Available emulsifier families |
| Tank mix | Improve wetting, spreading, retention and penetration | Leaf surface, water quality, crop safety and spray volume | Request application support |
A Practical Four-Step Screening Workflow
Define the system
Record formulation type, active ingredient concentration, solvent or carrier, water phase and target dilution.
Assign each function
Separate emulsification from wetting, dispersion, penetration and foam control instead of asking one surfactant to solve every task.
Screen compatibility
Check concentrate clarity or particle stability, dilution behaviour, hard-water tolerance, temperature cycling and foam under realistic mixing.
Validate performance
Run accelerated storage and application trials at the intended dose. Final selection should follow measured stability and field performance.
Frequently Asked Questions
Is an agrochemical emulsifier the same as a spray adjuvant?
No. An emulsifier is normally built into the pesticide formulation to maintain stability during storage and dilution. A spray adjuvant is commonly added to the tank to improve deposition, wetting, spreading or penetration.
Can the same surfactant be used in EC and SC formulations?
Not automatically. EC systems need reliable emulsification of an oil/solvent phase, while SC systems depend on particle wetting and dispersion. Their test methods and failure modes are different.
What information is needed for a grade recommendation?
Provide the formulation type, active ingredient, concentration, solvent or carrier, water quality, target dose, storage conditions and the failure you are trying to correct.
Need a Shortlist for Your Formulation?
Send the formulation type, active ingredient, solvent system and stability target. Kemaix can recommend candidate surfactant families and arrange TDS, COA and evaluation samples.