Agro formulators who only speak EC / ME / SC miss half the delivery map. Oil dispersions, suspo-emulsions, emulsions in water and capsule suspensions each fail for different surfactant reasons—wrong HLB, weak mill wetting, or foam that blocks filling. Esteem supplies ethoxylate and emulsifier building blocks across these formats; this guide sorts OD, SE, EW and CS against the EC/ME/SC pillars already on the site so RFQs name the delivery form first.
Beyond EC, ME and SC
Emulsifiable concentrates, microemulsions and suspension concentrates dominate many agro RFQs—and Esteem already publishes deep guides for each. Regulatory and crop-safety pressure pushes more actives into aqueous or low-solvent formats: EW (emulsion in water), OD (oil dispersion), SE (suspo-emulsion) and CS (capsule suspension). The surfactant chemistry overlaps, but the process energy, crystal growth and bloom tests do not.
Existing pillars: EC backbone, ME surfactant selection, SC / WG surfactants. Adjuvant vs in-can: agrochemical adjuvants. Emulsion physics: emulsification and emulsifiers.
Format Map at a Glance
| Format | Continuous phase | Dispersed phase | Surfactant job |
|---|---|---|---|
| EC | Organic solvent | Active (dissolved) | Bloom emulsifier pack on dilution |
| ME | Water (clear/translucent) | Oil/active nano-droplets | Tight HLB, high surfactant load |
| SC / WG | Water (or dry for WG) | Solid particles | Mill wetting + dispersant + low foam |
| EW | Water | Oil droplets (pre-emulsified) | Emulsify + stabilize vs creaming/coalesce |
| OD | Oil | Solid active | Disperse solid in oil + tank emulsify |
| SE | Water | Solids + emulsified oil | SC wetting + EC-style oil bloom |
| CS | Water | Polymer microcapsules | Wet/disperse capsules, control foam |
EW — Emulsion in Water
EW ships as an oil-in-water emulsion concentrate. Versus EC, solvent load is lower and the emulsion already exists before the tank—so selection shifts from “instant bloom from solvent” to long-term droplet stability, freeze–thaw and dilution shock. Nonionic / anionic emulsifier pairs still matter; HLB must match the oil phase. Hard-water stress remains real—see hard water & bloom.
OD — Oil Dispersion
OD suspends micronized solid active in oil, then emulsifies that oily slurry into spray water. You need: (1) wetting/dispersing aids compatible with the oil continuous phase, and (2) emulsifiers that bloom the oil into hard or soft water without dumping the solid. Borrowing only an EC pack or only an SC pack usually fails one of those two jobs. Building blocks: emulsifiers, nonionic surfactants, and dispersing agents.
SE — Suspo-Emulsion
SE is the hybrid: SC-like solids plus an emulsified oil phase in one can. Mill the solids with low-foam wetters and polymeric or anionic dispersants; stabilize the oil with EC-style emulsifier logic. Foam during milling and cream in storage are the classic failure modes. Start from the SC surfactant guide, then add oil-phase emulsifier thinking from the EC emulsifiers article.
CS — Capsule Suspension
Capsule suspensions encapsulate active in a polymer shell for controlled release and safer handling. Surfactant roles are typically wetting the capsule surface, preventing agglomeration, and managing foam during manufacture and dilution—not dissolving active in solvent. Esteem does not sell finished consumer pesticides or capsule systems; we supply specialty surfactants that formulators build into registered CS products. Clarify whether the RFQ is capsule slurry auxiliaries versus SC milling aids.
How These Relate to Adjuvants
In-can emulsifiers and dispersants stabilize the concentrate. Tank-mix adjuvants (NIS, COC/MSO, silicone) change spray deposit on the leaf. Do not substitute a tank-mix silicone for an OD emulsifier package—or vice versa. Map: adjuvants, silicone spreaders, COC & MSO emulsifiers.
Common Mistakes
Calling every aqueous concentrate an “SC.” Using EC HLB pairs alone for OD solids. Skipping hard-water jars for EW. Ignoring foam during SE milling. Asking Esteem for a finished CS pesticide instead of surfactant building blocks. Omitting format code on the RFQ so samples start on the wrong desk.
How to Specify with Esteem
Write the CIPAC / trade format first (OD, SE, EW, CS, EC, ME, SC), then oil/solvent, solid %, hardness, temperature and APEO policy. Start at agriculture chemicals, emulsifiers, and VenAG EC packages when bloom is still the job. Custom synthesis supports make-to-spec ethoxylate blends when catalogue grades miss the format. Contact Esteem Industries with jar-test and mill criteria so OD/SE/EW/CS surfactant selection is engineered.