Depends on your formulation.
@Abdullah SLES/SLS have shorter alkyl chain lenght and lower ethoxylation, compared to common anionic emulsifiers used in emulsions (that's why they are used more as detergents, not to mention the amount of foam they'll cause during the emulsion process). Chances are your SLES/SLS would reside more in the water phase of your emulsion, and won't do much to stabilize it. If you want to use an anionic surfactant to stabilize your emulsion, there are few to choose from, which are more common in those type of systems.
Sodium Cetearyl Sulfate is very common.Alkyl phosphate or acyl methyltaurate is common too.
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