Emulsifier A-110 (oleic acid polyoxyethylene ester, OEO-110) is a nonionic surfactant with an HLB value between 11 and 12. It is a light yellow to yellow liquid (or paste) at room temperature, easily soluble in water, and particularly adept at emulsifying and dispersing O/W (oil-in-water) systems. Regarding the question of how to correctly use and add it, it is first necessary to clarify that the optimal dosage of emulsifier A-110 in a formulation is not fixed. It directly depends on the type of oil to be emulsified, the oil-water ratio, the required emulsion type, and the specific performance requirements of the end product.
In the early stages of formulation design, it is recommended to use the "HLB value matching method" for screening. That is, by blending A-110 with other high and low HLB value emulsifiers, the HLB value of the composite emulsifier matches the HLB value required by the target oil phase. Typically, the initial dosage of emulsifier is set within the range of 5% to 20% of the oil phase weight for gradient experiments. For low-viscosity emulsions requiring high fluidity, a lower dosage may be used; for high-demand systems requiring long-term stability and fine particle size, the dosage should be appropriately increased or co-emulsifiers should be added.
In terms of usage method, emulsifier A-110 has both hydrophilic and lipophilic properties and can be flexibly added according to process convenience. The most common method is to directly add the emulsifier to the water phase and stir evenly, then slowly add the oil phase under high-speed shearing or homogenization. Its "low foaming tendency" and "high emulsifying power" quickly form a stable and fine emulsion. In cosmetics production, it can also be dissolved in the oil phase, heated to 75-85℃, and then mixed with the water phase at the same temperature.
The following key parameters closely related to formulation design are for your reference (data source: Guoli Chemical Product Database):
| Parameter Item | Technical Index |
|---|---|
| Ion Type | Nonionic |
| HLB Value | 11~12 |
| Active Content (%) | ≥99 |
| pH Value of 1% Aqueous Solution (25℃) | 5.0~9.0 |
| Cloud Point (℃) | 75~85 |
| Surface Tension (1%, 25℃, mN/m) | Approximately 30 |
| Density (25℃, g/cm³) | Approximately 1.00 |
| Appearance (Room Temperature) | Light yellow to yellow liquid or paste |
According to the application practices of emulsifier A-110 in different industries, the following are reference addition amount ranges for preliminary experiments (source: industry general formulation experience; please note that this range is not an absolute standard and requires self-verification in actual operation):