Ethyl stearate (CAS 111 - 61 - 5) is an organic compound with the chemical formula C₂₀H₄₀O₂. It is the ethyl ester of stearic acid. This product is presented as a colorless to slightly yellowish liquid or waxy solid at room temperature, depending on the purity and surrounding conditions. It has a mild, characteristic odor.
The molecular weight of ethyl stearate is approximately 312.53 g/mol. Its density is around 0.868 g/cm³ at 20°C. The melting point ranges from 34 - 38°C, and the boiling point is about 215 - 217°C at 15 mmHg. It is insoluble in water but soluble in most organic solvents such as ethanol, ether, and chloroform.
Ethyl stearate has a wide range of applications across different industries.
In the cosmetic industry, it is commonly used as an emollient. It can soften and smooth the skin by forming a thin, protective film on the skin surface, preventing moisture loss. It is also added to lipsticks, lotions, and creams to improve their texture and spreadability, providing a silky - smooth feel to the final product.
In the food industry, it serves as a flavoring agent and a food additive. It can impart a fatty, waxy flavor to certain food products. Additionally, it is used as a lubricant in the manufacturing of food packaging materials to prevent sticking.
In the chemical industry, it is used as a solvent for various resins, waxes, and oils. It can also be used in the synthesis of other chemicals, serving as an intermediate in the production of some surfactants and plasticizers.
When using ethyl stearate in the cosmetic industry, it should be added to the formulation during the mixing process. The recommended dosage typically ranges from 1% - 10% depending on the specific product and desired properties. It should be heated to its melting point (around 35 - 40°C) before mixing to ensure uniform dispersion in the formulation.
In the food industry, it should be used in accordance with the relevant food safety regulations. The maximum allowable dosage is strictly regulated by food safety authorities. It should be added during the food production process at an appropriate stage to ensure proper incorporation and flavor development.
In the chemical industry, when using it as a solvent, the solubility of the solute should be considered. It is usually added slowly to the solute while stirring to achieve complete dissolution. When used as an intermediate in chemical synthesis, the reaction conditions such as temperature, pressure, and catalysts should be carefully controlled according to the specific reaction requirements.
Case 1: Cosmetic Cream Production
A cosmetic company was facing issues with the texture and moisturizing effect of their cream. They decided to incorporate ethyl stearate into their formulation. By adding 5% ethyl stearate and following the proper mixing procedure, the cream became smoother and more spreadable. Customers reported that their skin felt softer and more hydrated after using the cream. The sales of the cream increased significantly as a result of the improved product quality.
Caso 2: Aromas alimentarios
A food manufacturer wanted to enhance the flavor of their margarine product. They added a small amount (less than 1%) of ethyl stearate as a flavoring agent. The margarine acquired a more natural, buttery flavor. Consumer taste tests showed that the new - flavored margarine was well - received, leading to an increase in market share for the product.
Caso 3: Síntesis química
A chemical research institution was conducting a project to synthesize a new type of plasticizer. Ethyl stearate was used as an intermediate. By carefully controlling the reaction temperature at 60°C and using an appropriate catalyst, they successfully synthesized the target plasticizer with high yield. The new plasticizer showed excellent performance in improving the flexibility and durability of plastics.
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