Home Chemistry How To Make Potassium Sorbate

How To Make Potassium Sorbate

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Potassium sorbate is a food preservative that is commonly used to prevent spoilage and extend shelf life. It is a white crystalline powder that is easily soluble in water. Potassium sorbate is often used in the production of wine, cheese, and other fermented foods.

Why Make Your Own Potassium Sorbate?

Making your own potassium sorbate is a great way to ensure that you are using a high-quality product. Additionally, making your own potassium sorbate can be more cost-effective than purchasing it from a store.

Materials Needed

To make potassium sorbate, you will need the following materials: – Potassium hydroxide – Sorbic acid – Distilled water – Glass beaker – Glass stirring rod – Thermometer – pH meter

Step-by-Step Instructions

Step 1: Dissolve Potassium Hydroxide

In a glass beaker, dissolve 25 grams of potassium hydroxide in 100 milliliters of distilled water. Use the glass stirring rod to mix the solution until the potassium hydroxide is completely dissolved.

Step 2: Add Sorbic Acid

Add 17 grams of sorbic acid to the potassium hydroxide solution. Stir the solution until the sorbic acid is completely dissolved.

Step 3: Check pH

Using a pH meter, check the pH of the solution. The pH should be between 7.5 and 8.0. If the pH is too low, add a small amount of potassium hydroxide until the pH is in the correct range.

Step 4: Heat the Solution

Heat the solution to 80°C and maintain the temperature for 10 minutes. Use a thermometer to monitor the temperature and adjust the heat source as needed.

Step 5: Cool the Solution

Remove the solution from the heat source and allow it to cool to room temperature. Once the solution has cooled, you should notice that it has thickened and become more viscous.

Step 6: Filter the Solution

Filter the solution through a fine mesh filter to remove any impurities.

Step 7: Store the Potassium Sorbate

Store the potassium sorbate in a clean, dry container. It is important to keep the potassium sorbate away from moisture and to store it in a cool, dark place.


Making your own potassium sorbate is a straightforward process that can be done with a few simple materials. By making your own potassium sorbate, you can ensure that you are using a high-quality product that will effectively preserve your food.