Citric acid is a weak type of acid that is naturally found in citrus fruits such as oranges and lemons. Due to its sour and pungent taste (as well as its neutralizing and preservative properties), it is very popular for use in a wide variety of products, such as beverages, food, pharmaceuticals, cosmetics, and cleaners. Although citric acid is usually sold as a solid (crystalline powder), you may prefer it in liquid form for certain purposes.
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Part 1 of 2: Preparing the Solution
Step 1. Buy citric acid in the form of a crystalline powder
This powder can be found in grocery stores, Middle Eastern goods dealers, grocery stores, health food stores, or grocery stores. Citric acid can sometimes be found in the canned food section, and is sometimes labeled "sour salt". Purchase a minimum of 450 grams of citric acid powder to produce a sufficient amount of solution.
Step 2. Make or buy distilled water
Many impurities and minerals are removed in the process of boiling and condensing distilled water.
Step 3. Use non-metallic or non-reactive equipment to carry out the process
Citric acid can react with a number of metals so it can be used to clean metals. That is why orange juice placed in a metal bottle will quickly have an unpleasant metallic taste.
Clean the equipment thoroughly before you use it to prevent contamination of the solution and the growth of mold
Step 4. Determine the required amount of citric acid powder and water to make the solution
The concentration level of the citric acid solution (high or low) will affect its strength, shelf life and manufacturing costs.
- High concentrations of citric acid solutions can be stored for a longer time than low concentrations. The ideal dose is 450 grams of citric acid powder and 470 ml of water.
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However, a low concentration solution, which is a mixture of 450 grams of powder and 950 ml of water can also be used and is more economical. The comparison of the amount of ingredients will also make it easier for you to make it because 30 ml of the solution will be equivalent to 14 grams of dry citric acid powder.
Step 5. Measure out the citric acid powder
Put 450 grams of citric acid powder in a non-metallic saucepan, and set aside.
Step 6. Boil distilled water
Bring an appropriate amount of water to a boil of your choice (450 or 950 ml) using a non-metallic saucepan.
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You can also use a microwave-safe container, but be careful when boiling water in the microwave. The water can be very hot and overflow from inside the container. Check the water frequently and wear oven mitts when removing it, and do this carefully so that the hot water doesn't spill. Also place a wooden stick or other similar object in the water before you heat it up. This is useful for pulling water bubbles so they don't form together.
Step 7. Pour boiling water over the powder, then stir continuously with a non-metallic spoon until all the powder is dissolved
Be careful of boiling water. You can also use a non-reactive tea kettle to do this.
Part 2 of 2: Storing Solutions
Step 1. Filter the resulting solution
Use filter paper or cheesecloth to filter the solution and place it in another non-metallic saucepan or bowl to separate out any undissolved citric acid crystals.
Step 2. Cool the solution to room temperature
Doing so will allow you to safely transfer the solution into the container. This will also prevent the tightly sealed plastic bottle from rupturing (or exploding) when the hot liquid inside cools down.
Step 3. Transfer the solution
Place the citric acid solution in a non-metallic airtight container. Make sure you clean the container thoroughly (by boiling a plastic or heat-resistant glass container for 5 to 10 minutes). Choose a container that can be tightly closed. Pour the solution into the container using a funnel.
Step 4. Store the citric acid solution in a dark, cool location, such as a kitchen cupboard or wardrobe
This solution can last up to 2 years if stored properly.
Warning
- Although citric acid is a food product that can be used for pharmaceutical purposes, the solution recipes in this article are only recommended for cleaning agents. Dilute the solution with water (if necessary) to use as a cleaning agent as needed, according to the recipe you follow. Do not ingest citric acid powder or solution, unless recommended by your doctor. Keep citric acid out of the reach of pets and children.
- If not cared for and stored properly, mold can grow in the citric acid solution. Always use clean non-metallic utensils to handle them. Store the solution in a container or bottle that can be tightly closed to prevent mold from growing.
- Do not place the citric acid solution in the sun or in extreme temperatures as it can reduce the acid content in the solution.
