5 Facts On Ph Of Egg : Types, Factors And Reasons

What is the pH of an Egg?

The pH of a fresh egg ranges between 7.6 to 8.0, which is slightly basic. As an egg age, its pH increases, becoming more alkaline due to the loss of carbon dioxide through its porous shell. A pH level of 9.2 or higher indicates spoilage or contamination.

What is the pH of different types of Eggs?

The pH of different types of eggs is mentioned below.

Type of EggpH Value
Chicken eggs7.6 to 8.0
Duck eggs7.5 to 8.5
Quail eggs7.0 to 8.0

Why is the pH of different types of Eggs different?

The pH of different types of eggs can vary due to differences in the composition of the eggshell and the egg white (albumen). For example, duck and quail eggs have thicker shells than chicken eggs, which may affect the rate at which carbon dioxide diffuses out of the egg and therefore affect the pH. 

Additionally, the egg white of duck and quail eggs may have different protein compositions than that of chicken eggs, which could also influence the pH. 

Other factors such as diet, environment, and bird genetics may also contribute to differences in egg pH.

Effects of pH of the Egg

The pH of an egg can have various effects on the egg itself and on any food products that contain the egg. Here are a few examples:

  1. Egg freshness: As mentioned earlier, the pH of an egg increases as it ages. This increase in pH can lead to a decrease in egg freshness, as the egg white becomes thinner and more watery.
  2. Cooking properties: The pH of an egg can affect its cooking properties, such as how well it coagulates or sets when cooked. Eggs with a lower pH tend to coagulate more easily and produce firmer textures when cooked.
  3. Food safety: A high pH in eggs can create an environment conducive to the growth of harmful bacteria such as Salmonella. Therefore, it’s important to handle and store eggs properly to prevent contamination.
  4. Baked goods: The pH of eggs can also affect the quality of baked goods such as cakes and bread. For example, a lower pH can help create a finer crumb and increase the product’s shelf life.

Therefore, the pH of an egg is an important factor to consider when cooking with eggs or using them in food products.

Factors affecting the pH of an Egg

Several factors can affect the pH of an egg, including

  1. Age of the egg: As an egg age, the carbon dioxide inside the egg escapes through the shell, which causes the pH to increase.
  2. Diet of the bird: The diet of the bird can affect the pH of the egg. For example, a diet high in alkaline minerals such as calcium can lead to eggs with a higher pH.
  3. Storage conditions: Storing eggs at higher temperatures or in a humid environment can accelerate the loss of carbon dioxide, leading to an increase in pH.
  4. Genetics of the bird: The genetics of the bird can also influence the pH of the egg. For example, some breeds of chickens are known to produce eggs with higher pH levels than others.
  5. Incubation conditions: If an egg is fertilized and incubated, the pH of the developing embryo inside the egg can affect the pH of the egg.

Frequently Asked Questions

Ques 1. What is the pH of an egg?

Ans 1. The pH of an egg can vary depending on the age of the egg. Generally, a fresh egg has a pH between 7.6 and 8.0, which is slightly alkaline.

Ques 2. Why does the pH of an egg matter?

Ans 2. The pH of an egg can affect its quality and safety, as eggs with a higher pH are more likely to have a looser, watery white and can be more hospitable to the growth of bacteria.

Ques 3. Why does the pH of an egg change over time?

Ans 3. The breakdown of proteins in the egg and the release of carbon dioxide can cause the pH to change over time.

Ques 4. How does the pH of an egg affect its quality?

Ans 4. Eggs with a higher pH can have a looser, watery white and weaker yolk membrane, which can impact their quality.

Ques 5. How does the pH of an egg affect its safety?

Ans 5. A higher pH in an egg can create a more hospitable environment for bacteria to grow, which can pose a safety risk.

About the author

I am Leena Raswant, a chemistry postgraduate. I thrive on challenges and continually specified goals. I aim to learn, unlearn, relearn and spread my knowledge in the best possible ways.

Leave a Comment