Very fresh eggs can sometimes have cloudy egg whites due to
carbon dioxide in the white. Also, sometimes the protein that holds
the yolk together can be stronger and becomes visible in the whites,
causing a cloudy appearance. Whites can also become cloudy if they
were pasteurized, which is unlikely since we hand wash the eggs.
They can also become cloudy if they were stored at temperatures
between 32 and 39 degrees F. As a result, egg producers do not
concern themselves with cloudy whites.
In fresh eggs, the yolk stands up tall, as does the white next to the
yolk.
A spoiled egg can float in water, and the white can have a pinkish or
greenish-blue cast. (Although, sometimes a slight yellowish or
greenish hue can just be from the riboflavin B vitamin content in a
fresh egg.) Do not use eggs that have cracked shells.
There are some links within the quoted part of the article that take you to an edu site with additional information.
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