Sodium citrate
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Sodium citrate is a widely used ingredient in cosmetics, personal care, and skincare formulations. Depending on its function, it may serve as a moisturizer, preservative, emulsifier, or active ingredient to enhance the overall effectiveness and performance of a product.
Sodium citrate (Wikipedia)
Sodium citrate may refer to any of the sodium salts of citric acid (though most commonly the third):
The three forms of salt are collectively known by the E number E331.