What is Sodium Citrate (E331) in food? Types, Uses and Safety
May 10, 2020 · Properties Appearance. Crystalline white powder or crystals. Solubility. Soluble in water (1g/1.5ml, 25°C), insoluble in ethanol. PKa. Sodium citrate is the base of citric acid, which is a weak organic acid with three carboxylic acid groups and as a result it dissociates three H+, and with three PKa values, PKa1 = 3.14, PKa2 = 4.77 and PKa3 = 6.39.
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