Comparing E210 - Benzoic acid vs E470AIII - Calcium salts of fatty acids
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Popular questions
Is benzoic acid soluble in water?
Only sparingly—about 3 g per liter at room temperature; its solubility increases in hot water and it dissolves readily in many organic solvents.
Is benzoic acid polar?
It has a polar carboxyl group but a nonpolar aromatic ring, so overall it’s only weakly polar; its benzoate salt is much more polar and water‑soluble.
Is benzoic acid a strong acid?
No—it's a weak acid, with a pKa of about 4.2.
What is the melting point of benzoic acid?
About 122–123 °C (251–253 °F).
Is benzoic acid bad for you?
At approved food levels it’s considered safe, with an ADI of 0–5 mg/kg body weight/day; some people may experience irritation or hypersensitivity, and benzene formation in certain acidic drinks is monitored and kept very low.
Calcium salts of fatty acids why insoluble in water?
Their long hydrocarbon chains are strongly hydrophobic, and Ca2+ forms tightly bound, poorly hydrated ion pairs with the carboxylates, leading to crystalline aggregates that water cannot solvate (unlike the more soluble sodium/potassium soaps).
Calcium salts of fatty acids why insoluble in water divalent?
Because Ca2+ is divalent, it can coordinate two carboxylate groups, effectively cross-linking fatty acid anions into poorly hydrated networks that resist dissolution; monovalent cations (Na+, K+) don’t cross-link this way, so their soaps are more water‑soluble.