21. The cycle is completed when silver oxide takes this compound back to ( " )-malic acid . 22. The major acids in wine are tartaric and malic acid with succinic acids playing a small role. 23. The'Foxwhelp'is classed as a " bittersharp " cider apple, containing high levels of tannin and malic acid . 24. "' Malic acid "'is an organic compound with the molecular formula C 4 H 6 O 5. 25. I suspect it may be malic acid that causes this, but I stress this is pure speculation. 26. This is because malic acid has two acid radicals (-COOH ) while lactic acid has only one. 27. The fruits contain 10 percent malic acid and a small proportion of tartaric and hydroxy citric acid. 28. "' Calcium citrate malate "'is a water-soluble calcium salt of citric acid and malic acid with variable composition. 29. As suggested by its name, it contains an SH group instead of an OH group on malic acid . 30. Malic acid is the source of extreme tartness in United States-produced confectionery, the so-called " extreme candy ".
