Betacyanin was stable in acidic conditions (pH 3 ÷ 6), especially in pH 4, but this stability rapidly decreased in neutral and alkaline pH (pH ≥7).
Betacyanin ổn định trong nước ép pH axit (pH 3 ÷ 6), đặc biệt là pH 4, giảm nhanh trong nước ép có pH trung tính (pH 7) và pH kiềm (pH 8).