... grade, food grade usd for liqufication 2.Activity:>80,000u/ml 3.PH:5.5--7.0 ... Heat Stable Alpha Amylase Enzyme(activity:>80,000u/ml )Heat-stable Alpha Amylase is ... Appearance: liquid2) pH: 5.5-7.0, 3) Enzymatic activity: ≥80,000u/ml4) Storage: Should be stored in a ... ) Shelf life: 6 months at 25oC, activity remain ≥90%; 12 months, activity remains ≥80%. Increase dosage after shelf life ...