3.2.1.94	50	-	stable below 50	
3.2.1.94	50	-	stable at pH 5	
3.2.1.94	60	-	60% activity at pH 5 after 30 min	
3.2.1.94	70	-	20% activity after 10 min	
3.2.1.94	80	-	complete inactivation after 10 min