TABLE 15.

Kinetic approach: D-values at 20°C of phenol and benzalkonium chloride against fungi and bacteria^a

Antimicrobial agent	pH	Concn (%, wt/vol)	D-value (h)b against:
			Aspergillus niger	Candida albicans	Escherichia coli	Pseudomonas aeruginosa	Staphylococcus aureus
Phenol	5.1	0.5	20	13.5	0.94	—c	0.66
	6.1	0.5	32.4	18.9	1.72	0.17	1.9
Benzalkonium chloride	5.1	0.001	—d	9.66	0.06	3.01	3.12
	6.1	0.002	—d	5.5	—c	0.05	0.67

^aAbstracted from the data in references 244 and 245. 

^bD-values are the times to reduce the viable population by 1 log unit. 

^cInactivation was so rapid that the D-values could not be measured. 

^dNo inactivation: fungistatic effect only.