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Table 1 USP Standards to purified water and water for injection (WFI)

From: Chemical resistance of the gram-negative bacteria to different sanitizers in a water purification system

 

Purified Water

WFI

Conductivity

< 1.3 μS/cm (25°C)

< 1.3 μS/cm (25°C)

Total Organic Concentration

< 0.5 ppm

< 0.5 ppm

Bacteria

100 CFU/mL

10 CFU/mL

Endotoxin

Non specified

< 0.25 EU/mL