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Effective performance criteria for preservatives according to FP XII.
| Microorganisms | Criteria | Log Reduction | ||||
|---|---|---|---|---|---|---|
| 6 h | 24 h | 7 Days | 14 Days | 28 Days | ||
| Bacteria | A | 2 | 3 | - | - | BW |
| B | - | 1 | 3 | - | BN | |
| Fungi | A | - | - | 2 | - | BN |
| B | - | - | - | 1 | BN | |
BW—no growth of viable microorganisms, BN—no increase in the number of microorganisms.
