Degree

CYTOTOXICITY

DESCRIPTION OF THE OF CYTOTOXICITY AREA

0

Absent

Absence of decolorization around or under the sample

1

Slight

Decolorization limited to the area under the sample

2

Mild

The size of the decolorized area from the sample is less than 0.45 cm

3

Moderate

The size of the decolorized area from the sample is between 0.45 cm and 1.0 cm

4

Severe

The size of the decolorized area from the sample is greater than 1.0 cm, but does not involve the entire plate