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CRITERIA

VALUE

1.

Permanganate index, unit, max

4

2.

Color rate of Caprolactam/water solution, with mass content 50%, Hazen, max

3.0

3.

Content of volatile bases, mmol/kg, max

0.4

4.

Crystallization temperature,°C, min

68.8

5.

Mass content of iron,%, max

0.00002

6.

Cyclohexanoxim mass content, %, max

0.002

7.

Optical density of Caprolactam solution, with mass storage 50%, max

0.04

8.

pH 20% water solution

6.7-7.3

9.

Acidity, mg-equiv./kg, max

0.05

10.

Alkalinity, mg-equiv./kg, max

0.1