Item

Top grade

First grade

Qualified product

Appearance, Odor

Colorless and clear, no suspended matter, no mechanical impurities

Purity, %, ≥

99.90

99.50

99.20

Tetrachloromethane, %, ≤

0.04

0.08

0.20

Moisture, %, ≤

0.010

0.020

0.030

Acidity (calculated as HCl),% ≤

0.0004

0.0006

0.0010

Chromaticity (Pt-Co), ≤

10

15

25