No.

Index

Grade

Top grade

Qualified product

1

Appearance

Colorless and transparent

2

Difluoroethane, %, ≥

99.9

99.9

3

Fluoroethylene PPm, ≤

10

10

4

Acetylene, PPm, ≤

10

10

5

CFC-12              PPm，       ≤

100

  100

6

Moisture, PPm, ≤

10

20

7

Acidity (calculated by HCL), PPm, ≤

0.1

1.0

8

Residue on Evaporation，        PPm，       ≤

10

100

9

Non-condensable gas, %, ≤

0.8

1.5

10

Chloride (CI - ) Test

qualified

——