No.

Index

Top grade

1

Appearance

Colorless transparent liquid

2

Difluoromethane/(%)≥

99.90

3

Moisture/(ppm)≤

10

4

Acidity (in HCL)/(ppm) ≤

1.0

5

Chloride ion/(ppm) ≤

1.0

6

Residue on Evaporation/(ppm)≤

10.0

7

Non-condensable gas/(%)≤

0.8

8

Organic impurities

F 12  /(%)≤

0.04

F 22  /(%) ≤

0.04

Dichloromethane+chloromethane/(ppm)≤

30

F 21  /(ppm)≤

100

F 31  /(ppm)≤

3

Total organic impurities/(%)＜

0.10