CERTIFICATE OF ANALYSIS
|
Commodity
|
Dimethyl Formamide
|
Standard
|
GB/T 3729-2007
|
Batch number
|
3703W7115120
|
Date
|
2015-8-30
|
Items
|
Index
|
Result
|
Superior Grade
|
First Grade
|
Qualified Grade
|
Purity,% ≥
|
99.9
|
99.5
|
99.5
|
99.95
|
Methanol,% ≤
|
0.0010
|
0.0030
|
0.0050
|
0.0001
|
Chromaticity (in Hazen) (Pt-Co),≤
|
5
|
10
|
20
|
5
|
Moisture,% ≤
|
0.050
|
0.050
|
0.050
|
0.03
|
Iron (as Fe)(mg/kg), ≤
|
0.050
|
0.050
|
0.050
|
0.035
|
Acidity(as formic acid),% ≤
|
0.0010
|
0.0020
|
0.0030
|
0.0003
|
Alkalinity (as dimethylamine),% ≤
|
0.0010
|
0.0020
|
0.0030
|
0.0005
|
PH value (25℃, 20% aqueous solution)
|
6.5~8.0
|
6.5~8.0
|
6.5~8.0
|
7
|
Conductivity(25℃)us/cm ≤
|
2
|
-
|
-
|
0.1
|
TEST CONCLUSION
|
Superior Grade
|