English 
English  |
| Quantity: | |
|---|---|
Name of index | GB6782-2009 | BP93/98 | E331 |
Appearance | -- | Colorless or white crystal or crystalline | |
Content(Na3C6H5O7·2H2O),% | 99.0-100.5t | 99.0-101.0 | 99.0-101.0 |
Acidity and Alkalinity | Compliance | Accord with the test | Accord with the test |
Sulphates,≤% | 0.01 | 0.015 | 0.015 |
Heavy metals(As Pb), ≤% | -- | 0.001 | 0.0005 |
Oxalate(As H2C2O4), ≤% | 0.01 | 0.03 | 0.01 |
Easy carbonify substance |
| Accord with the test | Accord with the test |
Chloride, ≤% | 0.005 | 0.005 | 0.005 |
Loss on drying,% | 10.0-13.0 | 11.0-13.0 | 11.0-13.0 |
PH value(5% aqueous solution) | -- | -- | 7.5-9 |
Arsenic(As),≤ppm | 1 | -- | 1 |
Lead(Pb),≤ppm | 2 | -- | 1 |
Mercury(Hg),≤ppm | -- | -- | 1 |
Clarity & colour of solution | -- | – | Accord with the test |
96.0 | |||
5 | |||
0.02 | |||
Experimental film by melting | |||
Name of index | GB6782-2009 | BP93/98 | E331 |
Appearance | -- | Colorless or white crystal or crystalline | |
Content(Na3C6H5O7·2H2O),% | 99.0-100.5t | 99.0-101.0 | 99.0-101.0 |
Acidity and Alkalinity | Compliance | Accord with the test | Accord with the test |
Sulphates,≤% | 0.01 | 0.015 | 0.015 |
Heavy metals(As Pb), ≤% | -- | 0.001 | 0.0005 |
Oxalate(As H2C2O4), ≤% | 0.01 | 0.03 | 0.01 |
Easy carbonify substance |
| Accord with the test | Accord with the test |
Chloride, ≤% | 0.005 | 0.005 | 0.005 |
Loss on drying,% | 10.0-13.0 | 11.0-13.0 | 11.0-13.0 |
PH value(5% aqueous solution) | -- | -- | 7.5-9 |
Arsenic(As),≤ppm | 1 | -- | 1 |
Lead(Pb),≤ppm | 2 | -- | 1 |
Mercury(Hg),≤ppm | -- | -- | 1 |
Clarity & colour of solution | -- | – | Accord with the test |
96.0 | |||
5 | |||
0.02 | |||
Experimental film by melting | |||
