| ≥1 piece |
|
Item
|
Value
|
|
Appearance
|
White powder
|
|
Na 2 H 2 P 2 O 7 %
|
≥ 95.0
|
|
pH value
|
4.0 ± 0.5
|
|
Water insoluble %
|
≤ 1.0
|
|
Heavy metal ( base on Pb ) %
|
≤ 0.001
|
|
Arsenic ( base on As ) %
|
≤ 0.0003
|
|
Fluoride ( base on F ) %
|
≤ 0.005
|