| ≥1 piece |
|
Sense index
|
|||
|
Items |
index |
||
|
Vc grade
|
Food grade
|
Daily chemical industry grade
|
|
|
Appearance |
Colourless or yellowish , clear and transparent liquid |
||
|
Chemical and Physical index
|
||||
|
Items
|
Unit
|
index |
||
|
Vc grade
|
Food grade
|
Daily chemical industry grade
|
||
|
Content ( dry basis ) |
% |
98.5
|
70 |
80-92 |
|
Solid substance |
% |
80-92
|
70 |
70 |
|
DE ( dry basis ) |
% |
0.15
|
0.2 |
0.2 |
|
PH |
|
5.0-7.0
|
5.0-7.0 |
5.0-7.0 |
|
Hygiene index
|
|||
|
Items
|
Vc grade
|
Food grade
|
Daily chemical industry grade
|
|
Heavy metal
|
5mg/kg
|
5mg/kg
|
5mg/kg
|
|
Nickle
|
1mg/kg
|
1mg/kg
|
1mg/kg
|
|
Pb(Pb2+)
|
0.5mg/kg
|
0.5mg/kg
|
0.5mg/kg
|
|
As(As3-)
|
0.5mg/kg
|
0.5mg/kg
|
0.5mg/kg
|
|
Sulphate ash
|
0.1%
|
0.1%
|
0.1%
|
|
Chlorid
|
10mg/kg
|
20mg/kg
|
20mg/kg
|
|
Sulphate
|
30mg/kg
|
30mg/kg
|
30mg/kg
|