Sodium hydrosulfite
Molecular formula: Na2S2O4
Executive standard:
Industrial grade: HG/T 2074-2011
Food grade: GB 22215-2008 HG/T 2074-2011
Packing:
1)iron drum in seal with inner double layer plastic film and net weight is 20kg,40kg
2)domestic recoverable package and net weight is 1200kg;
Notes: it should be stored in cool, dry and ventilated warehouse; please keep away from fire, heat and direct sunlight.
Uses: textile reducing agent, printing assistant, decolorizer andcleaning agent; mechanical pulp in paper making industry; food food preservative and so on
HG/T 2074-2011 product technical index:
|
Item |
index |
||
|
superior grade |
top grade |
qualified product |
|
|
sodium hydrosulfite(Na2S2O4 ),% ≥ |
90.0 |
88.0 |
85.0 |
|
Appearance |
white crystal powder |
||
|
smell |
no smell or light sulfur dioxide smell |
||
|
solubility |
soluble in neutral formaldehyde solution |
||
GB 22215-2008 product technical index :
|
Item |
index |
|
sodium hydrosulfite(Na2S2O4 ),% ≥ |
88.0 |
|
charity |
pass testing |
|
heavy metal(Pb) ,% ≤ |
0.0010 |
|
lead(Pb) ,%,≤ |
0.0005 |
|
cadmium(Cd),%,≤ |
0.0002 |
|
arsenic(As) ,%,≤ |
0.0001 |
|
Ethylene Diamine Tetraacetic Acid(EDTA) |
qualified |
|
formate(HCOONa), % ≤ |
0.050 |