|
Item
|
GB6009-2003 Class I first quality
|
Actual measurement value of regular products
|
Actual measurement value of of neutral products
|
Actual measurement value of low-chlorine products
|
|
sodium sulphate %(Na2SO4)
|
≥ 99.0
|
99.20
|
99.30
|
99.65
|
|
water insolubles %
|
≤ 0.05
|
0.02
|
0.03
|
0.01
|
|
Mg %
|
≤ 0.15
|
0.02
|
0.02
|
0.02
|
|
chlorides %(Cl)
|
≤ 0.35
|
0.19
|
0.20
|
0.04
|
|
iron %(Fe)
|
≤ 0.002
|
0.001
|
0.001
|
0.001
|
|
iron %(Fe)
|
≤ 0.20
|
0.02
|
0.02
|
0.02
|
|
iron %(Fe)
|
≥ 80
|
88
|
85
|
83
|
|
iron %(Fe)
|
not required
|
not required
|
(1% solution)7.5
|
(5% solution)7.2
|
Properties:
White fine crystal or powder, easily soluble in water; absorb moisture; odorless, non-toxic.
Use:
Widely used in vinylon, sodium silicate, bleaching, glass, paper making, tanning, metal smelting, surface treatment and filler industries. Grade: Class I first quality