|
 Products
Sodium metabisulfite
Synonyms:
Sodium metabisulphite; Sodium metabisulfite; Sodium disulfite; Sodium
disulphite; Sodium pyrosulfite;
Sodium pyrosulphite
Molecular formula: Na2S2O5
Molecular weight: 190.10
CAS No.: 7681-57-4
EINECS No.: 231-673-0
H.S.Code:
28321000
Properties:
White or yellow crystalline powder or crystal with strong
sulphur dioxide smell, specific gravity: 1.4, soluble in water,
glycerine and little in ethanol , aqueous solution is acidic
fluid.
TECH
GRADE / FOOD
GRADE
|
Item
|
Specifications |
| Tech
Grade |
Food
grade |
FCCⅤ |
Purity
[
Na2S2O5
]
% ≥ |
96.0 |
97.0 |
90.0 - 100.5 |
Sulphur dioxide
[ SO2
]
% ≥ |
65.0 |
65.3 |
|
|
Clarity |
confirm |
confirm |
|
|
Iron content [ Fe
]
% ≤ |
0.005 |
0.003 |
0.001 |
|
Heavy metal [ as per Pb
]
% ≤ |
0.001 |
0.001 |
|
|
Arsenic [
As ]
% ≤ |
0.0002 |
0.0002 |
|
Water insoluble matter,
%
≤ |
0.02 |
0.02 |
|
|
PH |
4.0 - 4.6 |
4.0 - 4.6 |
|
| Lead(Pb)
mg/kg
≤ |
|
|
2 |
Selenium(Se)
mg/kg
≤ |
|
|
5 |
Application:
Mainly used in pharmaceutic materials, paper industry,
photochem, bleaching, developer, leather chroming agent, rubber
industry, dyes, printing dyeing, textile auxiliary, cotton wool,
antichlor, chromate waste water treatment agent, anticorrosive,
disinfecting etc..
.Packing:
In
plastic woven bags / kraft paper bags / LDPE bags of 25 kgs net and PE
bags lining, or in 1,000 / 1,100 kgs big bags. or
in 1 kg Aluminium foil bags / 2.5 kgs bottles.
Transportation & storage:
It can not be exposured in open air or under
the sunlight, must
be stored under ventilating, drying, never mix stored with gasoline,
acids, oxidants and other inflammable substances etc.
|
