Sodium Metabisulfite
Molecular Formula: Na2S2O5
CAS#:7681-57-4
HS Code:28321000
Appearance: White powder
Qualities are conformed: GB1893-2000
ITEMS UNIT SPECIFICATION
Purity (%) min 97
As (ppm) max 2
Fe (ppm) max 30
Pb (ppm) max 5
Cd (ppm) max 5
PH 4-5
Water insolubles (%) max 0.03
Usage
it is for printing and dyeing industry, organic synthesis, printing, leather, pharmaceutical and other sectors; in food processing as preservatives, bleaching agents, baking powder. And used in industrial mineral processing.
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