Product Name: Sodium Metabisulfite
Category: Inorganic chemical/inorganic salt
CAS NO: 7681-57-4
EC NO: 231-673-0
Molecular Formula: Na2S2O5
Molecular Weight: 190.1
Properties: white or yellowish crystalline powder with strong SO2 odor; specific wt.: 1.4. soluble in water, its aqueous solution is acidic.
Specifications:
Item
food grade
Industrial grade
Purity (Na2S2O5)
≥98.0%
≥97.0%
Sulfur dioxide( SO2)
≥65.0%
≥65.0%
Arsenic ( As )
≤0.0002%
-
Heavy metal (Pb)
≤0.0005%
-
Selenium (Se )
≤0.0005%
-
Iron (Fe)
≤0.001%
≤0.002%
Insol. in water
≤0.02%
≤0.05%
pH-value
4.0-4.8
4.0-4.8
Note: Meet FCC V and E 223 standard
Packing: In PP woven bag lined with PE film bag, lining thickness≥0.05mm,25, 50, 1000kg/bag
Usage: As mordant for printing & dyeing; as dechlorinating agent for textile bleaching; as reducing agent and sulfonating agent for chemical and medical industries etc.
