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Details for China Sodium metabisulfite

Sodium metabisulfite 7681-57-4

Category :

Inorganic chemicals

Sodium metabisulfite
CAS NO : 7681-57-4
EC NO : 231-673-0
MF : Na2S2O5
MW : 190.1065
Product description :

Product Name:

Sodium metabisulfite

Category:

Inorganic chemical/inorganic salt

CAS NO:

7681-57-4

EC NO:

231-673-0

Molecular Formula:

Na2S2O5

Specifications

Item

Quality spec.

food grade

technical grade

Purity (Na2S2O5)

≥98.0%

≥970%

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

Molecular Weight:

190.1

Packing:

In PP woven bag lined with PE film bag, lining thickness≥0.05mm,25, 50, 1000kg/bag

Specifications:

Properties: white or yellowish crystalline powder with strong SO2 odor; specific wt.: 1.4. soluble in water, its aqueous solution is acidic.
Molecular Formula: Na2S2O5
Molecular Weight: 190.10
CAS NO.: 7681-57-4

Use:

As mordant for printing & dyeing; as dechlorinating agent for textile bleaching; as reducing agent and sulfonating agent for chemical and medical industries etc.

Synonyms : Sodium pyrosulfite;disodium disulphite;Sodium metabisulphite;Sodium disulphite;Sodium pyrosulphite;SODIUM DISULFITE;disodium oxidosulfanesulfonate oxide;Sodium Metabi;Metabisulfite Sodium;
Molecular Structure : Sodium metabisulfite 7681-57-4