Sodium Pyrosulfite CAS 7681-57-4

CAS:7681-57-4
MF:Na2S2O5
MW:190.11
EINECS:231-673-0
Other Names:sodium pyrosulfite

CAS: 7681-57-4

MF: Na2S2O5

What is of Sodium Pyrosulfite with cas 7681-57-4?

Sodium metabisulfite (chemical formula: Na2S2O5) appears as a white crystalline or powder solid with a slight sulfur odor. It is toxic upon inhalation and can strongly irritate skin and tissue. It can be decomposed to release toxic oxide fumes of sulfur and sodium upon high temperature. It can be mixed with water to form a corrosive acid. It is generally used as disinfectant, antioxidant, and preservative agent as well as a laboratory reagent. As a kind of food additive, it can be used as a preservative and antioxidant in food. It can also be applied to the wine and beer making.

Specification

ITEM	TEST RESULT
Sodium Metabisulphite (Na2S2O5) %	97.21
SO2 % ≥	65
Fe % ≤	0.002
Clarity	clear
Insoluble matter in nitric acid% ≤	0.009
AS%	<0.00009
Phosphoric acid test ≤	4.2
Appearance	White to slightly yellowish crystialline powder

Usage

Sodium Metabisulfite is a preservative and antioxidant that exists as crystals or powder having a sulfur dioxide odor. it is readily solu- ble in water. it is used in dried fruits to preserve flavor, color, and to inhibit undesirable microorganism growth.