Sodium Metabisulfite (SMBS)

Brand Name: REAPCHEM

Pro Name:Sodium Metabisulfite

Other Name:SMBS

Place of Origin:Shandong, China

Molecular Formula:Na₂S₂O₅

Molecular weight:190.09

CAS No:7681-57-4

Appearance:White powder crystal

Solubility:100%

Grade:TECH Grade / FOOD Grade/High purity Grade

2. Packaging & Delivery

Packaging detail:PP woven bag with PE inner bag in 25kg/50kg/1000kg or according to customer\'s demand.

Loaded:25mt/20\'FCL with pallets, 25mt/20\'FCL without pallets

Delivery detail:Within 7-10 days

Transportation:BY SEA

Port:QINGDAO or TIANJIN

3. Specifications

Analysis Item	Specification
TECH Grade	FOOD Grade	High Purity Grade
Assay	96.5% min	97.0% min	98.0% min
Iron (as Fe)	0.005% max	0.003% max	0.001% max
Appearance of solution	-	Colorless and transparent	-
Arsenic (as As)	0.0001% max	0.0001% max	0.0001% max
Heavy Metals (as Lead)	-	0.0005% max	0.0005% max
pH	4.0-4.6	4.0-4.6	4.0-4.6
Water Insoluble	0.05% max	0.05% max	0.05% max

4. Application

Sodium metabisulfite is mainly used as preservative in food applications, as an enzyme inhibitor in waste water treatment and leather tanning process. For bleaching wool and jute in textile industries. As antichlor after cotton bleaching printing and dying industry, to destroy cyanides in gold mining industry. Preservative in photo developer solutions, as reducing agent and sulfonating agent for chemical and medical industries etc.