Sodium Metabisulphite

Technical Grade

Product Data & Typical Properties

Formula

Na₂S₂O₅

Molecular Weight

190.11

pH (5% Solution)

4.30 – 4.50

Bulk Density

1,378 kg/m3

Appearance: Free-flowing white to slightly yellow fine granules, characteristic sulfur dioxide odor, soluble in water

Primary Uses

Oxygen scavenger & chlorine remover

Preservative and leavening agent

Pharmaceutical excipient

Component in photographic baths

Reducing & sulfonating agent

Specifications

Sodium Metabisulfite (Na₂S₂O₅)

98.0 – 100.0%

Iron (Fe)

6-8 ppm

Sodium Sulfite (Na₂SO₃)

0 – 1.0%

NSF Certified

Packaging Options

25 kg / 50 kg / 50 lbs sealed polyethylene bags

500 kg polypropylene sacks

1000 kg / 1250 kg polypropylene sacks

Customized packaging available upon request

Storage & Shelf Life

Shelf Life

36 months in original packaging

Storage

Store in a cool, dry, and well-ventilated indoor facility

Supporting Documents (available on request)

Product Documentation
Safety Data Sheets (SDS)
Detailed Specifications

Food & Photo Grades

Product Data & Typical Properties

Formula

Na₂S₂O₅

Molecular Weight

190.11

pH (5% Solution)

4.3 – 4.5

Bulk Density

1,378 kg/m3

Appearance: Free-flowing white to slightly yellow fine granules, characteristic sulfur dioxide odor, soluble in water

Primary Uses

Oxygen scavenger & chlorine remover

Preservative, additive, and leavening agent

Excipient

Photographic solutions

Reducing & sulfonating agent

Seafood processing

Specifications

Sodium Metabisulfite (Na₂S₂O₅)

98.6 – 99.8%

Chloride (Cl)

0 – 0.02%

Heavy Metals (as Pb)

0 – 10 ppm

Iron (Fe)

0 – 5 ppm

Lead (Pb)

0 – 0.5 ppm

Arsenic (As)

0 – 1 ppm

Selenium (Se)

0 – 5 ppm

Sodium Sulfite (Na₂SO₃)

0 – 0.6%

Sodium Thiosulfate (Na₂S₂O₃)

0 – 0.04%

Sulfur Dioxide (SO₂)

66.4 – 67.2%