Sodium Metabisulfite

Sodium Metabisulfite

Sodium Metabisulfite (sodium bisulfite anhydrous, sodium pyrosulfite) is a white inorganic crystalline compound with the chemical formula Na2S2O5.



  • - Dechlorination in municipal wastewater, pulp & paper, power, and textile water treatment plants
  • - Disinfectant
  • - Water treatment in leather tanning process
  • - Preservative in food applications
  • - Oxygen scavenger
  • - Cherry brining process
  • - Gold mining industry
  • - Preservative in photo developer solutions
  • - Antioxidant
  • - Used in production of cleaning agents, detergents, and soaps


Chemical Composition

Sodium Metabisulfite, wt% 98.7% min.
Assay as SO2 66.5 min.
Insolubles, wt% ≤ 0.005
Chloride, wt% ≤ 0.05
Thiosulfate, wt% ≤ 0.05
Arsenic, ppm ≤ 1.0
Heavy metals, ppm ≤ 10.0
Iron as (Fe), ppm ≤ 2.0
Selenium, ppm ≤ 5.0
Lead as (Pb), ppm ≤ 2.0

Product meets FCC, ACS, and/or USP standards. Also Kosher and NSF certified.


50lb bags/42 bag pallets 2,000lb super sack Other weights available upon request

Our Other Products

Sodium Sulfite 15% Solution
Find our full product offering for Sodium Sulfite 15% Solution production.
Sodium Thiosulfate 30% Solution
Find our full product offering for Sodium Thiosulfate 30% Solution production.
Sulfur Dioxide (SO2)
Find our full product offering for Sulphur Dioxide (SO2) production.
Sodium Bisulfite 40% Solution
Find our full product offering for Sodium Bisulfite 40% Solution production.