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SO2 65% Sodium Metabisulfite Food Additive Na2S2O5 97% Purity EC No 231-673-0

Categories Sodium Pyrosulfite
Brand Name: OEM
Model Number: sodium pyrosulfite-f7
Certification: SGS,ISO 9001
Place of Origin: Hunan
MOQ: 1 metric ton
Price: usd 300 per metric ton
Payment Terms: T/T , L/C
Supply Ability: 3000 tons per month
Delivery Time: 5-8 days
Packaging Details: 25 kgs bag,1000 kgs big bag
name: sodium pyrosulfite smbs preservative
other name: sodium metabisulfite preservative
situation: dry powder
usage: seafood antioxidant
packing: 1250/1000 kgs jumbo bag
mocular: Na2S2O5
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SO2 65% Sodium Metabisulfite Food Additive Na2S2O5 97% Purity EC No 231-673-0

Product Name: Food Grade Sodium Metabisulfite/sodium pyrosulfite SO2 65%

Application: Used as a food preservative. It is a slight hazy solution free from inappropriate impurities. These sulphites are available in white and faint cream crystalline free flowing powder and are widely used in photographic chemical and preservative chemical.Used in medicine when producing chloroform,solasulfone and methnylal;used as coagulant in rubber industry; used as dechlorided agent or assistants in printing and dyeing industry; used to improve leather properties in leather industry; used as developing agent in photosensitivity industry; used when producing hydroxyl geranial, hydrochloric hydroxylamine in chemical industry; used as bleaching agent, antiseptics, antioxidant, ect.in food industry.

Sodium metabisulphite white or yellow crystalline powder or small crystallization, with strong smell, a proportion of SO2 1.4, soluble in water, become acidic aqueous solution, and acid contact is released SO2 generated corresponding salts, long for air, is oxidized to Na2S2O6, reason this product not far. Above 1500C, namely the SO2 decomposition.


molecular formula: Na2S2O5
Appearance: white crystal powder

ItemStandardTest ResultsConclusion
Heavy metal(Pb mg/kg)≤5.0<5qualified


Industrial used for printing and dyeing, organic synthesis, printing, the leather making, pharmaceutical and other department. In food processing of bleaching agent and antiseptic, osteoporosis agent.

Packing Details:

Sodium Metabisulfite (SMBS ) will be packed in N.W25kg plastic woven bag within PE liner or Kraft paper bag within PE liner,or 500kg/1000kg/1100kg/1200kg jumbo bag.

20MT-25MT will be loaded in 1*20’fcl container.


Sodium Metabisulfite (SMBS ) should be stored in cool and dry place, avoid moisture and heat. No breakage, No mixed with oxidant and toxic matter. The storage period is 6 month since the production date. It should be transported by clean car, with covering matter, avoid raining.


Name: Sodium Metabisulphite

Appearance: white

Grade: Food Grade/Industry Grade

Type: Emulsifiers, Enzyme Preparations, Flavoring

Molecular formula: Na2S2O5

CAS No. : 7681-57-4

EINECS : 231-673-0

HS Code: 28311020

Certificate: SGS/Health certificate/ISO certificate


Industry Grade

1.Mordant:printing and dyeing industry

2.Bleaching Agent: waste water/textile/paper pulp/bamboo/timber

3.Rubber solidifying agent

4.Hydrocarbon perfume aldehyde: perfume industry

Food Grade

1.Bleaching agent (e.g. candies, cake, bamboo shoots)

2.Loosening agent (e.g. bread, cracker)

3.Antiseptic and germicide (e.g. fruit juice, tinned food brews, the cereals food)

4.Inhibitor and freshen agent (e.g. day lily, seafood, fruitand vegetable)

Sodium Metabisulfite

Food agrade:In food additive, as Bleach, Leavening agent as well as Antioxidant Preservative.

Industry garde: Used indyeing, organic synthesis, printing, leather, pharmaceutical industry.

CONTENT (AS Na2S2O5)97% MIN97.35%
IRON (Fe)0.003%MAX0.0018%
HEAVY METALS(As Pb)0.0005%MAX0.0005%
PH VALUE4.0-4.64.48
Conclusion: The product complies with the standard above.

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