Antioxidant 7681-57-4 Sulphurous Sodium Metabisulfite Powder

Basic Information
Place of Origin: Hunan, China
Brand Name: Sodium Metabisulfite
Model Number: Na2S2O5
Minimum Order Quantity: 25 Ton/20'
Price: Negotiable
Packaging Details: in the woven bag lined with plastic, net wt. 25kgs or 1000kgs bags.
Delivery Time: 20 Days
Payment Terms: L/C; D/P; T/T
Supply Ability: 20000 Ton/per year
Detail Information
Molecular Weight: 190.1065 Form: White Powder
Purity: 96.5% Min Smell: Sulphorous
Application: Water Purifier, Gas Purification Agent,mordant,herbicide; Pesticides. PH-Value: (50 G/l) At 20 °C: 3.5-5.0
Formula: Na2S2O5 Sensitivity: Air & Moisture Sensitive
Density: 1.48 Merck : 14,8638
CAS: 7681-57-4 HS Code: 2832.2000.00
Color: White To Slightly Yellow
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Antioxidant 7681-57-4


Sulphurous Sodium Metabisulfite


7681-57-4 Sodium Metabisulfite

Product Description

96.5% Industrial Grade Min Sodium Metabisulfite Hs Code: 2832.2000.00 Powder Used For Water Purifier




Formula Na2S2O5
Molecular Weight 190.1065
CAS 7681-57-4
HS Code 2832.1000.00
Appearance White or Light Brown Powder
Smell Sulphorous
pH-value (50 g/l) at 20 °C 3,5-5,0 Change in condition
Melting range >300 °C
Solubility in / Miscibility with Water at 20 °C 650 g/l
Sensitivity Air & Moisture Sensitive
Density 1.48
Merck 14,8638
Purity 96.5% Min
Color White to slightly yellow



1. Sodium pyrosulfite is used in the production of safety powder, sulfamethazine anil, caprolactam, as well as chloroform, phenylpropylsulfone and benzaldehyde purification.

2. Sodium metabisulfite is used as a fixative in the photographic industry.

3. Sodium metabisulfite is used in the spice industry to produce vanillin. Used as a brewing industrial preservative, rubber coagulant and cotton bleached after dechlorination agent.




Item Standard Test Result
Na2S2O5 96.5% MIN 96.57%
SO2 65.4% MIN 65.44%
Fe 0.004% MAX 0.0024%
Pb 0.0018% MAX 0.0009%
Insoluble 0.0002% MAX 0.0002%





Antioxidant 7681-57-4 Sulphurous Sodium Metabisulfite Powder 0Antioxidant 7681-57-4 Sulphurous Sodium Metabisulfite Powder 1

Contact Details

Phone Number : 86-13027429383