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Filo Chemical

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16 Prescott Street

Wellesley Hills, MA

02481

 

Phone: 781.237.9200

Fax: 781.237.9205

 

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filo@filochemical.com

 

 

Filo Chemical

Sodium Metabisulfite

Na2S2O5

 

 

Quality Specifications


Purity
SO2
Na2S2O3
As
Fe
Pb
Se
Zn
Cu
Amm. AqNO3

  Grade F/P
98% min
66.0% min
300 ppm max
    1 ppm max
    5 ppm max
    5 ppm max
    5 ppm max
  10 ppm max
  10 ppm max
Passes test

Solution:  200g dissolved in 1 litre of distilled water shows not more than a sight opalescence for grade F/P.

Grade F/P conforms to the requirements of the Food Chemical Codex.  Grade P complies with BSS 3834 and ISO 3267 for Sodium Metabisulfite, Photographic Grade.

Physical Properties

Appearance


Molecular Weight
Decomposition
Density
pH
Solubility in Water

Crystalline, white/off-white powder; pungent sulfur dioxide odor especially when dissolved in water.
190.1
Decomposes on heating
1.48
4.5 (5%)
40% w/w

Packaging

  • 55.12# (25 kg) polyethylene lined multi-ply paper sacks
  • 2204.60# (1000 kg) polethylene lined bulk bags

Safety Data

  • CAS No.  7681-57-4

  • UN No.