Sodium Metabisulfite

Chemical Formula: Na2S2O5

CAS No. :7681-57-4

Quality Specifications

  • Grade F/P

  • Purity

    98% min

  • SO2

    66.0% min

  • Na2S2O3

    300 ppm max

  • As

    1 ppm max

  • Fe

    5 ppm max

  • Pb

    5 ppm max

  • Se

    5 ppm max

  • Zn

    10 ppm max

  • Cu

    10 ppm max

  • Amm. AqNO3

    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

    Crystalline, white/off-white powder; pungent sulfur dioxide odor especially when dissolved in water.

  • Molecular Weight

    190.1

  • Decomposition

    Decomposes on heating

  • Density

    1.48

  • pH

    4.5 (5%)

  • Solubility in Water

    40% w/w

Packaging

  • 55.12# (25 kg) polyethylene lined multi-ply paper sacks

  • 2204.60# (1000 kg) polethylene lined bulk bags

The information provided in this document is believed to be accurate and was obtained from sources believed to be reliable. However, the information is provided without any representation or warranty, expressed or implied, with respect to its accuracy or completeness. It is the users’ responsibility to determine the suitability of this product and relevance of this information for its use. Filo Chemical does not assume liability resulting from the use, handling, storage, and disposal of this product.