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Ascorbic acid - (also see Ascorbic acid and SO₂)

• Ascorbic acid is a anti oxidising agent.
  
  
• Ascorbic acid, commonly in the form of sodium erothorbate, will react rapidly enough with oxygen (O₂) to act as a oxygen scavenger, during wine processing.
  
  However, ascorbic acid should only be used if adequate levels of free sulphur dioxide (FSO₂) can be guaranteed.