International Code of Oenological Practices

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Treatment using chitin-glucan

II.3.4.17 Treatment using chitin-glucan



  • Chitin-Glucan: processing aid


Addition of chitin-glucan of fungal origin to wines


a)        To reduce heavy metal content, notably iron, lead, cadmium, copper,

b)       To prevent iron haze, copper haze,

c)        To reduce possible contaminants, especially ochratoxin A.


a)        The doses to be used are determined after preliminary testing. The maximum dose used must not exceed:

  • 100 g/hl for the objectives a) and b)
  • 500 g/hl for the objective c)

b)       Sediments are eliminated by physical procedures.

c)        Chitin-glucan complex of fungal origin may be used alone or together with other admitted products.

d)       Chitin-glucan complex must comply with the requirements of the International Oenological Codex.

Recommendation of the OIV: