Phytates
Phytates can be used to remove metals, especially iron, from liquid food products such as wines and other beverages. Recognised by the OIV, phytates are permitted for use in grape wine in over 35 countries worldwide.
Calcium phytate is the salt of the inositol hexaphosphoric ester, or inositohexaphosphoric or phytic acid. In its calcium and magnesium double salt forms, phytic acid composes phytin, a reserve form of phosphorous in plants. Since it is an iron (III) complexing agent approved for removal of excess iron in wines, its use must be strictly monitored. Any excess phytate with respect to the iron (III) content causes deposits to build up when the slightest oxidation occurs.
White powder with an acidulous taste, which is minimally soluble in water, soluble in dilute strong acids, and difficult to dissolve in wine, in which solubility is incomplete. Aqueous calcium phytate solution possess an acidic nature, which is disclosed by movement of the indicator to litmus. It yields calcium reactions. For further substance information, please see the International Oenological Codex.
Synonym(s): Phytic Acid
CAS Number: 83-86-3
E Number: 391
INS Number: 391
International Organisations
Codex Alimentarius
-Food Category, Functional Class and Recommended Usage is not available at this time.
International Organisation of Vine and Wine (OIV)
-Food Category Wine (grape) Functional Class Antioxidant Calcium phytate : processing aid Recommended Usage (International Code of Oenological Practices – Annex: Maximum Acceptable Limits) CALCIUM PHYTATE: GMP
FIVS
Classification Category 2 – Naturally occurring in grapes and treatment residual in wine
Recommended Usage
Not available at this time
As outlined in the OIV’s International Code of Oenological Practices, Calcium Phytate is used:
For the removal of excess iron in wines
Usage in Winemaking:
Phytates can be used to remove metals, especially iron, from liquid food products such as wines and other beverages. It is also used for anti-foaming, desiccating, ion exchange, lubricating, releasing or anti-stick and the removal of excessive iron and heavy metals, and to prevent metallic hazes.
See FIVS technical papers for more information - click here.
