Silicate, Aluminium (Kaolin)
Aluminum silicate is clay formed by the weathering of volcanic ash and is an alternative to bentonite. It is an absorbent material that is able to bond with the floating particles that cause cloudiness in wine. Recognised by the OIV, Aluminum silicate is permitted for use in grape wine in over 50 countries worldwide.
Kaolin is a natural hydrated aluminum silicate. It is used as a clarification agent in wines. Fine white or yellowish-white powder which is oily to the touch. When weakened in hot water it releases a clay-like odor. It is insoluble in water and dilute acids. The product of the alkaline liquefaction of kaolin taken up by water exhibits the reaction properties of alkaline aluminates and alkaline silicates. For further substance information, please see the International Oenological Codex.
Synonym(s): Kaolin, Light or Heavy
CAS Number: 12141-46-7
E Number: 559
INS Number: 559
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 Clarification Kaolin : processing aid Recommended Usage (International Code of Oenological Practices – Annex: Maximum Acceptable Limits) Not available this time
FIVS
Classification Category 3 – Not naturally occurring in grapes and insignificant treatment residual in wine Recommended Usage Please refer to the Joint FAO/WHO Expert Committee on Food Additives’ (JECFA) “acceptable daily intake” (ADI) for recommended usage.
As outlined in the OIV’s International Code of Oenological Practices, Aluminum Silicate is used:
As a clarification agent in wines. Usage in Winemaking: Aluminum silicate is a clay formed by the weathering of volcanic ash and is an alternative to bentonite. It is an absorbent material that is able to bond with the floating particles that cause cloudiness in wine.
See FIVS technical papers for more information - click here.
