E224

Functions: en:Antioxidant, en:Preservative

Potassium metabisulfite, K2S2O5, also known as potassium pyrosulfite, is a white crystalline powder with a pungent sulfur odour. The main use for the chemical is as an antioxidant or chemical sterilant. It is a disulfite and is chemically very similar to sodium metabisulfite, with which it is sometimes used interchangeably. Potassium metabisulfite is generally preferred out of the two as it does not contribute sodium to the diet. Potassium metabisulfite has a monoclinic crystal structure which decomposes at 190 °C, yielding potassium sulfite and sulfur dioxide: K2S2O5-s- → K2SO3-s- + SO2-g- - Wikipedia

EFSA evaluation: Scientific Opinion on the re-evaluation of sulfur dioxide -E 220-, sodium sulfite -E 221-, sodium bisulfite -E 222-, sodium metabisulfite -E 223-, potassium metabisulfite -E 224-, calcium sulfite -E 226-, calcium bisulfite -E 227- and potassium bisulfite -E 228- as food additives (2016-04-14)

Elikagaien Segurtasunerako Europako Agintaritzak (EFSA) biztanle-talde batzuek E224-(e)ko Eguneko Ingesta Onargarrira (EIO) iristeko edo hau gainditzeko arrisku handia dute.

To evaluate your exposure to the E224 food additive, you can browse our list of products that contain it. See the list of products with E224 below.

	Haurrak	Toddlers	Haurrak	Adolescents	Helduak	Adinekoak
	< 1	1etik 2ra	3tik 9ra	10tik 17ra	18tik 64ra	65+
High risk (50% of people or more)
Moderate risk (5% of people or more)

: Eguneko Ingesta Onargarrira (EIO) iristeko edo hau gainditzeko arriskua