E537 - hexacyanomanganate ferreux

Origin

Ferrous hexacyanomanganate is an inorganic pigment, specifically a complex cyanide salt. It is synthesized chemically and does not occur naturally. The production involves the reaction of ferrous salts with hexacyanomanganate ions. The resulting precipitate is then processed for use as a pigment.

Usage

E537, ferrous hexacyanomanganate, is used as a pigment, primarily in plastics. It imparts a reddish-brown color. Its application in food is not permitted. The pigment is valued for its stability and resistance to fading under exposure to light and heat. It is also used in some specialized coatings and inks.

Side Effects

As ferrous hexacyanomanganate is not permitted for use in food, there are no direct concerns about dietary side effects. However, like all complex cyanides, there is a theoretical risk of cyanide release under extreme conditions, such as exposure to strong acids or very high temperatures. However, the cyanide is strongly bound within the complex, making it very stable under normal conditions. Toxicity studies have not been extensively performed, likely due to its limited applications and lack of food use. Exposure through other routes (e.g., inhalation or skin contact) should be minimized, as with any industrial pigment.

Regulatory Status

Ferrous hexacyanomanganate (E537) is not approved as a food additive in the European Union, the United States, or other major regulatory jurisdictions. Its use is restricted to industrial applications, such as in plastics and coatings, where it is subject to regulations governing the use of pigments in those specific materials. It is important to consult local regulations to determine the permissible uses and restrictions on this substance in different applications.