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Sodium and potassium metabisulfite have many major and niche uses. It is widely used for preserving food and beverages.. Sodium metabisulfite is added as an excipient to medications which contain adrenaline (epinephrine), in order to prevent the oxidation of adrenaline. [6]
"Sulfite" is jargon that encompasses a variety of materials that are commonly used as preservatives or food additive in the production of diverse foods and beverages. Although sulfite salts are relatively nontoxic, their use has led to controversy, resulting in extensive regulations. Sulfites are a source of sulfur dioxide (SO 2), a bactericide.
Thanks to artificial preservatives, fruits, vegetables, meats and dairy products last much longer now than they naturally would, and that is not necessarily good news.
Its preservatives work primarily by inhibiting the growth of microorganisms through oxidation. [3] However, because different kinds of wine have different aromas, colors and flavors, they should not use the same preservatives. [3] For example, the preservatives added to white wine are mainly ascorbic acid (vitamin C) and sorbic acid. [13]
A typical Campden tablet contains 0.44 g of sodium metabisulfite, plus filler; eight of these are equivalent to one-half level teaspoon (2.5 mL) of sodium metabisulfite. Other Campden tablet formulations use potassium metabisulfite. Both are referred to, interchangeably, as sulfites, and the 'bi' can be found as 'di'.
Artificial preservatives meet some of these challenges by preserving freshness for longer periods of time, but these preservatives can cause negative side-effects as well. Sodium nitrite is a preservative used in lunch meats, hams, sausages, hot dogs, and bacon to prevent botulism and other foodborne pathogens.
The sulfite ion is the conjugate base of bisulfite. Although its acid (sulfurous acid) is elusive, [1] its salts are widely used. Sulfites are substances that naturally occur in some foods and the human body. They are also used as regulated food additives. [2] When in food or drink, sulfites are often lumped together with sulfur dioxide. [3]
Critics have long argued that while studying the effects of Red Dye No. 3 in humans poses ethical and scientific challenges, its ban in cosmetics should have logically extended to the food supply.