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Foods Containing Potassium Nitrate

by
author image Dr. Christine Princeton, D.O.
Writing professionally since 1998, Dr. Christine Princeton has been published with the American Osteopathic Association and the Society for Teachers of Family Medicine. Dr. Princeton received her degree at Touro University Nevada College of Osteopathic Medicine and works as a physician in the fields of hospital medicine and women's health.
Foods Containing Potassium Nitrate
A man cuts salami with a knife. Photo Credit EnolaBrain/iStock/Getty Images

Overview

According to the Food Standards Agency, potassium nitrate is a orthorhombic crystal compound found commonly in explosives, fireworks, rocket propellants, fertilizers and tree stump removers. Yet, since the medieval ages, potassium nitrate, also called salt peter, has been used to preserve meats. In historical times, potassium nitrate was made using a combination of straw and urine. Now, more sophisticated measures, which do not involve the use of bodily substances, are used in its creation. Potassium nitrate is a partially effective food preservative that is more frequently used to cure and smoke meats.

Corned Beef

To create that vibrant red color that distinguishes corned beef, potassium nitrate is added to the brine along with the pickling spices. Compare this to the old fashioned corned beef, which was brined in salt water for around a week and is a grayish pink color. Federal regulations limit the amount of potassium nitrate that can be added to brine to 2 lbs. per 100 gallons of the corned beef brine, according to the University of Minnesota.

Cured Salami

The Oregon State University explains that the characteristic pink hue of cooked salami is due to the presence of the potassium nitrate. The nitrate portion of the salt peter not only protects the color of the fresh meat, but also adds more pink pigment due to the reaction of the nitrate with the protein in the meat.

Cured Ham

The National Center for Home Food Preservation explains that one of the major curing ingredients is nitrate, which can be obtained from potassium nitrate or sodium nitrate. U.S. Food and Drug Administration guidelines limit the amount of potassium nitrate to 2.75 oz. per 100 lbs. of chopped ham.

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