04/18/06, 11:20 AM
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"Mobile Homesteaders"
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Join Date: Feb 2006
Location: Highly Variable
Posts: 577
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I would use the barrels for animal water without concern.
From Wikipedia (often a good place to start with any question) http://en.wikipedia.org/wiki/Phosphoric_acid
Processed food use
It is also used to acidify foods and beverages such as various colas, but not without controversy as to its health effects. It provides a tangy taste, and being an agro-industrial chemical, is available cheaply and in large quantities. The low cost and bulk availability is unlike more expensive natural seasonings that give comparable flavors, such as ginger for tangyness, or citric acid for sourness, obtainable from lemons and limes.
Biological effects on bone calcium
Phosphoric acid, used in many soft drinks (primarily so in cola drinks, such as the U.S. market dominating Coca Cola and Pepsi Cola), has become suspect in the increase of the bone deficiency disease osteoporosis in young women.[citation needed] Traditionally, osteoporosis (literally "porous bones") has been seen mostly in post-menopausal women, particularly those who did not build high bone density in youth, typically due to insufficient calcium intake. An excess of phosphorus may lead to poor bone density, however. Nutritionists point out that the body will attempt to maintain a balance between ions of phosphorus and calcium in the blood. When an excess of phosphorus (through phosphoric acid, for example) is introduced, the body's chemical balance mechanisms will attempt to maintain the proper calcium-phosphorus ionic ratio by extracting calcium from the bones. The excess phosphorus and calcium are eventually excreted.[citation needed] Other chemicals such as caffeine (also a significant component of popular common cola drinks) are also suspected as possible contributors to low bone density, which is now seen in increasing prevalence in men of late middle age.[citation needed].
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