Hypochlorite distinfectant stabilized with calcium chelant
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United States of America Patent
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Feb 6, 1990
Grant Date -
N/A
app pub date -
Aug 31, 1988
filing date -
Aug 31, 1988
priority date (Note) -
Expired
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Abstract
Dilute aqueous sodium hypochlorite solution is stabilized against decomposition during storage by incorporating in it a small proportion of the calcium chelate of disodium ethylenediaminetetraacetic acid. The solution preferably contains by weight at least 95 percent water, from 0.25 to 1 percent sodium hypochlorite, and from 0.005 to 0.25 percent of the calcium chelate. It may be stored for a period of many months and remains effective as a disinfectant for medical environmental surfaces. The solution may also be formulated to contain a synthetic detergent, such as sodium lauryl sulfate, 0.1 to 3 percent, and an alkaline builder, such as sodium metasilicate, to maintain a pH value above 11. Sodium hydroxide may be added to produce a pH above 12.
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