Stabilized aqueous diazo solutions
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United States of America Patent
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Jun 27, 2000
Grant Date -
N/A
app pub date -
Sep 9, 1998
filing date -
Mar 18, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A stabilized aqueous solution of a diazo compound has the formula: ##STR1## where X.sup.1 is selected from nitro and chloro, X.sup.2 is selected from nitro, chloro and hydrogen, and Y is an acid-derived anion. The solution has a pH of about 1.5 or below and a diazo concentration of about 2 wt % or less. The solution is useful as an extractant/developer for petroleum fuel markers.
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