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Hydrogen peroxide  [7722-84-1] M 34.0, d 1.110, pK25 11.65.  The 30% material has been steam
distilled using distilled water.  Gross and Taylor  [J Am Chem Soc 72 2075  1950] made 90% H2O2
approximately 0.001M in NaOH and then distilled it under its own vapour pressure, keeping the temperature
below 40o, the receiver being cooled with a Dry-ice/isopropyl alcohol slush.  The 98% material has been
rendered anhydrous by repeated fractional crystallisation in all-quartz vessels.  EXPLOSIVE IN CONTACT
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