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Barium Peroxide: Barium Oxide Heated in Air
Ondřej Mangl (Wikimedia Commons) · Public domain
Charlie

Created by

Charlie

14. October 2026DE
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Barium Peroxide: Barium Oxide Heated in Air

Barium oxide takes oxygen from the air at about 500 °C and becomes barium peroxide; above 820 °C it gives the oxygen back. The Brin process used this to separate oxygen from air, and the peroxide was once the source of hydrogen peroxide. It is an oxidiser and harmful if swallowed. The picture: barium peroxide on a watch glass.
Intermediate
A day

Instructions

1

Spread it thin

Crush the barium oxide, weigh it, and spread it thin in an open iron crucible so the air can reach it.

Materials for this step:

Barium OxideBarium Oxide150 g

Tools needed:

Mortar and PestleMortar and Pestle
Balance ScaleBalance Scale
Iron CrucibleIron Crucible
Dust MaskDust Mask
Rubber GlovesRubber Gloves
2

Heat in air

Hold the open crucible at about 500 °C in the furnace, checked with the pyrometer, stirring now and then with an iron rod. Never let it go above 820 °C, or the oxygen leaves again.

Tools needed:

Charcoal FurnaceCharcoal Furnace
CharcoalCharcoal
PyrometerPyrometer
Iron RodIron Rod
Crucible TongsCrucible Tongs
Welding GlovesWelding Gloves
Chemical Splash GogglesChemical Splash Goggles
3

Weigh until done

Lift it out each hour, let it cool a little and weigh it. When it stops gaining, it is peroxide (step 4). Keep it in a dry, closed jar away from anything that burns.

Tools needed:

Balance ScaleBalance Scale
Crucible TongsCrucible Tongs
Glass JarGlass Jar
Welding GlovesWelding Gloves
4

Follow the weight

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Materials

1

Tools Required

13

This blueprint makes

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Barium Peroxide

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