七氧化二氯 Dichlorine heptoxide
（重定向自Perchloric anhydride）
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七氧化二氯是一种氯的氧化物，化学式为Cl2O7，是高氯酸的酸酐。可由高氯酸与五氧化二磷反应制得。
- 2HClO4 + P4O10 → Cl2O7 + H2P4O11
七氧化二氯受热易分解：
- 2Cl2O7 → 2Cl2 + 7O2 (ΔH = 135 kJ/mol)
Perchloric anhydride
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Dichlorine heptoxide 七氧化二氯
（重定向自Perchloric anhydride）
Dichlorine heptoxide is the chemical compound with the formula Cl2O7. This chlorine oxide is the anhydride of perchloric acid. It is produced by the careful distillation of perchloric acid in the presence of the dehydrating agent phosphorus pentoxide:
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