Phosphorus trioxide photograph

Phosphorus Trioxide

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FormulaP4O6
Molar mass219. 88 g/mol
Melting point23. 8 °C
Acidity (pKa)9. 4
Solubility in waterreacts
EU classification (DSD) (outdated)Toxic (T+)
Date of Reg.
Date of Upd.
ID1196927
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About Phosphorus Trioxide


Phosphorus trioxide is the chemical compound with the molecular formula P₄O₆. Although it should properly be named tetraphosphorus hexoxide, the name phosphorus trioxide preceded the knowledge of the compound's molecular structure, and its usage continues today.

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