Phosphorus pentoxide
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Phosphorus pentoxide is a chemical compound with molecular formula P4O10 (with its common name derived from its empirical formula, P2O5). This white crystalline solid is the anhydride of phosphoric acid. It is a powerful desiccant and dehydrating agent.
Quick Facts Names, Identifiers ...
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Names | |||
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IUPAC names
Tetraphosphorus decaoxide Tricyclo[3.3.1.13,7]tetraphosphoxane 1,3,5,7-tetraoxide | |||
Systematic IUPAC name
2,4,6,8,9,10-Hexaoxa-1λ5,3λ5,5λ5,7λ5-tetraphosphatricyclo[3.3.1.13,7]decane 1,3,5,7-tetraoxide | |||
Other names
Diphosphorus pentoxide Phosphorus(V) oxide Phosphoric anhydride Tetraphosphorus decaoxide Tetraphosphorus decoxide | |||
Identifiers | |||
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3D model (JSmol) |
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ChEBI | |||
ChemSpider |
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ECHA InfoCard | 100.013.852 | ||
PubChem CID |
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RTECS number |
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UNII | |||
CompTox Dashboard (EPA) |
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Properties | |||
P4O10 | |||
Molar mass | 283.9 g mol−1 | ||
Appearance | White powder Very deliquescent | ||
Odor | Odorless | ||
Density | 2.39 g/cm3 | ||
Melting point | 340 °C (644 °F; 613 K) | ||
Boiling point | 360 °C (sublimes) | ||
exothermic hydrolysis | |||
Vapor pressure | 1 mmHg @ 385 °C (stable form) | ||
Hazards | |||
Occupational safety and health (OHS/OSH): | |||
Main hazards |
reacts with water, strong dehydrating agent, corrosive | ||
GHS labelling: | |||
Danger | |||
H314 | |||
P280, P301+P330+P331, P303+P361+P353, P305+P351+P338, P310 | |||
NFPA 704 (fire diamond) | |||
Safety data sheet (SDS) | MSDS | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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