Phosphorus trioxide
Also known as Diphosphorus trioxide, Phosphorus sesquioxide, Phosphorus oxide (p2o3)
Key facts
What buyers check first
- Physical form
- Crystals
- Melting point
- 23.8 °C
- Boiling point
- 173.1 °C
- Density
- 2.135 @ 21 °C
- HS code
- 281129
- Category
- Oxides and peroxides
- UN number
- UN 2578
What is Phosphorus trioxide?
Plain description, key identifiers and synonyms
Phosphorus trioxide appears as white crystalline solid or a liquid (melting point 24 °C). Density 2.14 g / cm3. Toxic and corrosive. May severely irritate skin and eyes. Used to make other chemicals.
Identifiers
Registry numbers, names and line notations, tap to copy
- CAS number
- 1314-24-5 CAS number cross-checked
- Molecular formula
- O3P2
- UNII
- 0LTR52K7HK
- InChIKey
- XDJWZONZDVNKDU-UHFFFAOYSA-N
- InChI
- InChI=1S/O3P2/c1-4-3-5-2
- SMILES (canonical and isomeric)
- O=POP=O
Synonyms
- Diphosphorus trioxide
- Phosphorus sesquioxide
- Phosphorus oxide (p2o3)
- Diphosphortrioxid
- phosphorous trioxide
- Diphosphoxane-1,3-dione
- Phosphorus trioxide [UN2578] [Corrosive]
Physical and chemical properties
Measured values and descriptors computed from the structure
Physical and chemical properties
Measured values, check the supplier specification for your grade
| Physical form | Crystalsexp.Measured value |
|---|---|
| Melting point | 23.8 °Cexp.Measured value |
| Boiling point | 173.1 °Cexp.Measured value |
| Density | 2.135 @ 21 °Cexp.Measured value |
Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.
Computed descriptors
Calculated from the structure, useful for screening and formulation
| Molecular weight | 109.95 g/molcalc.Computed value |
|---|---|
| Exact mass | 109.9323 Dacalc.Computed value |
| LogP (octanol/water) | 1.42calc.Computed value |
| Topological polar surface area | 43.37 Ųcalc.Computed value |
| Hydrogen bond donors | 0calc.Computed value |
| Hydrogen bond acceptors | 3calc.Computed value |
| Rotatable bonds | 2calc.Computed value |
| Heavy atoms | 5calc.Computed value |
| Rings | 0calc.Computed value |
| Aromatic rings | 0calc.Computed value |
| Fraction sp3 carbons | 0calc.Computed value |
| Formal charge | 0calc.Computed value |
| Stereocentres | 0calc.Computed value |
Calculated for screening. Confirm critical figures with the supplier.
Safety and hazards
GHS classification summary, not a safety data sheet
- UN number
- UN 2578
- Transport hazard class
- 8
GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.
Full safety data and first aidPhosphorus trioxide suppliers
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Phosphorus trioxide price
Indicative price range per kg from live supplier offers
Suppliers quote this chemical on request. Send one free request and compare quotes side by side.
Uses and applications
What the substance is used for, by industry and function
Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.
Regulatory status
Inventories, regulations and trade controls that list this substance
No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.
HS code and trade data
Customs classification and reported world trade statistics
Global trade
World import and export statistics for the HS code Phosphorus trioxide is traded under.
Inorganic oxygen compounds of non-metals, not elsewhere classified in subheading 2811.2
- Germany14.9%
- United States13.6%
- France * partner reported9.2%
* Partner reported figures, a lower bound.
The HS code shown for Phosphorus trioxide is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.
Frequently asked questions
Quick answers about Phosphorus trioxide, based on the data on this page
What is Phosphorus trioxide?
What is the CAS number of Phosphorus trioxide?
What is the molecular formula and weight of Phosphorus trioxide?
Is Phosphorus trioxide hazardous?
What is the HS code of Phosphorus trioxide?
Where can I buy Phosphorus trioxide?
What is the price of Phosphorus trioxide?
Guides for buyers
Practical guides that help when you source, ship or handle Phosphorus trioxide
- Article, SourcingHow to write an RFQ that gets fast and accurate quotesWhat suppliers need to quote quickly and comparably: exact product identity, quantity and packing, delivery terms, documents, samples and payment, with a ready to use template.Read
- Guide, Trade and logisticsShipping dangerous goods: UN numbers, classes and packing groupsHow the UN dangerous goods system works for chemicals, from the nine classes and UN numbers to packing groups, UN packaging marks, labels, documents and segregation.Read
- Guide, Trade and logisticsHS codes for chemicals and why they matterHow the Harmonized System classifies chemicals, the chapters that matter, the rules for chemically defined compounds and mixtures, and practical steps to find the right code.Read
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