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Sulfur and phosphorus compounds

(Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium

Also known as [Oxo(phenyl)-lambda~5~-phosphanylidene]oxidanium, Benzenephosphinic acid, Phosphinic acid, phenyl-

CAS 121-70-0Formula C6H6O2P+Molar mass 141.09 g/mol
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(Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium chemical structure, C6H6O2P+, CAS 121-70-0
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
121-70-0
Formula
C6H6O2P+
Molar mass
141.09 g/mol
HS code
293149
Category
Sulfur and phosphorus compounds

What is (Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium?

Plain description, key identifiers and synonyms

(Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium is a chemical substance with the molecular formula C6H6O2P+ and a molar mass of 141.09 g/mol. Its CAS registry number is 121-70-0. The IUPAC name is hydroxy-oxo-phenylphosphanium.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
hydroxy-oxo-phenylphosphanium
CAS number
121-70-0 CAS number cross-checkedOther or deprecated CAS: 1779-48-2
Molecular formula
C6H6O2P+
MDL number
MFCD00002131
InChIKey
KNQVWTDLQQGKSV-UHFFFAOYSA-O
InChI
InChI=1S/C6H5O2P/c7-9(8)6-4-2-1-3-5-6/h1-5H/p+1
SMILES (canonical and isomeric)
C1=CC=C(C=C1)[P+](=O)O

Synonyms

  • [Oxo(phenyl)-lambda~5~-phosphanylidene]oxidanium
  • Benzenephosphinic acid
  • Phosphinic acid, phenyl-
  • Benzenephosphonous acid
  • Phosphinic acid, P-phenyl-
  • hydroxy-oxo-phenylphosphanium
  • phenyl phosphinic acid
  • Phosphonousacid,phenyl, phenyl phosphinic acid, phenyl-phosphinicaci, PHENYLPHOSPHONOUS ACID, phenyl-H-phosphinic acid
  • Phenylphosphinic acid, 99%
  • hydroxy-oxo-phenyl-phosphonium
  • C6H6O2P+

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
141.09 g/molcalc.
Exact mass
141.01 Dacalc.
LogP (octanol/water)
1.05calc.
Topological polar surface area
37.3 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
1calc.
Heavy atoms
9calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0calc.
Formal charge
1calc.
Stereocentres
1calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccccc1

c1ccccc1

1 ring, 6 atoms, the Benzene ring system.

485,677 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

(Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium suppliers

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Where suppliers are based

4 suppliers in 2 countries

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(Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

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 (Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium is traded under.

HS 2931.49Indicative HS code

Non-halogenated organo-phosphorous derivatives, other

World exports in 2024
$3.44B
−6.5% vs 2023, imports $3.07B
2022 to 2024
Top exporters
  1. China54.9%
  2. United States25.4%
  3. Germany5.1%
Top importers
  1. United States20.9%
  2. Argentina14.9%
  3. Brazil14.3%
Reported customs values in USD, not prices.Full trade data

The HS code shown for (Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about (Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium, based on the data on this page

What is (Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium?

(Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium is a chemical substance with the molecular formula C6H6O2P+ and a molar mass of 141.09 g/mol. Its CAS registry number is 121-70-0. The IUPAC name is hydroxy-oxo-phenylphosphanium.

What is the CAS number of (Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium?

The CAS registry number of (Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium is 121-70-0. Other or deprecated CAS numbers: 1779-48-2.

What is the molecular formula and weight of (Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium?

The molecular formula of (Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium is C6H6O2P+ and its molar mass is 141.09 g/mol.

What is (Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium used for?

Known uses and roles of (Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium include building blocks in research and laboratory and screening compounds in research and laboratory.

Is (Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium hazardous?

No GHS hazard classification for (Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of (Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium?

(Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium is usually classified under HS code 293149 (Non-halogenated organo-phosphorous derivatives, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy (Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium?

CompoundList lists 4 suppliers of (Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium in United States and China. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of (Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium?

Suppliers quote (Oxo(phenyl)-lambda~5~-phosphanylidene)oxidanium on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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