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Sulfur and phosphorus compounds

Dimethoxy(oxo)phosphanium

Also known as phosphonic acid dimethyl ester, Phosphinyl radical, dimethoxy-, Phosphorous acid dimethyl ester

CAS 31682-64-1Formula C2H6O3P+Molar mass 109.04 g/molEC 212-783-8
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Dimethoxy(oxo)phosphanium chemical structure, C2H6O3P+, CAS 31682-64-1
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
31682-64-1
Formula
C2H6O3P+
Molar mass
109.04 g/mol
EC number
212-783-8
HS code
292029
Category
Sulfur and phosphorus compounds

What is Dimethoxy(oxo)phosphanium?

Plain description, key identifiers and synonyms

Dimethyl phosphite is an organic molecular entity.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
dimethoxy(oxo)phosphanium
CAS number
31682-64-1 CAS number cross-checkedOther or deprecated CAS: 868-85-9
EC number
212-783-8
Molecular formula
C2H6O3P+
UNII
ST4TBO000H
MDL number
MFCD00044633
InChIKey
YLFBFPXKTIQSSY-UHFFFAOYSA-N
InChI
InChI=1S/C2H6O3P/c1-4-6(3)5-2/h1-2H3/q+1
SMILES (canonical and isomeric)
CO[P+](=O)OC

Synonyms

  • phosphonic acid dimethyl ester
  • Phosphinyl radical, dimethoxy-
  • Phosphorous acid dimethyl ester
  • dimethoxyphosphino-1-one
  • Dimethylfosfit
  • Dimethylfosfonat
  • Phosphinyl, dimethoxy-
  • dimethoxy(oxo)phosphonium
  • Dimethylester kyselini fosforite
  • Dimethylester kyseliny fosforite
  • dimethoxy-oxo-phosphanium
  • Dimethoxyphosphinylradical
  • dimethyl hydrogenphosphite
  • O,O-Dimethyl phosphonate
  • Dimethyl phosphite, 98%
  • methoxyphosphonoyloxymethane
  • (CH3O)2PHO
  • C2H6O3P+
  • Ylfbfpxktiqssy-uhfffaoysa-
  • Dimethyl ester of phosphonic acid
  • Dimethyl hydrogen phosphite
  • Dimethyl phosphite, purum, >=98.0% (GC)
  • Dimethyl Phosphite(Discontinued,See C4X-113573)

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
109.04 g/molcalc.
Exact mass
109.0049 Dacalc.
LogP (octanol/water)
0.94calc.
Topological polar surface area
35.53 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
2calc.
Heavy atoms
6calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
1calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

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.

Dimethoxy(oxo)phosphanium suppliers

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All 3 suppliers

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Where suppliers are based

3 suppliers in 2 countries

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Dimethoxy(oxo)phosphanium 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 Dimethoxy(oxo)phosphanium is traded under.

HS 2920.29Indicative HS code

Phosphite esters and their salts, their halogenated, sulphonated, nitrated or nitrosated…

World exports in 2024
$437M
+9.3% vs 2023, imports $367M
2019 to 2024
Top exporters
  1. China26.4%
  2. South Korea19.9%
  3. Germany12.8%
Top importers
  1. China10.9%
  2. Germany9.3%
  3. Switzerland * partner reported7.7%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Dimethoxy(oxo)phosphanium is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Dimethoxy(oxo)phosphanium, based on the data on this page

What is Dimethoxy(oxo)phosphanium?

Dimethyl phosphite is an organic molecular entity.

What is the CAS number of Dimethoxy(oxo)phosphanium?

The CAS registry number of Dimethoxy(oxo)phosphanium is 31682-64-1. Other or deprecated CAS numbers: 868-85-9.

What is the molecular formula and weight of Dimethoxy(oxo)phosphanium?

The molecular formula of Dimethoxy(oxo)phosphanium is C2H6O3P+ and its molar mass is 109.04 g/mol.

What is Dimethoxy(oxo)phosphanium used for?

Known uses and roles of Dimethoxy(oxo)phosphanium include building blocks in research and laboratory.

Is Dimethoxy(oxo)phosphanium hazardous?

No GHS hazard classification for Dimethoxy(oxo)phosphanium 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 Dimethoxy(oxo)phosphanium?

Dimethoxy(oxo)phosphanium is usually classified under HS code 292029 (Phosphite esters and their salts, their halogenated, sulphonated, nitrated or nitrosated…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Dimethoxy(oxo)phosphanium?

CompoundList lists 3 suppliers of Dimethoxy(oxo)phosphanium 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 Dimethoxy(oxo)phosphanium?

Suppliers quote Dimethoxy(oxo)phosphanium 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

Practical guides that help when you source, ship or handle Dimethoxy(oxo)phosphanium

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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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