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Chemical substance

Hydrogen methylarsonate

Also known as methylarsonate(1-), hydroxy(methyl)arsinate, Methylarsonate

CAS 51952-66-0Formula CH4AsO3-Molar mass 138.96 g/mol
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Hydrogen methylarsonate chemical structure, CH4AsO3-, CAS 51952-66-0
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
51952-66-0
Formula
CH4AsO3-
Molar mass
138.96 g/mol
HS code
293190

What is Hydrogen methylarsonate?

Plain description, key identifiers and synonyms

Methylarsonate(1-) is an organoarsonic acid anion. It is a conjugate base of a methylarsonic acid. It is a conjugate acid of a methylarsonate(2-).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
hydroxy(methyl)arsinate
CAS number
51952-66-0 CAS number cross-checked
Molecular formula
CH4AsO3-
InChIKey
QYPPRTNMGCREIM-UHFFFAOYSA-M
InChI
InChI=1S/CH5AsO3/c1-2(3,4)5/h1H3,(H2,3,4,5)/p-1
SMILES (canonical and isomeric)
C[As](=O)(O)[O-]

Synonyms

  • methylarsonate(1-)
  • hydroxy(methyl)arsinate
  • Methylarsonate
  • methanearsonate
  • methylarsenate
  • MMAV
  • MeAsO2(OH)(-)
  • [As(CH3)O2(OH)](-)

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
138.96 g/molcalc.
Exact mass
138.9382 Dacalc.
LogP (octanol/water)
-1.66calc.
Topological polar surface area
60.36 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
5calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
-1calc.
Stereocentres
1calc.
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.

Hydrogen methylarsonate suppliers

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Hydrogen methylarsonate 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

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 Hydrogen methylarsonate is traded under.

HS 2931.90Indicative HS code

Organo-inorganic compounds, other than tetramethyl lead, tetraethyl lead, tributyltin compounds…

World exports in 2024
$3.97B
+5.3% vs 2023, imports $3.93B
2019 to 2024
Top exporters
  1. China28.3%
  2. United States15.6%
  3. Germany15.1%
Top importers
  1. United States14.6%
  2. China13.0%
  3. South Korea8.5%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

Quick answers about Hydrogen methylarsonate, based on the data on this page

What is Hydrogen methylarsonate?

Methylarsonate(1-) is an organoarsonic acid anion. It is a conjugate base of a methylarsonic acid. It is a conjugate acid of a methylarsonate(2-).

What is the CAS number of Hydrogen methylarsonate?

The CAS registry number of Hydrogen methylarsonate is 51952-66-0.

What is the molecular formula and weight of Hydrogen methylarsonate?

The molecular formula of Hydrogen methylarsonate is CH4AsO3- and its molar mass is 138.96 g/mol.

Is Hydrogen methylarsonate hazardous?

No GHS hazard classification for Hydrogen methylarsonate 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 Hydrogen methylarsonate?

Hydrogen methylarsonate is usually classified under HS code 293190 (X. ORGANO-INORGANIC COMPOUNDS, HETEROCYCLIC COMPOUNDS, NUCLEIC ACIDS AND THEIR SALTS…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Hydrogen methylarsonate?

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What is the price of Hydrogen methylarsonate?

Suppliers quote Hydrogen methylarsonate 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 Hydrogen methylarsonate

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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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