Methylarsonic acid

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CAS Number124-58-3
Molecular FormulaCH3AsO(OH)2
Molecular Weight139.970
InChI KeyQYPPRTNMGCREIM-UHFFFAOYSA-N
Synonyms
  • Methylarsonic acid
  • 124-58-3
  • Monomethylarsonic acid
  • Arsonic acid, methyl-
  • METHANEARSONIC ACID
  • Methylarsinic acid
  • Monomethylarsinic acid
  • Methylarsenic acid
  • Kyselina methylarsonova
  • DSMA (JMAF)
  • MeAsO(OH)2
  • J37VJ5709S
  • DTXSID4020903
  • CHEBI:29852
  • RefChem:818523
  • DTXCID80903
  • 204-705-6
  • Monomethylarsonate
  • Methylarsonic acid [ISO]
  • methyl Arsonic acid
  • Kyselina methylarsonova [Czech]
  • Methylarsonate
  • HSDB 845
  • CH5AsO3
  • EINECS 204-705-6
  • BRN 1739373
  • UNII-J37VJ5709S
  • CCRIS 9324
  • NCIOpen2_000482
  • NCIOpen2_000522
  • NCIOpen2_004484
  • NCIOpen2_008444
  • 4-04-00-03682 (Beilstein Handbook Reference)
  • SCHEMBL122145
  • CHEMBL1743208
  • METHANEARSONIC ACID [MI]
  • METHYLARSONIC ACID [HSDB]
  • METHYLARSONIC ACID [IARC]
  • METHANEARSONIC ACID [WHO-DD]
  • MFCD00155377
  • AKOS040753035
  • Monomethylarsonic Acid Standard Solution
  • DB-255297
  • NS00079162
  • C07294
  • Q1976186
  • MONOMETHYLARSONIC ACID (SEE METHYLARSONIC ACID) [IARC]
  • 4950-59-8

Applications:

Uv-Vis Spectrum of Methylarsonic acid

March 3, 2026

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If you are looking for optimized HPLC method to analyze Methylarsonic acid check our HPLC Applications library

For optimal results in HPLC analysis, it is recommended to measure absorbance at a wavelength that matches the absorption maximum of the compound(s) being analyzed. The UV spectrum shown can assist in selecting an appropriate wavelength for your analysis. Please note that certain mobile phases and buffers may block wavelengths below 230 nm, rendering absorbance measurement at these wavelengths ineffective. If detection below 230 nm is required, it is recommended to use acetonitrile and water as low UV-transparent mobile phases, with phosphoric acid and its salts, sulfuric acid, and TFA as buffers.
For some compounds, the UV-Vis Spectrum is affected by the pH of the mobile phase. The spectra presented here are measured with an acidic mobile phase that has a pH of 3 or lower.

Application Analytes:
Methylarsonic acid
SIELC Technologies usually develops more than one method for each compound. Therefore, this particular method may not be the best available method from our portfolio for your specific application. Before you decide to implement this method in your research, please send us an email to research@sielc.com so we can ensure you get optimal results for your compound/s of interest.