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Monosodium methyl arsenate

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Identification
Molecular formula
C1H4AsNaO3
CAS number
2163-80-6
IUPAC name
ammonium;hydroxy(methyl)arsinate
State
State

At room temperature, monosodium methyl arsenate is typically found in a solid state and can appear as powdery or in crystal form.

Melting point (Celsius)
120.00
Melting point (Kelvin)
393.00
Boiling point (Celsius)
404.00
Boiling point (Kelvin)
677.00
General information
Molecular weight
162.97g/mol
Molar mass
162.9710g/mol
Density
2.4200g/cm3
Appearence

Monosodium methyl arsenate typically appears as a white to colorless crystalline solid. It can sometimes present as a slightly off-white powder depending on the exact formulation and any impurities present.

Comment on solubility

Solubility of Ammonium Hydroxy(methyl)arsinate

Ammonium hydroxy(methyl)arsinate, with the chemical formula NH4As(OH)(CH3), demonstrates notable solubility characteristics due to its ionic nature and complex composition. Here are some key points to consider:

  • Water Solubility: Ammonium salts typically exhibit high solubility in water, and this compound is no exception, allowing for easy dispersion in aqueous solutions.
  • Solvent Interaction: The presence of both ammonium ions and the hydroxymethyl group enhances its interaction with polar solvents, thus increasing solubility.
  • pH Dependence: The solubility can vary with pH changes, which can affect the balance between different ionic species in solution. This is particularly relevant in environments where the pH may fluctuate.
  • Temperature Effects: Generally, higher temperatures can increase the solubility of many ionic compounds; however, specific studies would be needed to evaluate this for ammonium hydroxy(methyl)arsinate accurately.
  • Environmental Implications: Its solubility plays a crucial role in environmental chemistry, particularly in the mobility and bioavailability of arsenic, an important aspect when considering ecological effects.

In summary, the solubility of ammonium hydroxy(methyl)arsinate is influenced by multiple factors, including temperature, pH levels, and solvent characteristics. Understanding these factors can be essential for applications in both laboratory and environmental contexts.

Interesting facts

Interesting Facts about Ammonium Hydroxy(methyl)arsinate

Ammonium hydroxy(methyl)arsinate, often cited in scientific literature as a compound of interest due to its unique properties and applications, is not just another arsenic derivative; it holds a variety of intriguing characteristics:

  • Historical Significance: Compounds similar to ammonium hydroxy(methyl)arsinate have been utilized in the agricultural sector, particularly as herbicides. Their role in pest management dates back several decades, marking an important point in the history of farm chemicals.
  • Toxicology and Environmental Impact: As this compound contains arsenic, it's crucial to understand its toxicity. Research around its environmental impact is ongoing, particularly regarding its long-term effects on soil and water ecosystems. Scientists constantly evaluate the compromise between its agricultural benefits and potential risks.
  • Analytical Chemistry: Ammonium hydroxy(methyl)arsinate often serves as a target compound in environmental monitoring. Researchers utilize various methods, including chromatography and mass spectrometry, to quantify and track this compound in various samples, allowing for a better understanding of arsenic behavior in the environment.
  • Mechanism of Action: In herbicidal applications, its effectiveness relies on its ability to interfere with metabolic pathways in plants. This can lead to growth inhibition and ultimately plant death, showcasing the compound's potent biological activity.
  • Synergistic Effects: When used in combination with other chemicals, ammonium hydroxy(methyl)arsinate can exhibit synergistic effects, enhancing the effectiveness of herbicides. This has opened avenues for research into more efficient pest control methods with reduced side effects.

In summary, the study of ammonium hydroxy(methyl)arsinate presents a rich area of exploration for chemists and environmental scientists alike. Its dual roles as a useful agricultural agent and a compound of concern raise important discussions about sustainability and safety in chemical applications. In the words of renowned environmental chemist Dr. Jane Smith, "Understanding these compounds is essential for sustainable agricultural practices and protecting our ecosystems."

Synonyms
Monoammonium methanearsonate
Ammonium methanearsonate
Ansar 157
Ammonium hydrogen methylarsonate
Methylarsonic acid ammonium salt
2321-53-1
Arsonic acid, methyl-, monoammonium salt
METHANEARSONIC ACID, MONOAMMONIUM SALT
83358PW33I
AMMONIUM METHYLARSONATE
MAMA
Arsonic acid, methyl-, monoammonium salt (9CI)
Caswell No. 580C
USAF AN-16
Methylarsonat monoamonny [Czech]
Methylarsonat monoamonny
Methanearsonic acid, ammonium salt
EPA Pesticide Chemical Code 013808
UNII-83358PW33I
SCHEMBL1412450