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Diammonium hydrogen arsenate

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Identification
Molecular formula
(NH4)2HAsO4
CAS number
7784-44-3
IUPAC name
diammonium;hydrogen arsorate
State
State

At room temperature, diammonium hydrogen arsenate is in a solid state. It is stable under normal conditions but must be handled with care due to its toxicity as an arsenic compound.

Melting point (Celsius)
155.00
Melting point (Kelvin)
428.15
Boiling point (Celsius)
220.00
Boiling point (Kelvin)
493.15
General information
Molecular weight
195.99g/mol
Molar mass
195.9870g/mol
Density
2.2830g/cm3
Appearence

Diammonium hydrogen arsenate appears as colorless crystals. It is typically odorless and its solid crystal form is clearly defined, often forming prismatic or tabular shapes. When viewed closely, the crystalline surface is smooth and has a reflective quality, lending it a glass-like luster.

Comment on solubility

Solubility of Diammonium Hydrogen Arsenate

Diammonium hydrogen arsenate, with the chemical formula (NH4)2HAsO4, exhibits interesting solubility characteristics that are essential to understand for its applications in various fields.

Solubility in Water

This compound is known to be highly soluble in water, which is a key factor influencing its utility in agricultural and industrial applications. The solubility can be attributed to:

  • Strong ionic interactions between ammonium ions (NH4+) and arsenate ions (HAsO42-).
  • Hydration effects that stabilize the ions in solution.
  • Relatively low lattice energy, allowing for easy dissociation in aqueous environments.

Effect of Temperature on Solubility

As with many salts, the solubility of diammonium hydrogen arsenate tends to increase with a rise in temperature. This trend indicates that:

  • At higher temperatures, the kinetic energy of water molecules increases, promoting the dissolution of the compound.
  • Temperature variations can significantly influence the concentrations achievable in solution, thus affecting the compound's application.

Solubility in Other Solvents

While diammonium hydrogen arsenate is primarily soluble in water, its solubility in organic solvents is generally limited. Some characteristics include:

  • Minimal solubility in common organic solvents like ethanol or methanol.
  • Potential reactions with specific solvents that may affect its stability.

Understanding the solubility of diammonium hydrogen arsenate is crucial, as it not only influences its behavior in various processes but also ensures effective application in practices such as agriculture and chemical synthesis.

Interesting facts

Interesting Facts about Diammonium Hydrogen Arsenate

Diammonium hydrogen arsenate is a fascinating compound that has garnered attention for its diverse applications and unique properties. Below are some notable aspects of this compound:

  • Dual Ammonium Ion: The presence of two ammonium ions (NH4+) makes this compound rich in nitrogen, which is integral for various biological processes and fertilizers.
  • Arsenate Component: The inclusion of the arsenate ion (AsO43-) is particularly interesting, as arsenic compounds often have a reputation for being toxic, but in controlled amounts, can also serve as essential nutrients for some organisms.
  • Agricultural Use: Diammonium hydrogen arsenate is used in agriculture as a fertilizer, particularly in regions with arsenic-resistant crop varieties, illustrating its dual role in nutrients and potential toxicity.
  • Research Implications: This compound is also studied in environmental chemistry, especially concerning its behavior and movement in soil and water, thus contributing to our understanding of arsenic and nitrogen cycling.
  • Historical Significance: Compounds containing arsenic have a long history in various fields, from agriculture to medicine, making diammonium hydrogen arsenate part of an intriguing scientific narrative.

As noted by chemists, "Understanding the delicate balance between the benefits and risks of elemental arsenic is crucial for sustainable agriculture and environmental health." The study of diammonium hydrogen arsenate serves as a prime example of how chemistry intersects with ecology, agriculture, and health.

In conclusion, diammonium hydrogen arsenate is not just a simple fertilizer; it embodies the complexities of chemical interactions and the importance of careful study in mitigating risks while maximizing benefits in agricultural practices.

Synonyms
AMMONIUM ARSENATE
Ammonium acid arsenate
7784-44-3
Dibasic ammonium arsenate
DIAMMONIUM ARSENATE
Diammonium hydrogenarsenate
Secondary ammonium arsenate
Diammonium hydrogen arsenate
Diammonium monohydrogen arsenate
UN1546
Arsenic acid (H3AsO4), diammonium salt
AMMONIUM ARSENATE, (SOLID)
AMMONIUM ARSENATE, [SOLID]
Ammonium arsenic acid
diammonium hydrogen arsorate
(NH4)3AsO4
AMMONIUM ARSENATE ((NH4)2ASHO4)
AMMONIUM ARSENATE ((NH4)2HASO4)
diazanium;hydrogen arsorate
Arsenic acid, diammonium salt
EINECS 232-067-9
Ammonium arsenate dibasic
Diammonium hydrogenarsenate(V)
DTXSID0036895
Ammonium arsenate [UN1546] [Poison]
Q1587202