Acetonitrile for UV, IR, HPLC, ACS

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Product Name Acetonitrile for UV, IR, HPLC, ACS
CAS Number 75-05-8
Molecular Formula C2H3N
Molar Mass 41.05 g/mol
Appearance Colorless liquid
Purity ≥ 99.9%
Solubility Miscible with water, ethanol, ether
UV Absorbance Passes test
IR Absorbance Passes test
HPLC Grade Yes
ACS Grade Yes
FAQ
What is acetonitrile and how is it used in various analytical techniques?
Acetonitrile is a colorless liquid solvent that is widely used in various analytical techniques, including UV-visible spectroscopy, infrared spectroscopy, high-performance liquid chromatography (HPLC), and in analytical chemistry. It is a polar aprotic solvent, meaning it has high solvating power and low reactivity with common reagents.

What are the benefits of using acetonitrile in UV and IR spectroscopy?
Acetonitrile is commonly used in UV and IR spectroscopy due to its high transparency in the UV and IR regions of the spectrum. It has a low UV cut-off wavelength, making it suitable for analyzing compounds that absorb light in the UV range. In IR spectroscopy, acetonitrile is preferred for its low background noise and ability to dissolve a wide range of compounds.

How is acetonitrile utilized in HPLC applications?
Acetonitrile is a popular solvent in HPLC due to its compatibility with a wide range of analytes and stationary phases. It is commonly used as a mobile phase solvent in reverse-phase HPLC, where it helps separate a wide range of compounds based on their polarities. Acetonitrile also provides good peak shapes and resolution in HPLC separations.

What are the quality specifications for ACS grade acetonitrile?
ACS grade acetonitrile is a high-quality grade suitable for analytical applications. It meets strict purity requirements set by the American Chemical Society (ACS), ensuring low levels of impurities that could interfere with analytical results. ACS grade acetonitrile typically has high UV transmittance, low residue after evaporation, and low water content.

How can I store acetonitrile safely to maintain its quality?
Acetonitrile should be stored in a cool, dry, well-ventilated area away from sources of heat or ignition. It should be kept in a tightly sealed container to prevent evaporation and contamination. Acetonitrile should be stored separately from acids, bases, and oxidizing agents to avoid hazardous chemical reactions. Proper storage conditions help maintain the quality and stability of acetonitrile for analytical use.
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