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A19862 Acetonitrile, 99%

CAS Number
Methyl cyanide

Stock No. Size Price ($) Quantity Availability
A19862-AP 500ml 31.00
A19862-0F 2500ml 93.20
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Acetonitrile, 99%


Chemical Properties

Formula Weight
Melting point
Boiling Point
Flash Point
Refractive Index
Storage & Sensitivity
Ambient temperatures.
Miscible with water, alcohols, ethers, acetone, chloroform, carbon tetrachloride and ethylene chloride. Immiscible with saturated hydrocarbons (petroleum fractions).


Acetonitrile is utilized as a polar aprotic solvent in organic synthesis, and in the purification of butadiene. It is used in all the analytical laboratories as a major component of mobile phase in High Performance Liquid Chromatography (HPLC) and in Liquid Chromatography - Mass Spectrometry (LC-MS). It is used for the extraction of fatty acids, spinning fibers and casting and molding of plastic materials. Aqueous two-phase systems based on acetonitrile and carbohydrates play an important character in the extraction and purification of biomolecules called vanillins. It acts as a stabilizer for the chlorinated solvents, and finds use in the production of DNA oligonucleotides.


Incompatible with alkali metals, acids, bases, reducing agents and oxidizing agents. Highly flammable. Store it away from heat, sparks, and flame exposure.

Literature References

Polar aprotic solvent for a wide variety of reactions, including nucleophilic substitutions, oxidations, reductions and organometallic reactions. Widely used with crown ethers for the generation of 'naked' anions from their salts; see, e.g. 18-Crown-6, A11249 . Preferred solvent for RuO4 oxidations, due to its coordinating ability; see Ruthenium(III)­ chloride hydrate, 11043 .

Undergoes the Ritter reaction with alcohols or olefins in the presence of acid to give N-substituted acetamides. For benzylic alcohols, modified conditions employing boron trifluoride etherate give high yields: Synth. Commun., 24, 601 (1994). For an example, see 4-Methyl­benzyl­ alcohol, A15315 .

For use in the mild conversion of amides to nitriles, see Benzamide, A10501 .

Cardoso, G. B.; Mourao, T.; Pereira, F. M.; Freire, M. G.; Fricks, A. T.; Soares, C. M. F.; Lima, A. S. Aqueous two-phase systems based on acetonitrile and carbohydrates and their application to the extraction of vanillin. J. Electroanal. Chem. 2007, 608 (2), 141-147.

Lam, T. W.; Zhang, H.; Siu, S. K. Reductions of Oxygen, Carbon Dioxide, and Acetonitrile by the Magnesium(II)/Magnesium(I) Couple in Aqueous Media: Theoretical Insights from a Nano-Sized Water Droplet. J. Phys. Chem. A 2015, 119 (12), 2780-2792.

GHS Hazard and Precautionary Statements

Hazard Statements: H225-H302-H312-H319-H332

Highly flammable liquid and vapour. Harmful if swallowed. Harmful in contact with skin. Causes serious eye irritation. Harmful if inhaled.

Precautionary Statements: P210-P233-P240-P241-P242-P243-P260-P264b-P270-P271-P280-P301+P312-P303+P361+P353-P304+P340-P305+P351+P338-P312-P314-P330-P337+P313-P363-P370+P378q-P501c

Keep away from heat/sparks/open flames/hot surfaces. - No smoking. Keep container tightly closed. Ground/bond container and receiving equipment. Use explosion-proof electrical/ventilating/lighting/ equipment. Use only non-sparking tools. Take precautionary measures against static discharge. Do not breathe dust/fume/gas/mist/vapours/spray. Wash face, hands and any exposed skin thoroughly after handling Do not eat, drink or smoke when using this product. Use only outdoors or in a well-ventilated area. Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Get medical advice/attention if you feel unwell. Rinse mouth. If eye irritation persists: Get medical advice/attention. Wash contaminated clothing before reuse. In case of fire: Use CO2, dry chemical, or foam Dispose of contents/ container to an approved waste disposal plant

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