Acetonitrile is one of the most important polar aprotic solvents in modern chemistry, yet many procurement teams struggle to find a reliable source for bulk material. This guide explains what acetonitrile is, why its purity matters, which grades are available, and how bulk buyers should evaluate packaging and suppliers for CAS 75-05-8.
What Is Acetonitrile?
Acetonitrile, also known as methyl cyanide, has the chemical formula CH3CN and CAS number 75-05-8. It is a clear, colorless liquid with a mild ethereal odor, and it is fully miscible with water and with most organic solvents. Acetonitrile belongs to the nitrile family, and its combination of high polarity, moderate boiling point, and excellent dissolving power makes it a staple solvent in laboratories and production plants around the world.
Why Is High Purity Acetonitrile So Widely Used?
The value of acetonitrile comes from its behavior as a polar aprotic solvent. It dissolves a broad range of organic and inorganic compounds, it is stable under normal reaction conditions, and it leaves very little residue when distilled. In pharmaceutical manufacturing, acetonitrile serves as a reaction medium and as a crystallization solvent for active pharmaceutical ingredients. In analytical laboratories, HPLC grade acetonitrile is the standard mobile phase component for chromatographic separations. The agrochemical industry also uses acetonitrile as a solvent in the synthesis of crop protection products, and battery and electronics producers rely on it for electrolyte preparation and precision cleaning.
What Grades of Acetonitrile Are Available?
Acetonitrile is sold in several purity grades, and the right choice depends on the application. Technical grade material suits general synthesis and industrial processes where trace impurities are acceptable. HPLC grade acetonitrile undergoes additional purification to meet strict UV absorbance and residue specifications required for chromatography. Reagent and pharmaceutical grades offer even tighter impurity profiles for regulated manufacturing. Buyers should request the certificate of analysis for each batch and confirm that parameters such as water content, UV cutoff, and residual metals match the intended use.
What Packaging Options Exist for Bulk Acetonitrile?
Bulk acetonitrile is typically shipped in drums, intermediate bulk containers, and ISO tanks. The correct format depends on order volume, destination, and handling infrastructure. Drums suit smaller orders and are easy to store in warehouses with limited space, while IBC totes reduce handling labor for medium volumes. ISO tank containers offer the most economical option for large shipments and preserve product integrity during ocean transport. All packaging should be clearly labeled, chemically compatible, and sealed to prevent moisture pickup, because water is the most common contaminant in acetonitrile.
How Should Bulk Buyers Qualify an Acetonitrile Supplier?
A dependable supplier should provide consistent batch documentation, including certificates of analysis, material safety data sheets, and packing records. Confirm that the supplier can guarantee the purity grade you specify, maintain stock across your required volumes, and deliver to the ports you use. Ask about lot traceability and change control, because formulation or sourcing changes can alter impurity profiles that matter in pharmaceutical and electronic applications. A short qualification sample followed by in-house testing is a prudent step before committing to large volumes.
Frequently Asked Questions
What is the CAS number of acetonitrile? cetonitrile has CAS number 75-05-8 and the chemical formula CH3CN; it is also known as methyl cyanide and belongs to the nitrile family.
Can acetonitrile be used for HPLC analysis? Yes, HPLC grade acetonitrile is one of the most widely used mobile phase solvents in liquid chromatography, with strict UV absorbance and residue specifications.
Is acetonitrile miscible with water? Yes, acetonitrile is fully miscible with water and with most organic solvents, which is one reason it is such a versatile reaction and extraction medium.
How is bulk acetonitrile packaged? Standard bulk formats are steel drums, IBC totes and ISO tank containers, chosen according to order volume and shipping route, with all packaging sealed to prevent moisture pickup.
What are the main hazards of acetonitrile? cetonitrile is flammable, and metabolism of the compound can release cyanide, so vapour inhalation and skin contact must be strictly controlled during handling and storage.
Why is water content important in acetonitrile? Excess water changes solvent strength and can interfere with reactions and chromatographic performance, so higher purity grades specify low water content and buyers should confirm it on the certificate of analysis.