HPLC-grade Acetonitrile is one of the most widely used high-purity solvents in analytical chemistry, pharmaceuticals, environmental testing, and food safety.
Its exceptional purity, low UV absorbance, and reliable performance make it essential for laboratories that require accurate, reproducible results.
But what exactly qualifies as “HPLC-grade,” and why does this level of purity matter for testing workflows?
In this guide, we’re going to break down what HPLC-grade acetonitrile is, how it supports high-precision chromatography, the key the benefits it offers across multiple industries, and how to choose the right grade of acetonitrile for your applications.
Ready to shop for Acetonitrile now? Shop Acetonitrile in 4×1 Gallon Glass Bottles, 5 Gallon Pails & 55 Gallon Drums in the Ecolink online store!
What Is Acetonitrile HPLC-Grade?
Acetonitrile is a liquid solvent widely used in laboratories to dissolve, extract, and analyze chemicals with high precision. Here are some of acetonitrile’s properties:
- Colorless
- Volatile
- Highly soluble
- Low viscosity
- Chemically stable
But what is “HPLC” grade acetonitrile?
First, let’s look break down the acronym:
HPLC stands for “High-Performance Liquid Chromatography,” a specific lab technique that is used to separate, identify, and measure the individual ingredients in a mixture, no matter how tiny the amounts are.
So, when chemicals are considered “HPLC-grade,” it means that they are of the highest purity and standard and won’t interfere with highly sensitive measurements performed in a HPLC test.
Therefore, Acetonitrile HPLC-grade means that an acetonitrile liquid solvent is extremely pure, and optimal for use in laboratories where HPLC tests are performed. Here are some examples:
- Pharmaceuticals: to identify and quantify drugs and impurities
- Food science: to detect additives, contaminants, or nutrients
- Environmental monitoring: to analyze pollutants in water and soil
- Forensics: to detect drugs, toxins, or chemicals in evidence samples
Technical Specifications of Acetonitrile (HPLC-Grade)
To help you evaluate the suitability of this solvent for your application, read through the essential technical specifications for HPLC?grade acetonitrile:
| Property | Typical Specification |
| Chemical Formula | C2H3N |
| Purity (Assay) | greater than or equal to 99.93% (HPLC grade) |
| UV Absorbance Limits | 0.01 max @ 254 nm; 0.02 max @ 220 nm; 0.04 max @ 210 nm; 0.07 max @ 200 nm |
| Boiling Point | 81°C |
| Melting Point | -46°C |
| Flash Point | ~12.8°C (55°F) |
| Viscosity | 0.36 cP at 20°C |
| Vapor Pressure | 72.8 mmHg at 20°C |
| UV Cutoff / Absorbance Performance | less than or equal to 0.005 mAU @ 25 (varies) |
| Miscibility | Completely miscible with water |
| Density | 0.786 g/mL at 25°C |
| Autoignition Temperature | ~973°F |
| Typical Packaging Sizes | 4×1 Gallon, 5 Gallon and 55 Gallon |
| Physical Appearance | Colorless liquid |
| Common Analytical Uses | HPLC, LC–MS, gradient analysis, analytical separations |
Importance of HPLC in Analytical Chemistry
HPLC testing is important because it helps scientists see what’s inside a mixture, even when the ingredients are tiny, similar, or hidden. It gives clear, reliable answers—something essential for medicine, safety, research, and environmental protection.
The key is to have a trusted chemical supplier in your corner that can provide you with quality solvents for your application.
Differences Between HPLC-Grade and Other Grades
Most solvents, including acetonitrile, are sold in different purity grades.
So, what sets HPLC-grade solvents apart from other grades?
The solvent’s high-purity level.
To see how this grade measures up to other common solvent grades, read through the chart below:
| Grade | Purity Level | UV Absorbance | Suitable for HPLC? | Typical Use |
| HPLC Grade | Very high | Very low | Yes | Analytical separations, LC-MS |
| Gradient Grade | Ultra-high | Extremely low | Yes (best for gradients) | Advanced HPLC work |
| Analytical Grade | Medium-high | Higher (not controlled) | No | Routine lab analysis |
| Technical/Industrial Grade | Medium–low | Not controlled | No | Manufacturing, extraction |
| Pharmaceutical (USP/EP) Grade | Very high, pharmacopeia-verified | Controlled | Sometimes (depends on specs) | Drug synthesis & QC |
| Preparative Grade | Medium–high | Not optimized for UV | Generally no | Bulk purification |
Let’s take a closer look at some specific benefits of acetonitrile.
4 Benefits of Using Acetonitrile HPLC-Grade
HPLC-grade acetonitrile offers the high purity, low UV absorbance, and chemical consistency required for accurate, reproducible analytical results. Below we’ve outlined four key advantages that make this solvent essential for high-precision laboratory work.
Benefit #1: Meets High Purity Requirements
HPLC-grade acetonitrile undergoes strict purification to remove impurities, particulates, and other chemical contaminants that could potentially interfere with an HPLC or another lab test.
This chemical is tightly controlled and highly batch-tested, providing reliability for many applications in industries where precision is non-negotiable, such as pharmaceuticals.
Benefit #2: Improves Reproducibility in Results
Low impurity levels ensure clean, stable baselines, helping to prevent peak distortions that could undermine accuracy. With high-purity solvents, the solvent composition becomes consistent and can lead to repeatable results.
Benefit #3: Enables Fast, Efficient Analysis
Additionally, the reduction in contamination can help ensure long-term system performance, which can have a direct impact on production resources, time, and overall cost.
Benefit #4: Highly Soluble & Miscible for Increased Precision
Acetonitrile is highly soluble, and mixes perfectly with water. It is also highly miscible, meaning it can dissolve a wide variety of chemicals.
Since it can blend and dissolve so many substances, it’s easier to create precise mixtures, which makes it essential for industries where prevision matters most—medicine, safety, and even environmental protection.
Now, let’s take a deep dive into popular applications for this solvent.
Applications of High-Purity Acetonitrile HPLC Grade
Many labs purchase acetonitrile HPLC grade in 4L packaging for use various applications.The three most popular applications occur in pharmaceuticals, environmental, and the food and beverage industries.
Use in Pharmaceutical Analysis
The pharmaceutical industry is the largest consumer of acetonitrile in the world.
This chemical is essential in API synthesis, drug formulation, and quality control processes. Here’s only some of the reasons why HPLC-grade acetonitrile is critical for pharmaceutical applications:
- Identify impurities, helping to keep the drug stays safe
- Ensure consistency in every batch
- Helps companies meet strict safety and regulatory rules
As drug development and manufacturing grow, so does the increase in demand for this solvent.
Environmental Testing Applications
When it comes to keeping our environment safe, acetonitrile HPLC grade plays a key role in helping laboratories detect pollutants and track long-term changes in nature:
- Check water for pollution
- Test soil for harmful chemicals
- Help confirm regulatory compliance
- Support long-term research
Food and Beverage Testing
The food and beverage industry also uses this solvent to…
- Check for unwanted chemicals in food
- Measure nutrients and ingredients
- Ensure product consistency and safety
- Support regulatory testing requirements
While this isn’t a complete list of all the applications for this solvent, it should help you see why this solvent is so important!
Safety & Handling Guidelines
HPLC-grade acetonitrile is widely used in analytical laboratories, but like all high-purity organic solvents, it must be handled with strict safety protocols. Below is a comprehensive safety and regulatory overview appropriate for an authoritative supplier such as Ecolink.
Key Hazards
- Flammable liquid and vapor—keep away from heat, sparks, and open flames.
- Can irritate eyes, skin, and respiratory system; may affect the central nervous system with prolonged exposure.
- Classified under acute toxicity categories for oral, dermal, and inhalation exposure.
Safe Handling & PPE
- Use only in a fume hood with adequate ventilation.
- Wear chemical-resistant gloves, goggles, lab coat, and use ABEK-type respirator filters when needed.
- Keep containers tightly closed to reduce vapor buildup.
Storage
- Store in a cool, dry, well-ventilated area away from ignition sources.
- Compatible packaging includes amber bottles such as Fisher’s Safe-Cote™ containers.
First Aid Basics
- Rinse eyes or skin immediately with water for 15 minutes; seek medical attention.
- Move exposed individuals to fresh air if vapors are inhaled.
Regulatory Considerations
- Must align with OSHA Hazard Communication rules (SDS, labeling, training).
- FDA-regulated labs (food and pharma) must follow solvent safety and purity guidelines for analytical testing.
- ACS and similar standards help ensure solvent quality consistency for regulated workflows.
How to Choose the Right Acetonitrile Grade
Choosing the correct acetonitrile grade is essential for achieving accurate, reliable analytical results. Different grades are formulated to meet the purity, absorbance, and performance requirements of specific laboratory techniques such as HPLC, LC–MS, UV/Vis, and SPE. The table below breaks down the key differences to help you determine which grade best suits your method.
Acetonitrile Grade Comparison
| Grade | Best For | Key Characteristics | Technique Compatibility |
| HPLC Grade | Routine HPLC and general analysis | High purity (99.9%) with low UV absorbance suitable for standard chromatographic separations. | HPLC, UV/Vis, general chromatography |
| Gradient Grade | High-sensitivity gradient methods | Ultra-low impurities and extremely low UV absorbance, providing stable baselines during gradient runs. | Advanced HPLC, UV/Vis, gradient analysis |
| LC/MS Grade | Mass spectrometry workflows | Very low non-volatile residue and minimal background noise, optimized for accurate ion detection. | LC–MS, trace-level analysis, high-resolution MS |
| SPE-Suitable ACN | Sample preparation and cleanup | Anhydrous or low-moisture formulations specifically marked as suitable for solid?phase extraction. | SPE, extraction workflows |
Conclusion: Selecting the Best Grade for Your Application & Next Steps
As we’ve learned, acetonitrile HPLC-grade is essential for producing accurate, repeatable, and high-quality analytical results. This solvent’s high purity, low UV absorbance, and excellent mixing ability make it a top choice for pharmaceutical testing, environmental monitoring, and food & beverage analysis.
However, selecting the right acetonitrile for your application is important. Before you make your purchase, we recommend that you take the following into consideration:
- Purity requirements for your specific analytical method
- Instrument compatibility, especially for HPLC and LC-MS workflows
- Batch-to-batch consistency to support regulatory or validated methods
- Safety, storage, and handling needs within your testing environment
- Reliable sourcing, ensuring product quality, technical support, and steady availability
Need high-purity solvents? Ecolink, Inc. can help!
Choose Ecolink as Your HPLC?Grade Chemical Supplier
At Ecolink, Inc., we provide HPLC-grade Acetonitrile in bulk quantities, tailored for industrial and commercial labs. Our solvents undergo strict quality control and batch-testing procedures aligned with ACS and ISO-level standards, ensuring the consistency required for sensitive analytical methods. You can shop Acetonitrile online with us today!
Our Cost-Effective Bulk Options:
Our chemical specialists help industrial buyers ensure compatibility, compliance, and seamless supply continuity. To receive pricing, availability, or technical documentation, click here to contact our chemical specialists, or reach us at info@ecolink.com or 1-800-563-1305 today!
FAQ
1. What is the CAS number for acetonitrile?
The CAS number for acetonitrile is 75-05-8.
2. What does “HPLC-grade” mean?
HPLC-grade acetonitrile is purified to ensure very low UV absorbance and minimal impurities, making it suitable for high-sensitivity chromatographic analysis.
3. Is acetonitrile miscible with water?
Yes. Acetonitrile is completely miscible with water, which makes it ideal for reversed-phase HPLC and gradient methods.
4. What applications commonly use HPLC-grade acetonitrile?
It is widely used for HPLC, LC-MS, UV/Vis analysis, and sample preparation workflows due to its high purity and low background absorbance.
5. Where can I purchase high-purity acetonitrile?
You can source high-purity, bulk-ready acetonitrile from Ecolink, Inc., which offers stringent quality control, batch consistency, and technical support for regulated analytical environments. Shop online!
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