Oleylamine in Nanoparticle Synthesis: Technical Specs & Quality Control
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- The Multi-Functional Role of Oleylamine in Colloidal Nanoparticle Chemistry
- Deciphering Oleylamine Technical Specifications: Purity and Impurity Profiles
- Quality Control Protocols in Oleylamine Manufacturing and Batch Testing
- Storage, Packaging, and Handling: Preventing Oxidation Caking
- How to Partner with a Verified Oleylamine Direct Supplier
- Request Technical Specs & Commercial Bulk Quotations
- Related News Recommendations
- Our Factory Equipment
- References:
Oleylamine (CAS 112-90-3) serves as a primary surface capping ligand, reducing agent, and high-boiling solvent in advanced nanomaterial manufacturing. Key application sectors include quantum dots, semiconductor nanocrystals, and battery anode materials. Quality grades typically range from Technical Grade (70% and above) to High-Purity Synthesis Grade (80% to 90% and above). Standard export packaging includes 170 kg steel drums, IBC tanks, and customized argon-sealed drums.
In the field of advanced nanomaterial synthesis, Oleylamine (CAS 112-90-3) serves as a cornerstone reagent. Whether you are scaling up the production of colloidal quantum dots, iron oxide nanoparticles, or noble metal nanocrystals, the quality and purity of your Oleylamine directly dictate particle size distribution, crystal morphology, and surface passivation.
For chemical procurement managers and R&D engineers, sourcing Oleylamine in commercial quantities presents unique technical challenges. Minor impurities—such as homologue alkylamines or trace moisture—can derail batch reproducibility. In this technical guide, we break down the critical specification standards, quality control protocols, and supply chain strategies essential for procuring high-performance Oleylamine in bulk.
The Multi-Functional Role of Oleylamine in Colloidal Nanoparticle Chemistry
Understanding why Oleylamine is indispensable in wet-chemical nanomaterial synthesis helps clarify why technical specifications must be tightly controlled during manufacturing. Oleylamine rarely acts as a simple solvent; it executes three distinct chemical functions simultaneously during liquid-phase synthesis:
High-Boiling Solvent System: With a boiling point exceeding 350 degrees Celsius, Oleylamine allows thermal decomposition and solvothermal reactions to proceed at elevated temperatures without thermal degradation of the carrier medium.
Surface Capping and Morphology Control: The long hydrophobic aliphatic tail combined with the terminal primary amine group allows Oleylamine to dynamically bind to inorganic nanoparticle surfaces. This steric hindrance stops particle aggregation and directs anisotropic growth into nanowires, nanorods, and nanocubes.
Mild Reducing Agent: At elevated temperatures above 150 degrees Celsius, Oleylamine donates electrons to reduce transition metal salts to their zero-valent metallic states, initiating controlled nucleation.
Deciphering Oleylamine Technical Specifications: Purity and Impurity Profiles
A common pitfall in bulk chemical sourcing is assuming that all commercial grades of Oleylamine are chemically identical. Commercial-grade Oleylamine is synthesized from natural fatty acid feedstocks and naturally contains a mixture of structurally similar alkylamines.
Key Quality Metrics Comparison
When reviewing a factory Certificate of Analysis (COA) for nanoparticle synthesis applications, focus on these critical thresholds:
| Technical Parameter | Commercial / Technical Grade | High-Purity Synthesis Grade | Impact on Nanoparticle Production |
| Primary Amine Content (Assay) | 70.0% – 80.0% | 80.0% – 90.0%+ (GC) | Low primary amine content alters coordination kinetics and particle size. |
| Water Content (Karl Fischer) | Below 1.0% | Below 0.1% (1000 ppm) | Moisture causes premature hydrolysis of metal precursor salts. |
| Saturated Amine Homologues | 15.0% – 20.0% | Tightly Controlled | Stearylamine and Palmitylamine alter ligand desorption energy. |
| Trans-Isomer Ratio (Elaidylamine) | Variable | Monitored & Minimal | Trans-isomers pack differently on nanocrystal facets, changing shape. |
| Color (APHA / Hazen) | Below 100 (Yellowish) | Below 30 (Clear to Light Straw) | Dark coloration indicates oxidation byproducts that quench luminescence. |
Quality Control Protocols in Oleylamine Manufacturing and Batch Testing
To guarantee batch-to-batch consistency for industrial scale-up, a qualified chemical manufacturer must enforce strict in-process testing and final quality assurance procedures. The synthesis workflow follows a continuous quality control loop, starting from raw material feedstock audits, moving through multi-stage vacuum fractionation and distillation, conducting in-line GC assay checks, and concluding with argon-blanketed export packaging.
Three Essential Laboratory Verification Methods
Gas Chromatography with Flame Ionization Detection (GC-FID): GC analysis must be used to map the complete fatty amine distribution. A reliable COA should explicitly detail the percentages of C18 monounsaturated oleylamine alongside saturated homologues like stearylamine and palmitylamine.
Karl Fischer Coulometric Titration: Moisture is the primary enemy of air-sensitive nanoparticle synthesis. Testing for micro-water content before drum sealing prevents unwanted hydroxylation during customer storage.
Colorimeter and Refractive Index Verification: Monitoring APHA color index verifies that oxidation products (such as imines or amine oxides) have not formed during post-synthesis distillation.
Our export-grade Oleylamine undergoes high-vacuum fractional distillation to lock in narrow isomer distributions and minimal moisture content prior to drum filling.
Storage, Packaging, and Handling: Preventing Oxidation Caking
Oleylamine contains an unsaturated double bond in its aliphatic carbon chain, making it naturally vulnerable to atmospheric oxygen and carbon dioxide. Exposure to air leads to light oxidation, yellowing, and the absorption of ambient carbon dioxide to form carbamate salts.
Recommended Packaging Specifications
Standard commercial packaging utilizes high-density steel drums equipped with an anti-corrosive internal coating, or fluorinated HDPE pails for smaller trials. Inert protection is achieved through argon or high-purity nitrogen gas sparging and headspace blanketing. Common container volumes include 20 kg fluorinated pails, 170 kg steel drums, and bulk ISO tanks.
Best Practices for Facility Storage
Inert Gas Blanketing: Always purge storage vessels with dry Nitrogen or Argon gas after removing partial quantities to prevent oxidation.
Temperature Control: Store between 15°C and 25°C in a cool, dry warehouse away from strong oxidizing agents and organic acids. If solid carbamate crystals form during cold transit, gently warm the drum under a dry nitrogen purge to re-homogenize without introducing moisture.
How to Partner with a Verified Oleylamine Direct Supplier
When selecting a long-term supply partner for Oleylamine (CAS 112-90-3), evaluating chemical capability and export compliance is vital for uninterrupted factory production.
Ask potential suppliers the following auditing questions during pre-qualification:
Can your facility provide Gas Chromatography (GC) spectrum charts alongside the standard Certificate of Analysis?
What is your standard protocol for packaging air-sensitive amines for long-distance ocean freight?
Do you support REACH registration compliance for European market import, as well as full GHS Safety Data Sheets (SDS)?
Are pre-shipment lab samples (100g to 500g) available under inert packaging for internal R&D trial validation?
Partnering with a factory-direct exporter eliminates intermediary markups and gives your engineering team direct access to technical support when fine-tuning raw material parameters.
Request Technical Specs & Commercial Bulk Quotations
Seeking a reliable, high-purity supply of Oleylamine (CAS 112-90-3) for your nanoparticle manufacturing line?
We provide factory-direct supply, tailored distillation grades, complete GC analysis packages, and secure global logistics support.
Request Technical Data & Direct Pricing: Contact our chemical engineering sales team at sales01@sdlookchemical.com.
Request an R&D Testing Sample: Send us your required assay percentage, application details, and destination port for a response within 24 hours.
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References:
• PubChem Compound Summary (NCBI):
Oleylamine (CAS 112-90-3 / CID 5282106). National Center for Biotechnology Information. https://pubchem.ncbi.nlm.nih.gov/
• European Chemicals Agency (ECHA):
Substance Information: (Z)-octadec-9-enylamine (EC No. 204-015-5 / CAS 112-90-3). REACH Registration Dossier. https://echa.europa.eu/
• ACS Nano Journal Research:
The Role of Amine Ligands in Colloidal Quantum Dot Synthesis & Surface Passivation. American Chemical Society Publications.
• Globally Harmonized System of Classification and Labelling of Chemicals (GHS):
Safety Data Sheet Compliance and Transport Classification for Aliphatic Amines.