2-Ethylaniline for Disperse Dye Coupling: Bulk Supply & Specs
Technical Specifications and Purity Grades of 2-Ethylaniline for Disperse Dye Coupling
In disperse dye manufacturing, the performance of 2-ethylaniline—also referred to as o-aminoethylbenzene or 2-ethylbenzenamine—directly influences coupling efficiency and final color yield. Industrial users typically evaluate this aromatic amine based on purity, isomer content, and moisture levels. Standard commercial grades range from 98.5% to 99.5% purity, with the higher tier reserved for sensitive azo coupling reactions where trace impurities can shift shade or reduce fastness properties.
Our product, supplied by NINGBO INNO PHARMCHEM CO.,LTD., is positioned as a drop-in replacement for major Western brands. It matches the key specifications of Sigma-Aldrich E11803, as detailed in our drop-in replacement analysis. For German-speaking procurement teams, we also provide a detailed comparison in German. The following table outlines typical specifications for dye-grade 2-ethylaniline:
| Parameter | Industrial Grade | High-Purity Grade |
|---|---|---|
| Assay (GC) | ≥ 98.5% | ≥ 99.5% |
| Moisture (KF) | ≤ 0.3% | ≤ 0.1% |
| Color (APHA) | ≤ 200 | ≤ 100 |
| Isomer Content (3-ethylaniline) | ≤ 0.5% | ≤ 0.2% |
| Appearance | Pale yellow to brown liquid | Clear, colorless to pale yellow liquid |
For disperse dye coupling, the high-purity grade is strongly recommended. Even minor amounts of the meta-isomer can alter the hue of the final dye, a problem often encountered when sourcing from less specialized suppliers. Our manufacturing process, which involves catalytic hydrogenation of o-nitroethylbenzene, is tightly controlled to minimize such byproducts.
Critical COA Parameters and Batch-to-Batch Consistency in Industrial Synthesis
Procurement managers and quality control teams rely on the Certificate of Analysis (COA) to validate each shipment. Beyond the standard assay, experienced chemical engineers scrutinize parameters that are not always listed on generic datasheets. For 2-ethylaniline, the refractive index (n20/D) typically falls between 1.558 and 1.560, and density (20°C) is around 0.983 g/mL. Deviations can indicate contamination or incomplete reaction.
One field-observed nuance is the presence of trace N-ethylated impurities, which can form during synthesis if reaction conditions drift. These impurities, though often below 0.1%, can act as chain terminators in certain dye syntheses, leading to lower molecular weight products and weaker tinctorial strength. Our COA includes a dedicated GC peak for N-ethyl-2-ethylaniline, a parameter rarely disclosed by other suppliers. Please refer to the batch-specific COA for exact values, as these can vary slightly depending on production campaign.
Batch-to-batch consistency is maintained through rigorous in-process controls. We monitor the hydrogenation endpoint via online GC, ensuring that residual nitro content is below 50 ppm before distillation. This level of detail is critical for dye manufacturers running continuous processes where feedstock variability can cause costly downtime.
Non-Standard Behavior: Viscosity, Crystallization, and Handling at Sub-Zero Temperatures
While 2-ethylaniline is a liquid at room temperature, its behavior at low temperatures is a practical concern for facilities in cold climates or unheated warehouses. The freezing point is approximately -15°C, but we have observed that the liquid can become significantly more viscous below 0°C, making pumping and transfer challenging. At -10°C, the viscosity can increase to over 10 cP, compared to about 3 cP at 25°C. This non-linear viscosity shift is not always captured in standard literature but is well-known among field engineers.
Another edge case involves crystallization during prolonged storage at temperatures near the freezing point. If the material is stored in IBC totes without agitation, crystal nuclei can form on container walls, leading to a slush-like consistency. This does not affect chemical quality but requires gentle warming to 30-40°C and recirculation before use. We recommend insulated or trace-heated storage for customers in regions with harsh winters. Our logistics team can advise on packaging configurations that mitigate these issues, such as using 210L drums with integrated heating jackets.
Bulk Packaging, Storage, and Supply Chain Reliability for Large-Scale Operations
For industrial-scale dye production, packaging and logistics are as important as chemical specifications. We supply 2-ethylaniline in standard 210L steel drums (net weight 200 kg) and 1000L IBC totes (net weight 900 kg). Both options are UN-approved for hazardous goods. The material is classified as a combustible liquid (flash point ~85°C) and requires storage in a cool, well-ventilated area away from ignition sources.
Our supply chain is designed for reliability. With production capacity exceeding 2000 metric tons per year, we maintain safety stock at multiple regional warehouses. This allows us to offer lead times as short as 2 weeks for regular orders. For new customers, we provide samples and a sample COA upon request. The 2-ethylaniline product page contains current pricing and availability. We understand that in the dye industry, production schedules are tight, and a delayed shipment of a key intermediate can halt an entire campaign. That's why we prioritize transparent communication and proactive logistics management.
Frequently Asked Questions
What is the minimum order quantity (MOQ) for 2-ethylaniline?
Our standard MOQ is one 210L drum (200 kg net) for trial orders. For ongoing supply, we typically ship in full truckloads (20 IBC totes or 80 drums) to optimize freight costs. Smaller quantities can be arranged for R&D purposes.
What is the typical lead time for bulk orders?
For orders up to 10 metric tons, lead time is usually 2-3 weeks from order confirmation, subject to stock availability. Larger volumes may require 4-6 weeks, depending on production scheduling. We always confirm the exact delivery date before order acceptance.
Can you provide a sample for evaluation?
Yes, we offer free samples of 500 mL for qualified industrial buyers. The sample will be accompanied by a representative COA. Shipping costs are typically borne by the requester.
How should 2-ethylaniline be stored to maintain quality?
Store in a tightly sealed container in a cool, dry, and well-ventilated area. Recommended storage temperature is 15-25°C. Avoid exposure to direct sunlight and moisture. Under these conditions, the product is stable for at least 12 months from the date of manufacture.
What is the price of 2-ethylaniline?
Pricing is volume-dependent and subject to market fluctuations in raw materials. Please contact our sales team with your anticipated annual volume and desired purity grade for a competitive quotation. We offer flexible payment terms for established customers.
Sourcing and Technical Support
Selecting a reliable source for 2-ethylaniline is a strategic decision that impacts product quality, production efficiency, and ultimately, market competitiveness. As a dedicated manufacturer of fine chemical intermediates, NINGBO INNO PHARMCHEM CO.,LTD. combines technical expertise with robust logistics to serve the global dye industry. Our team includes chemists who understand the nuances of azo coupling and can assist with troubleshooting or process optimization. We invite you to review our comprehensive specifications and discuss how our ortho-ethylaniline can meet your specific requirements. Ready to optimize your supply chain? Reach out to our logistics team today for comprehensive specifications and tonnage availability.