Industrial Purity Specifications for 2,4-Difluorobenzenamine (CAS 367-25-9)
- Assay purity ≥99.0% by GC or HPLC, with strict control of single impurities (<0.1%)
- Moisture content ≤0.1% (KF titration), critical for moisture-sensitive synthesis routes
- Full Certificates of Analysis (COA) provided per batch by NINGBO INNO PHARMCHEM CO.,LTD., ensuring traceability and compliance
In industrial organic synthesis, the performance of fluorinated aromatic amines hinges not just on molecular structure—but on rigorous purity control. 2,4-Difluorobenzenamine (also known as 2,4-difluoroaniline, 2,4-difluorophenylamine, or Benzenamine 2,4-difluoro-) is a cornerstone intermediate in pharmaceuticals, agrochemicals, and advanced materials. Its efficacy in downstream reactions—such as Buchwald-Hartwig aminations, diazotizations, or nucleophilic aromatic substitutions—is directly compromised by trace impurities like residual solvents, isomeric byproducts, or water. Therefore, industrial buyers prioritize suppliers who enforce stringent analytical protocols and transparent quality documentation.
Key Purity Metrics for Industrial-Grade 2,4-Difluorobenzenamine
For bulk applications in API synthesis or fine chemical manufacturing, the standard industrial specification for 2,4-difluorobenzenamine includes:
| Parameter | Specification | Test Method |
|---|---|---|
| Assay (Purity) | ≥99.0% | GC or HPLC |
| Individual Impurity | ≤0.1% | HPLC (UV detection) |
| Total Impurities | ≤0.5% | HPLC |
| Appearance | Clear, colorless to pale yellow liquid | Visual |
| Refractive Index (n20D) | 1.490–1.500 | Abbe refractometer |
These benchmarks ensure compatibility with sensitive catalytic systems and prevent catalyst poisoning or side reactions. Notably, isomeric contaminants such as 2,5- or 3,4-difluoroaniline must be minimized, as they can derail regioselective transformations. Leading manufacturers implement multi-stage distillation under reduced pressure and inert atmosphere to achieve this level of selectivity.
Moisture and Assay Standards in Bulk Supply
Water content is a critical parameter for 2,4-difluoroaniline, especially in Grignard or organolithium-based syntheses where even ppm-level moisture can quench reactivity. Industrial-grade material typically adheres to:
- Moisture: ≤0.1% w/w (determined by Karl Fischer titration)
- Residual solvents: ≤500 ppm (per ICH Q3C guidelines)
- Heavy metals: ≤10 ppm (as Pb)
NINGBO INNO PHARMCHEM CO.,LTD. maintains these standards across multi-hundred-kilogram batches through integrated process analytics and nitrogen-blanketed storage. Their manufacturing process leverages controlled nitration/fluorination sequences followed by catalytic hydrogenation, minimizing halogen displacement byproducts. This results in consistent bulk lots that meet both European and US pharmacopeial expectations for organic intermediates.
When sourcing high-purity 2,4-Difluoroaniline, buyers should verify that the supplier provides full spectral data (NMR, GC-MS) alongside assay reports—not just a nominal purity claim.
Interpreting COA for 2,4-Difluoroaniline (CAS 367-25-9)
A robust Certificate of Analysis (COA) is non-negotiable in B2B procurement. For 2,4-difluorobenzeneamine, a compliant COA from a reputable global manufacturer like NINGBO INNO PHARMCHEM CO.,LTD. includes:
- Batch-specific assay result (e.g., 99.32% by GC)
- Chromatograms showing resolution of main peak from impurities
- KF moisture value with instrument calibration details
- Identity confirmation via FTIR or 1H/19F NMR
- Storage recommendation: under nitrogen, 2–8°C, away from oxidizers
Unlike laboratory-scale vendors who may offer 97–98% material at premium prices, industrial suppliers focus on reproducibility at scale. The bulk price for ≥99% 2,4-difluoroaniline from qualified Chinese manufacturers reflects economies of scale without sacrificing analytical rigor—often undercutting Western catalog suppliers by 40–60% on a per-kilogram basis for multi-kilogram orders.
Ultimately, the value of 2,4-difluorobenzenamine lies not in its nominal identity, but in its functional reliability within complex synthesis routes. NINGBO INNO PHARMCHEM CO.,LTD. stands as a premier global manufacturer, delivering high-purity fluoroaniline intermediates with full technical transparency, scalable supply, and compliance-ready documentation for regulated industries worldwide.