2-Amino-6-Fluorobenzoic Acid PSD & Flowability for SC Formulations
Particle Size Distribution (D50/D90) Ranges Across Milling Grades for 2-Amino-6-Fluorobenzoic Acid
For procurement managers sourcing 2-amino-6-fluorobenzoic acid (also referred to as 2-fluoro-6-aminobenzoic acid or 6-fluoroanthranilic acid) as an agrochemical precursor for fluorinated benzamide fungicides, particle size distribution (PSD) is a critical quality attribute. NINGBO INNO PHARMCHEM CO.,LTD. offers this aromatic carboxylic acid in multiple milling grades, each tailored to specific formulation requirements. The D50 and D90 values—indicating the median particle size and the size below which 90% of particles fall—directly influence dispersion kinetics and suspension stability. Typical industrial grades range from a coarse crystalline powder (D50 ~150–250 µm, D90 ~400–600 µm) suitable for dry blending, to a micronized grade (D50 ~10–30 µm, D90 ~50–80 µm) optimized for suspension concentrates (SC). A jet-milled variant can achieve D50 <5 µm for specialized high-shear applications. These ranges are not fixed specifications; please refer to the batch-specific COA for exact values. As a drop-in replacement for other suppliers, our product matches the technical parameters of leading brands while offering cost-efficiency and reliable supply chain continuity.
Understanding the synthesis route is key: 2-amino-6-fluorobenzoic acid is typically produced via nitration and reduction of 2-fluorobenzoic acid, followed by amination. The crystallization and milling steps determine the final PSD. Our manufacturing process includes controlled cooling and wet milling under inert conditions to minimize amorphous content and ensure batch-to-batch consistency. For researchers exploring kinase inhibitor synthesis, our related article on 2-amino-6-fluorobenzoic acid in benzimidazole kinase inhibitor synthesis provides deeper insights into purity requirements for pharmaceutical intermediates.
Impact of PSD on High-Shear Mixing Efficiency in Suspension Concentrate Formulations
In suspension concentrate (SC) formulations for fluorinated benzamide fungicides, the PSD of the active ingredient precursor directly affects high-shear mixing efficiency. A finer D90 reduces the energy input required to achieve a homogeneous dispersion, but excessively fine particles can lead to Ostwald ripening and viscosity buildup. Our field experience shows that a D90 of 50–80 µm (micronized grade) strikes an optimal balance for most SC systems, providing rapid wetting and stable suspension without excessive thickener demand. When using 2-amino-6-fluorobenzoate as a building block, the particle morphology—whether plate-like or equant—also influences rheology. Our micronized grade is engineered with a narrow span (D90-D10)/D50 to minimize fines and oversize, ensuring predictable behavior in high-shear rotor-stator mixers.
For procurement managers evaluating 2-amino-6-fluorobenzoic acid for fluorinated benzamide fungicides: PSD & flowability metrics, it's essential to consider the entire formulation process. Coarse grades may require pre-milling or extended mixing times, increasing production costs. Our technical team can provide guidance on selecting the appropriate grade based on your existing equipment and formulation recipe. Additionally, color consistency is vital for quality control; our article on sourcing 2-amino-6-fluorobenzoic acid: mitigating color shifts in quinolone API crystallization addresses how trace impurities can affect appearance, a concern also relevant for agrochemical intermediates.
COA Data Tables: Bulk Density Variations and Trace Hygroscopic Uptake in Automated Dosing
Automated dosing systems in agrochemical plants rely on consistent bulk density and flowability. The table below compares typical bulk density ranges and hygroscopicity data for our standard milling grades of 2-amino-6-fluorobenzoic acid. These values are derived from historical batch data and are indicative; actual figures are provided on each COA.
| Milling Grade | Typical D50 (µm) | Bulk Density (g/mL) | Tapped Density (g/mL) | Hygroscopic Uptake (% wt gain at 80% RH, 24h) |
|---|---|---|---|---|
| Coarse Crystalline | 150–250 | 0.55–0.70 | 0.75–0.90 | <0.2 |
| Micronized | 10–30 | 0.30–0.45 | 0.50–0.65 | <0.5 |
| Jet-Milled | <5 | 0.15–0.25 | 0.30–0.45 | <1.0 |
Bulk density variations are critical for volumetric feeders; a deviation of ±10% can cause dosing inaccuracies. Our coarse grade exhibits excellent flowability with a Hausner ratio typically below 1.25, while micronized grades may require flow aids or vibration-assisted hoppers. Hygroscopic uptake is minimal due to the hydrophobic nature of the fluorinated aromatic ring, but prolonged exposure to high humidity can lead to clumping in fine powders. We recommend storing in sealed, moisture-barrier packaging until use. As a factory supply specialist, NINGBO INNO PHARMCHEM offers custom synthesis and packaging options to meet specific industrial purity and handling requirements.
Bulk Packaging and Logistics: IBC and 210L Drum Specifications for Agrochemical Supply Chains
For bulk procurement, we supply 2-amino-6-fluorobenzoic acid in intermediate bulk containers (IBCs) and 210L drums, designed for safe and efficient handling in agrochemical supply chains. IBCs are available in 500 kg or 1000 kg net weight, constructed from HDPE with a pallet base, suitable for automated dispensing systems. 210L steel or HDPE drums typically hold 100–150 kg, depending on bulk density. All packaging complies with UN recommendations for the transport of dangerous goods, though this product is not classified as hazardous for transport. We apply tamper-evident seals and batch-specific labeling for traceability.
Logistics considerations include moisture protection and temperature stability. While 2-amino-6-fluorobenzoic acid is stable under ambient conditions, we recommend avoiding prolonged exposure to temperatures above 40°C to prevent caking. Our global logistics network ensures timely delivery from our manufacturing facility, with full documentation including COA, SDS, and commercial invoice. For procurement managers seeking a reliable alternative to existing suppliers, our drop-in replacement strategy guarantees identical performance without supply disruptions.
Field-Reported Non-Standard Parameters: Viscosity Shifts and Crystallization Behavior in Fluorinated Benzamide Synthesis
Beyond standard specifications, field experience reveals non-standard parameters that can impact downstream processing. One such behavior is the viscosity shift observed when 2-amino-6-fluorobenzoic acid is used in fluorinated benzamide synthesis under sub-zero conditions. In certain solvent systems (e.g., THF or DMF), the reaction mixture may exhibit a sudden increase in viscosity at temperatures below -10°C, potentially due to the formation of a gel-like intermediate complex. This can affect mixing and heat transfer in jacketed reactors. Our technical team recommends pre-cooling the solvent and adding the acid slowly to mitigate this effect.
Another edge case involves crystallization handling. When isolating the final benzamide product, trace impurities from the 2-amino-6-fluorobenzoic acid—specifically residual 2,6-difluorobenzoic acid or unreacted starting material—can act as crystallization inhibitors, leading to oiling out or poor crystal morphology. Our manufacturing process includes rigorous purification steps to minimize these impurities, typically below 0.5% as confirmed by HPLC. For custom synthesis projects, we can tailor the impurity profile to match your process requirements. These insights underscore the importance of partnering with a manufacturer that understands the nuances of fluorinated benzoic acid chemistry.
Frequently Asked Questions
What is the optimal D90 cutoff for ensuring long-term stability in suspension concentrate formulations?
For most SC formulations, a D90 of 50–80 µm provides a good balance between dispersion stability and ease of milling. Finer D90 values (<30 µm) can improve short-term stability but may increase the risk of Ostwald ripening over time. We recommend conducting accelerated stability tests with your specific formulation to determine the ideal PSD.
How do bulk density tolerances affect automated weigh stations, and what specifications should I request?
Bulk density variations directly impact volumetric dosing accuracy. For automated weigh stations, we recommend specifying a bulk density tolerance of ±0.05 g/mL for coarse grades and ±0.03 g/mL for micronized grades. Our COA includes both bulk and tapped density, and we can provide flowability indices upon request.
How do different milling processes (e.g., jet milling vs. pin milling) affect downstream suspension viscosity?
Jet milling typically produces particles with smoother surfaces and a narrower PSD, which can reduce inter-particle friction and lower suspension viscosity compared to pin-milled material. However, jet-milled powders may have higher electrostatic charge, affecting flow. Our micronized grade uses a controlled pin-milling process optimized for low viscosity buildup.
Can 2-amino-6-fluorobenzoic acid absorb moisture during storage, and how does this impact flowability?
While the compound is relatively hydrophobic, fine powders can adsorb surface moisture at high humidity, leading to caking and reduced flow. We package under nitrogen and recommend resealing containers promptly. If clumping occurs, gentle sieving or conditioning at 40°C can restore flowability.
Is this product suitable as a direct replacement for other suppliers' 2-amino-6-fluorobenzoic acid in existing formulations?
Yes, our product is designed as a drop-in replacement, matching the chemical purity and physical properties of leading brands. We recommend a small-scale trial to confirm compatibility with your specific process, but no reformulation is typically required.
Sourcing and Technical Support
NINGBO INNO PHARMCHEM CO.,LTD. is a global manufacturer of high-purity 2-amino-6-fluorobenzoic acid, serving the agrochemical and pharmaceutical industries. Our product is available in multiple milling grades, with comprehensive documentation and reliable bulk supply. For more details, visit our product page: 2-amino-6-fluorobenzoic acid high-purity synthesis intermediate. To request a batch-specific COA, SDS, or secure a bulk pricing quote, please contact our technical sales team.