In the realm of specialized organic chemistry, intermediates with unique structural features are indispensable for driving innovation in various industries. 5-Chloro-2,3-difluoropyridine (CAS 89402-43-7), a fluorinated pyridine derivative, exemplifies such a crucial compound. Understanding its comprehensive chemical profile is essential for researchers and manufacturers seeking to leverage its potential in synthesis.

Key Chemical Properties and Specifications
5-Chloro-2,3-difluoropyridine is characterized by its specific molecular structure, with the formula C5H2ClF2N and a molecular weight of approximately 149.53 g/mol. Typical specifications provided by manufacturers include:

• Appearance: Colorless liquid. This visual characteristic is a primary indicator of purity, though specific grades might have slight color variations.
• Assay: ≥99.0% (min). This high purity is critical for applications demanding precise chemical reactions, ensuring minimal interference from impurities.
• Melting Point: Approximately 47-49 °C. While it's a liquid at room temperature, this property is relevant for handling and storage conditions.
• Boiling Point: Around 135-182 °C (values vary slightly across sources). This indicates its volatility and is important for distillation and separation processes.
• Density: Typically around 1.442 g/mL at 25 °C.
• Refractive Index: Approximately 1.4738.

These parameters are vital for quality control and for designing appropriate reaction conditions when using this intermediate.

Synthesis and Applications
The synthesis of 5-Chloro-2,3-difluoropyridine often involves complex fluorination and halogen exchange reactions starting from precursor compounds like 2,3,5-trichloropyridine. The efficiency and yield of these synthetic routes are key considerations for manufacturers aiming to provide the product at competitive prices.

The primary application driving the demand for 5-Chloro-2,3-difluoropyridine is its use as an intermediate in the synthesis of agrochemicals. It is a cornerstone in the production of herbicides such as clodinafop-propargyl, which are essential for modern weed management in agriculture. Beyond this established use, its structure suggests significant potential as a versatile building block in the development of new pharmaceutical agents and other fine chemicals, where the introduction of fluorinated pyridine moieties is desired.

Storage and Handling Recommendations
To maintain the integrity and purity of 5-Chloro-2,3-difluoropyridine, proper storage and handling are essential. It is typically recommended to store the compound in a cool, well-ventilated place, away from direct sunlight, heat, and moisture. Adherence to general chemical handling regulations is always advised. For bulk purchases, understanding the recommended packaging (e.g., drums) and transportation guidelines is important.

For any scientist or procurement manager seeking this valuable intermediate, partnering with a reliable manufacturer that can provide detailed technical data and consistent quality is paramount. Whether for large-scale agrochemical production or cutting-edge pharmaceutical R&D, the precise chemical profile of 5-Chloro-2,3-difluoropyridine makes it an indispensable component.