In the chemical industry, precise specifications are the bedrock of successful manufacturing and product development. For 2-(phenylsulfonyl)aniline (CAS 4273-98-7), a critical intermediate used primarily in dye synthesis, understanding its detailed specifications is paramount for procurement managers, R&D scientists, and formulation chemists. These parameters not only dictate the suitability of the compound for specific applications but also influence pricing and supplier selection.

The physical form of 2-(phenylsulfonyl)aniline is typically described as an off-white to tan crystalline powder. This appearance is a primary visual indicator, but the truly critical parameters lie within its chemical analysis. The assay, often determined by titration, is a key performance indicator. For industrial applications, an assay of ≥98.0% is commonly sought, ensuring a high concentration of the active compound. When you are looking to buy 2-(phenylsulfonyl)aniline, verifying this assay is a fundamental step.

Beyond the main compound's purity, understanding the levels of potential impurities is equally important. The presence of substances like Aniline (often specified as ≤0.5%), OCA (≤1.0%), and 2-Nitro Diphenyl Sulfone (≤0.5%) can significantly impact the efficiency and outcome of downstream reactions, especially in the sensitive synthesis of acid dyes like Acid Yellow 246 or Acid Red 42. Additionally, residual solvents such as Methanol and 1-Butanol, and insoluble matter (all typically kept at very low percentages), are also critical parameters that manufacturers must control.

Other physico-chemical properties also play a role. While not always included in basic specifications, data like melting point (120-122 °C), boiling point (around 439.6 °C), and density (around 1.3 g/cm³) provide valuable context for handling, storage, and reaction design. For R&D scientists, these properties can inform process optimization and troubleshooting.

When sourcing 2-(phenylsulfonyl)aniline, it is crucial to partner with suppliers who provide comprehensive specifications and can consistently meet these quality benchmarks. For procurement managers, comparing quotes from various manufacturers, especially those based in China, involves not just the price per kilogram but also a thorough review of the product's technical specifications. Ensuring that the supplied material aligns with your required purity and impurity profile is key to avoiding costly production issues and ensuring the quality of your final products. If you are seeking to purchase these specific dye intermediates, always request a detailed specification sheet.