In the realm of chemical procurement, particularly for pharmaceutical and agrochemical intermediates, adherence to strict specifications is non-negotiable. 4-(Methylsulfonyl)phenylacetic Acid (CAS No.: 90536-66-6) is no exception. Understanding these critical specifications ensures that the material procured meets the exact demands of its intended application, safeguarding product quality and research integrity.

The primary specification for 4-(Methylsulfonyl)phenylacetic Acid is its purity, often expressed as an assay percentage. The provided information indicates an assay of ≥96.0%. For many advanced synthesis applications, especially in the pharmaceutical sector where it serves as an intermediate for Etoricoxib, even higher purities may be sought. Reputable manufacturers strive to meet or exceed these purity standards, offering CoA to verify these claims. Buyers should always confirm the specific assay required for their process.

The physical appearance is another key specification. 4-(Methylsulfonyl)phenylacetic Acid is typically described as a white to light yellow crystalline powder. Variations in color or form can sometimes indicate impurities or degradation. A consistent, clean appearance is a good preliminary indicator of quality, but it must be corroborated by analytical data.

Packaging is also a crucial specification, especially for bulk purchases. Standard packaging often includes 25 kg drums, suitable for industrial quantities. However, suppliers may also offer smaller pack sizes for R&D purposes or accommodate specific customer requirements. The packaging must ensure product integrity during transit and storage, protecting it from moisture and contamination. When you buy from a trusted supplier, you can expect appropriate and secure packaging.

Other important specifications may include: Melting Point (typically 136-140 °C), which serves as a verification of identity and purity; Solubility data, indicating its behavior in common solvents like DMSO or methanol; and CAS Number (90536-66-6) for unambiguous identification. For users seeking to buy this compound, it is essential to request a detailed specification sheet from the manufacturer.

When sourcing from manufacturers in China, it is vital to partner with those who can clearly articulate and consistently meet these specifications. A transparent supplier will readily provide necessary documentation and answer queries regarding product quality and compliance. By prioritizing adherence to these specifications, researchers and procurement professionals can ensure they are acquiring a reliable and effective intermediate for their critical synthesis needs.