When sourcing P-Aminophenol (PAP), the price is heavily dictated by purity levels (typically ≥99% or ≥99.5%) and the physical form (crystalline powder vs. granules). For pharmaceutical applications, such as the synthesis of Paracetamol, you must ensure low ash content (<0.1%) and minimal iron content (<10ppm) to prevent discoloration. Always request a Certificate of Analysis (COA) to verify the melting point (186-189°C) and moisture content, as these directly impact the yield in chemical synthesis.