4-Hydroxybenzoic acid

This 4‑Hydroxybenzoic Acid analytical standard is a secondary standard metrologically traceable to a recognized pharmacopoeial primary standard and characterized in accordance with applicable monograph methods. It is produced under rigorous quality controls and supplied with comprehensive certification to support confident, defensible analytical results.

The material is fit for purpose across a broad range of qualitative and quantitative applications, including pharmaceutical release testing, method development and validation, and calibration workflows. It is particularly well suited for use as an impurity reference standard in the determination and quantification of Aspirin and Salicylic Acid in active pharmaceutical ingredients and finished drug products by chromatographic techniques such as high‑performance liquid chromatography (HPLC).

As a certified reference material, this product delivers the accuracy, traceability, and consistency required for regulated environments, including pharmaceutical quality control, impurity profiling, and other analytical laboratories requiring reliable calibration and verification standards.