For professionals in the chemical and pharmaceutical industries, understanding the precise specifications of raw materials and intermediates is non-negotiable. 3,5-Dihydroxybenzoic Acid (CAS 99-10-5) is no exception. Whether you are a procurement manager sourcing for large-scale production or a research scientist in an R&D lab, ensuring the quality and consistency of this compound is paramount. This article outlines the critical specifications to look for when purchasing 3,5-Dihydroxybenzoic Acid, emphasizing the standards set by reliable manufacturers and suppliers.

The most crucial specification for 3,5-Dihydroxybenzoic Acid is its purity. Typically, pharmaceutical-grade intermediates are expected to have a high purity level, commonly stated as ≥99% as determined by High-Performance Liquid Chromatography (HPLC). This analytical method provides a quantitative assessment of the compound's purity and identifies any potential impurities. High purity is vital because impurities can interfere with chemical reactions, reduce yields, or introduce unwanted byproducts into the final product, which is particularly concerning in pharmaceutical manufacturing where safety and efficacy are paramount.

Beyond purity, other chemical properties of 3,5-Dihydroxybenzoic Acid are also important. These include its molecular formula (C7H6O4) and molecular weight (154.12 g/mol), which are essential for stoichiometric calculations in synthesis. The melting point, typically around 236-238 °C (with decomposition), is another indicator of the compound's identity and purity. Manufacturers should also provide information on its appearance, which is usually a colorless solid. Storage conditions are also a key specification; for 3,5-Dihydroxybenzoic Acid, storing it below +30°C is generally recommended to maintain its stability and integrity over time.

When you engage with a supplier to buy 3,5-Dihydroxybenzoic Acid, always request a Certificate of Analysis (CoA). This document details the actual test results for a specific batch of the product, confirming that it meets the stated specifications. Reputable manufacturers will readily provide CoAs and will also be transparent about their quality control procedures. For those looking to source this intermediate from China, seeking manufacturers with ISO certifications or other relevant quality accreditations can provide additional assurance. By focusing on these critical specifications, procurement professionals can confidently select suppliers and ensure the consistent quality of 3,5-Dihydroxybenzoic Acid for their manufacturing and R&D needs.