2,4-Dihydroxybenzoic Acid: A13545.0E Drop-In Replacement
99.3% Assay Grade Purity: Eliminating Trace Fe/Cu Impurities That Catalyze Unwanted Esterification Oxidation
Ningbo Inno Pharmchem Co., Ltd. positions its 2,4-Dihydroxybenzoic Acid (CAS: 89-86-1), also referred to as 4-Carboxyresorcinol or beta-Resorcylic acid, as a direct drop-in replacement for Thermo Fisher A13545.0E. While the reference product specifies 97% purity, our industrial grade delivers a 99.3% assay, providing superior stoichiometric control for downstream synthesis routes. This elevated purity level is critical for applications where trace impurities can act as catalysts for unwanted side reactions. Specifically, trace iron (Fe) and copper (Cu) residues can catalyze unwanted esterification oxidation during high-temperature processing, leading to yield loss and byproduct formation. Our manufacturing process ensures these transition metals are minimized, stabilizing the reaction profile. The 2.3% difference in assay may appear marginal, but in multi-step synthesis routes, this variance accumulates. Impurities in lower assay grades can include isomers or oxidation products that complicate purification. Our 99.3% grade reduces the burden on downstream crystallization steps, enhancing overall process efficiency. This chemical building block is engineered for consistency, allowing procurement teams to switch from lab-scale suppliers to bulk factory supply without reformulation.
COA Heavy Metal Parameters: Maintaining <10 ppm Limits to Prevent Resin Darkening in Acid Mordant Dye Synthesis
Heavy metal content is a decisive factor in acid mordant dye synthesis. Our COA mandates heavy metal limits maintained below 10 ppm. In acid mordant dye applications, residual metals can interact with the dye chromophore, causing resin darkening and reducing colorfastness. Field data indicates that maintaining strict control over heavy metal homogeneity is as important as the total limit. Variations in metal distribution can lead to batch-to-batch color shifts even when average levels are within specification. Our quality assurance protocols monitor heavy metal profiles to ensure uniform distribution, preventing localized darkening defects. Trace copper can alter the hue angle, while iron promotes oxidative coupling. We provide detailed heavy metal breakdowns upon request to support your technical evaluation. For precise batch data, please refer to the batch-specific COA.
Particle Size Distribution Specifications: Ensuring Consistent Glacial Acetic Acid Dissolution Without Clogging Filtration Membranes
Particle size distribution directly impacts dissolution kinetics and filtration efficiency. Our specifications ensure a controlled particle size range to facilitate consistent dissolution in glacial acetic acid and other polar solvents. In continuous manufacturing setups, inconsistent particle sizes can lead to rapid clogging of filtration membranes, causing downtime and pressure spikes. We optimize the milling process to prevent fines generation while avoiding oversized agglomerates. This ensures smooth slurry formation and predictable filtration rates. Fine particles can create a gel-like layer on larger agglomerates during dissolution, slowing the process. Our narrow distribution prevents this phenomenon. Additionally, during winter shipping, 2,4-Dihydroxybenzoic Acid can exhibit crystallization behavior if exposed to sub-zero temperatures for extended periods. Moisture absorption during transit can exacerbate caking. Our packaging protocols include moisture barriers to mitigate these risks, ensuring the material remains free-flowing upon receipt. Please refer to the batch-specific COA for detailed particle size metrics.
| Parameter | Specification | Notes |
|---|---|---|
| Assay | 99.3% min | Higher than standard lab grade |
| Heavy Metals | <10 ppm | Prevents resin darkening |
| Particle Size | Controlled distribution | Optimized for filtration |
| Appearance | White to off-white powder | Please refer to batch-specific |