Overview
Oxalic acid solid descaler is a highly effective cleaning agent derived from oxalic acid, a naturally occurring organic compound found in many plants. Its primary function is dissolving mineral deposits (calcium, iron) and rust through chelation and acidic action. Industrial-grade oxalic acid descaler typically contains 99% pure oxalic acid dihydrate, optimized for cleaning applications. It's favored over liquid alternatives for its stability, transport efficiency, and controlled dosing capabilities.
Physical and Chemical Properties
As a dicarboxylic acid, oxalic acid exhibits strong acidic properties (pKa1=1.25) and reducing capabilities. The solid form sublimes when heated rather than boiling, decomposing into carbon monoxide and formic acid at 189°C. Its high solubility enables concentrated cleaning solutions, while its density ensures easy handling. The crystalline structure minimizes dust formation compared to finer powders, improving workplace safety during handling.
Main Applications
In industrial settings, oxalic acid descaler removes rust from steel surfaces prior to painting or galvanizing. Textile industries use it as a mordant and bleach for cotton and linen. Woodworkers apply diluted solutions to restore weathered timber. Water treatment plants employ it for pipe descaling, where it dissolves calcium carbonate buildup without damaging metal substrates. Its chelating properties make it effective in rare earth extraction processes.
Safety and Storage
Oxalic acid requires careful handling due to its corrosive nature and toxicity (LD50=375 mg/kg in rats). Always use chemical-resistant gloves and eye protection. Storage areas must be well-ventilated and separated from alkaline substances to prevent violent reactions. Containers should bear GHS hazard pictograms (Corrosion, Health Hazard) and be stored on pallets to prevent moisture absorption. Shelf life typically exceeds 2 years when properly sealed.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001 certification and batch analysis reports. Standard packaging includes 25kg HDPE bags with inner liners or 1000kg supersacks for bulk orders. Key purchasing considerations include: verifying free-flowing crystalline form (indicating proper drying), checking for absence of yellow discoloration (sign of impurities), and confirming compliance with regional chemical regulations (REACH, TSCA).
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