Overview
Industrial grade oxalic acid is a dicarboxylic acid with the formula C2H2O4. It is widely used in various industrial applications due to its strong chelating and reducing properties. The compound is typically produced through the oxidation of carbohydrates or ethylene glycol. Oxalic acid is available in different grades, with industrial grade being less pure than laboratory or food grades. Industrial grade oxalic acid is commonly used in metal treatment, cleaning, and textile processing, where high purity is not always required.
Physical and Chemical Properties
Industrial grade oxalic acid appears as a white crystalline powder with a sharp, acidic taste. It is highly soluble in water and polar solvents, forming a strongly acidic solution. The acid is a powerful reducing agent and forms stable complexes with metal ions, particularly calcium and iron. When heated, oxalic acid decomposes before boiling, releasing carbon monoxide and carbon dioxide. It reacts with bases to form oxalate salts and can corrode metals and other materials due to its acidic nature. These properties make it valuable in industrial applications but also require careful handling.
Main Applications
The primary use of industrial grade oxalic acid is in metal cleaning and treatment. It effectively removes rust and scale from ferrous metals and is used in aluminum anodizing processes. The textile industry employs oxalic acid as a bleaching agent for leather and wood. Other applications include water treatment for mineral scale removal, as a reducing agent in chemical synthesis, and in the production of rare earth metals. In the pharmaceutical industry, it serves as a precursor for certain drugs, though higher purity grades are typically used for this purpose.
Safety and Storage
Industrial grade oxalic acid is classified as corrosive and toxic. It can cause severe burns to skin and eyes upon contact and is harmful if ingested or inhaled. Proper personal protective equipment (PPE) including gloves, goggles, and respiratory protection should be used when handling this chemical. Storage requires a cool, dry, well-ventilated area away from incompatible substances such as strong oxidizers, bases, and metals. Containers should be tightly sealed to prevent moisture absorption and contamination. Spills should be neutralized with alkaline substances and cleaned up immediately.
B2B Procurement Guide
When purchasing industrial grade oxalic acid, buyers should verify the purity level (typically ≥99%), packaging type (often 25kg bags or drums), and supplier certifications. The material safety data sheet (MSDS) should be reviewed for specific handling and transportation requirements. Price is influenced by market demand, raw material costs, and order volume. Buyers are advised to compare multiple suppliers, consider bulk discounts, and evaluate logistics costs. Quality consistency and supplier reliability are crucial factors for industrial users who require steady supplies.
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