Oxalic Acid Standardized Preparation Procedure
The solution preparation process must strictly follow chemical laboratory-grade protocols. First, select containers made of high-density polyethylene (HDPE), which offers superior oxalic acid resistance compared to ordinary plastics. Glass containers may be used short-term, but long-term storage can cause sodium ion leaching, affecting solution stability.
When preparing, always measure the required amount of water first, then slowly pour the oxalic acid down the side of the container. This order must never be reversed. Experiments show that adding water to concentrated acid causes an instantaneous exothermic reaction reaching 80–100°C, which can easily lead to splashing accidents. Following the correct order keeps the temperature rise within a safe range.
For stirring, use a glass or polytetrafluoroethylene (PTFE) stir bar, and mix continuously for 5–7 minutes until the solution is completely clear. Note that oxalic acid dissolution is an endothermic process. Allow the prepared solution to stand for 20–30 minutes to reach room temperature equilibrium, at which point the pH will stabilize in the ideal range of 1.5–2.0.
Oxalic Acid – Zibo Anhao Chemical Co., Ltd.
Zibo Anhao Chemical Co., Ltd. is a trusted manufacturer and supplier of high‑purity oxalic acid (ethanedioic acid, CAS 144‑62‑7) headquartered in Zibo, Shandong, China. Our oxalic acid is available in both anhydrous (C₂H₂O₄, MW 90.03) and dihydrate (H₂C₂O₄·2H₂O, MW 126.07) forms, featuring a minimum purity of 99.6%. It appears as colorless transparent crystals or white crystalline powder, is odorless, and highly soluble in water and ethanol.
Manufactured under strict quality control and ISO 9001‑certified processes, our oxalic acid meets industrial and reagent‑grade standards with low impurities (Cl⁻ ≤0.005%, SO₄²⁻ ≤0.10%, Fe ≤0.05%). As a versatile dicarboxylic acid and reducing agent, it serves as a key chelating agent, bleaching agent, and chemical intermediate. Widely applied in metal surface treatment (rust removal, passivation), textile dyeing & printing (mordant, bleach), leather tanning, marble polishing, and water treatment. It is also critical for rare‑earth element extraction, organic synthesis (oxalate salts/esters), pharmaceutical intermediates, and cleaning product formulations.
At Anhao Chemical, we ensure stable bulk supply, rigorous quality inspection, and flexible packaging: 25kg bags, 500kg/1000kg FIBC, and ISO tanks. With decades of chemical production and export experience, we deliver oxalic acid to clients across Southeast Asia, Europe, the Middle East, and beyond, backed by professional technical support and efficient logistics. We are committed to providing high‑quality, cost‑effective oxalic acid solutions tailored to your industrial and commercial needs.
