As a leading Chinese manufacturer of chemical raw materials, we supply high-purity oxalic acid (CAS No.: 6153-56-6) that meets international quality standards. Oxalic acid, also known as ethanedioic acid, is a dicarboxylic acid with the formula C₂H₂O₄. It exists in two common forms: anhydrous oxalic acid (white crystalline powder, melting point 189.5°C) and dihydrate oxalic acid (colorless transparent crystals, melting point 101.5°C). Both forms are highly soluble in water, alcohol, and ether, and exhibit strong reducing and chelating properties-making them indispensable in a wide range of industrial and commercial applications.

Key Properties of Our Oxalic Acid

Our oxalic acid is produced via advanced synthesis technology, ensuring consistent quality with the following core advantages:

High Purity: Anhydrous oxalic acid ≥99.6%; Dihydrate oxalic acid ≥99.0%, meeting USP, BP, and GB standards.

Low Impurities: Minimal levels of heavy metals (Pb ≤0.0005%), sulfate (≤0.02%), and insoluble substances, suitable for food and pharmaceutical auxiliary applications.

Stable Performance: Strictly controlled moisture content (anhydrous ≤0.5%; dihydrate ≤0.3%) to prevent caking and ensure long-term storage stability.

Wide-Ranging Industrial Applications

Oxalic acid's unique chemical properties make it a versatile raw material across multiple sectors:

Metallurgy: Used as a cleaning agent for metal surfaces (e.g., removing rust from steel, polishing aluminum and zinc alloys) and as a reducing agent in ore flotation.

Textile & Dyeing: Acts as a bleaching agent for cotton, linen, and wool fabrics, and as a mordant in dyeing processes to enhance color fastness.

Cleaning & Degreasing: A key component in industrial cleaners for removing scale, rust, and mineral deposits from boilers, pipelines, and kitchen equipment.

Pharmaceutical & Food: Serves as an auxiliary in pharmaceutical synthesis (e.g., for producing antibiotics) and as a food additive (E240) for pH adjustment and preservative purposes (compliant with FDA regulations).

Agriculture: Used in the formulation of herbicides and as a chelating agent to improve nutrient absorption in fertilizers.

Chemical Synthesis: A precursor for producing oxalates (e.g., calcium oxalate, sodium oxalate), glycolic acid, and other fine chemicals.

Quality Control & Compliance

We adhere to strict quality management systems (ISO 9001:2015 certified) throughout the production process-from raw material selection to final packaging. Our oxalic acid undergoes rigorous testing (including purity, impurity content, and solubility) in our in-house laboratory to ensure compliance with global standards. We also provide comprehensive COA (Certificate of Analysis) for each shipment to guarantee transparency and reliability.

📌 For quotations and product details, please contact:
Kitty Liu – Sales Manager
📱 Cel/Wechat: +86 138 2440 4576
📧 Email: kitty@weiqichem.com

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