Description

Oxalic Acid Dihydrate (C2H2O4·2H2O) is a high-purity, crystalline organic acid widely recognized for its strong chelating and reducing properties. This versatile chemical is essential for industrial processes requiring precise metal ion control and surface treatment. It serves as a critical raw material for manufacturers in the metal finishing, pharmaceutical, textile, and specialty chemical synthesis sectors.

Application

• Metal Cleaning & Surface Treatment: Primary agent for rust removal, aluminum anodizing, and metal polishing.
• Pharmaceutical Intermediates: Key starting material and precipitating agent in the synthesis of various active pharmaceutical ingredients (APIs).
• Textile & Leather Processing: Used as a bleaching agent and mordant in dyeing processes for natural fibers and leather.
• Rare Earth Element Extraction: Effective solvent and complexing agent in the hydrometallurgical recovery and purification of rare earth metals.
• Cleaning Formulations: Core ingredient in industrial and household cleaners, particularly for stain removal and descaling.
• Chemical Synthesis: Important reagent in organic synthesis for producing fine chemicals, agrochemicals, and other oxalate derivatives.

Basic Information

Product Name	Oxalic Acid Dihydrate
CAS No.	6253-56-6
Molecular Formula	C2H2O4·2H2O
Molecular Weight	126.07 g/mol
Synonyms	Ethanedioic Acid Dihydrate; Oxalic Acid (Dihydrate); Dicarboxylic Acid Dihydrate; Wood Bleach; Aktisal; Aquisal; Hydrogen Oxalate Dihydrate
EINECS	205-634-3 (for the anhydrous form; contact for details on dihydrate)

Quality Control

Our Oxalic Acid Dihydrate is manufactured under a stringent quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, heavy metal content, and physical properties. Certificates of Analysis (COA) are provided with every shipment to guarantee traceability and compliance with your procurement standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area away from incompatible materials such as strong alkalis and oxidizing agents. Due to its nature as a strong acid and potential moisture sensitivity, the storage area temperature should be maintained between 15-25°C.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (C2H2O4·2H2O)	≥ 99.5%
Water of Crystallization	28.0 - 29.0 %
Residue on Ignition (Sulfated Ash)	≤ 0.02%
Chloride (Cl)	≤ 10 ppm
Sulfate (SO4)	≤ 20 ppm
Heavy Metals (as Pb)	≤ 5 ppm
Iron (Fe)	≤ 5 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.