Manufacturer Good Price Oxalic Acid CAS：144-62-7
Applications of Oxalic Acid
1. Oxalic acid can be mainly used as reducing agent and bleaching agent, mordant for dyeing and printing industry, also used in refining rare metal, the synthesis of various oxalate ester amide, oxalate and grass, etc.
2. Used as analytical reagent.
3. Used as laboratory reagents, chromatography analysis reagent, dye intermediates and standard material.
4. Oxalic acid is mainly used for producing drugs such as antibiotics and borneol and solvent for extracting the rare metal, reducing agent and dye, tanning agent, etc. In addition, oxalic acid can also be used for the synthesis of various kinds of oxalate ester, oxalate, and oxamide with diethyl oxalate, sodium oxalate and calcium oxalate having the largest yield. Oxalate can also be used for the production of cobalt-molybdenum-alumina catalyst, cleaning of metal and marble as well as the bleaching of textiles.
Agricultural Uses：Oxalic acid, (COOH)2, also called ethanedioic acid, is a white, crystalline solid, slightly soluble in water. It is a naturally occurring highly oxidized organic compound with significant chelating activity. It is strongly acidic and poisonous, produced by many plants like sorrel (sourwood), the leaf blades of rhubarb, bark of eucalyptus and many plant roots. In plant cells and tissues, oxalic acid gets accumulated as either sodium, potassium or calcium oxalate, of which the latter occurs as crystals. In turn, salts of oxalic acids enter the bodies of animals and human beings, causing pathological disorders, depending upon the amount consumed. Many species of fungi like Aspergillus, Penicillium, Mucor, as well as some lichens and slime moulds produce calcium oxalate crystals. Upon the death of these microorganisms, plants and animals, the salts get released into the soil, causing some amount of toxicity. However, oxalate-degrading microbes, called Oxalobacter formigenes, decrease oxalate absorption in animals and humans.
Oxalic acid is the first of a series of dicarboxylic acids. It is used (a) as a bleaching agent for stains like rust or ink, (b) in textile and leather production, and (c) as monoglyceryl oxalate in the production of ally1 alcohol and formic acid.
Specification of Oxalic Acid
|
Compound |
Specification |
|
Content |
≥99.6% |
|
Sulfate (In S04), % ≤ |
0.20 |
|
Burning Residue, % ≤ |
0.20 |
|
Heavy metal (In Pb), % ≤ |
0.002 |
|
Iron (In Fe), % ≤ |
0.01 |
|
Chloride (In Ca), % ≤ |
0.01 |
|
Calcium (In Ca), % ≤ |
0.01 |
Packing of Oxalic Acid
25KG/BAG
Storage: Preserve in well-closed, light-resistant, and protect from moisture.
Our Advantages
300kg/drum
Storage: Preserve in well-closed, light-resistant, and protect from moisture.
FAQ
Q1: What is oxalic acid? What are its core physical and chemical properties?
Oxalic acid, also known as ethanedioic acid, is the simplest organic dibasic acid. The commonly used industrial grade is dihydrate oxalic acid, which appears as colorless transparent monoclinic crystals or white crystalline powder with no odor and a sour and astringent taste. Core properties: it is easily soluble in water and ethanol, slightly soluble in ether, and insoluble in benzene and chloroform. Its aqueous solution is acidic, with strong reducibility, complexing ability and slight corrosiveness. It is thermally decomposable, losing crystal water at about 100℃ and decomposing into carbon monoxide, carbon dioxide and water at high temperatures, while remaining stable at room temperature.
Q2: What are the CAS number, molecular formula and conventional content specifications of oxalic acid?
CAS Number: 144-62-7 (Anhydrous Oxalic Acid), 6153-56-6 (Oxalic Acid Dihydrate); Molecular Formula: H₂C₂O₄ (Anhydrous), H₂C₂O₄·2H₂O (Dihydrate). The mainstream commercial product on the market is oxalic acid dihydrate, with conventional content specifications: industrial grade ≥99.0%, refined grade ≥99.5%, electronic grade ≥99.9%.
Q3: What is the difference between oxalic acid, ordinary acetic acid and hydrochloric acid?
The three acids have significant core differences: Oxalic acid is an organic weak dibasic acid with extremely strong reducibility and excellent ability to complex metal ions, mainly used for rust removal, bleaching and complex purification. Acetic acid is an organic weak acid with low corrosiveness, mostly applied in seasoning and solvent preparation. Hydrochloric acid is a strong inorganic acid with strong acidity and corrosiveness but no reducibility, mainly used for acid pickling and scale removal. Oxalic acid can remove rust mildly without damaging the base material, making it an irreplaceable industrial auxiliary agent compared with other acids.
Q4: What grades does oxalic acid have? What are the differences in applicable scenarios for each grade?
There are three mainstream grades on the market with strictly distinguished and non-interchangeable applications: 1. Industrial Grade Oxalic Acid (content ≥99.0%): cost-effective with moderate impurities, widely used in general industrial scenarios such as printing and dyeing bleaching, metal rust removal, leather treatment, building material cleaning, rare earth extraction and chemical synthesis. 2. Refined Grade Oxalic Acid (content ≥99.5%): lower impurities and higher purity, suitable for mid-to-high-end scenarios including high-end chemical synthesis, fine cleaning and battery raw material preparation. 3. Electronic Grade Oxalic Acid (content ≥99.9%): with strictly controlled heavy metals and trace impurities and ultra-high purity, specially used for electronic component cleaning, semiconductor material processing and high-end electroplating industries. Special Reminder: All industrial, refined and electronic grade oxalic acid are non-food grade and are strictly prohibited for food processing, food soaking, food preservation and other food-related fields.
Q5: How to simply identify the quality of oxalic acid?
The quality can be preliminarily identified through intuitive methods: 1. Appearance: High-quality oxalic acid presents uniform white transparent crystals without yellowing, blackening, caking or impurity dust. 2. Solubility: It can be completely dissolved in warm water to form a clear solution without turbidity, precipitation or suspended matter. 3. Stability: It is not easy to absorb moisture or discolor during normal storage and has no peculiar smell. Accurate quality judgment requires third-party testing of indicators such as purity, heavy metals, ash content and iron content.
Q6: Is slight caking of oxalic acid a quality problem?
Slight caking is not a quality problem. Oxalic acid has strong hygroscopicity, and slight caking easily occurs due to humid environment or stacking extrusion during transportation, which is a normal physical phenomenon. Breaking the caked product will not change its chemical composition and use effect. Hard caking, yellowing or turbid solution indicates moisture deterioration, and the product cannot be used.
Q7: What are the core applications of industrial oxalic acid?
Industrial oxalic acid has a wide range of application scenarios, with core uses as follows: 1. Cleaning and Rust Removal: derusting and descaling steel, hardware, stone and ceramic tiles, and removing yellow spots. 2. Printing and Textile Industry: used as a mordant, reducing agent and bleaching agent to remove fabric stains and adjust color tone. 3. Metallurgy and Chemical Industry: purification of rare earth and rare metals, synthesis of chemical raw materials such as oxalate and oxalate ester. 4. Building Materials and Leather Industry: removing tile efflorescence, leather tanning auxiliary, wood bleaching and decolorization. 5. Other applications: sewage treatment, metal surface passivation, battery production auxiliary agents, etc.
