Cas 6153-56-6 99.6% Oxalic Acid Dihydrate C2H2O4 Industrial Grade for Acid Pickling
Key attributes
Chemical formula: C₂H₂O₄·2H₂O
CAS: 6153-56-6
Purity: 99.6%
Production standard
COA need meets GB/T1626-2008:
| No. | Items for detecting and analyzing | Standard value |
| 1 | Oxalic acid content (C2H2O4)％≥ | 99.6 |
| 2 | Sulfide (as SO4) ％≤ | 0.07 |
| 3 | Combustion residue ％≤ | 0.01 |
| 4 | heavy metal (as Pb) ％≤ | 0.0005 |
| 5 | Fluoride (as Fe) ％≤ | 0.0005 |
| 6 | Chlorine (as Cl) ％≤ | 0.0005 |
| 7 | Calcium (as Ca) ％≤ | 0.0005 |
| 8 | Water insoluble content ％≤ | 0.02 |
References: Riel Chemical Lab1&2, National public service platform for standards information.
Introduction
Oxalic acid is an organic acid with the systematic name ethanedioic acid and chemical formula
HO−C(=O)−C(=O)−OH, also written as (COOH)2 or (CO2H)2 or H2C2O4.
It is the simplest dicarboxylic acid. It is a white crystalline solid that forms a colorless solution in water.
Its name is derived from early investigators who isolated oxalic acid from flowering plants of the genus Oxalis,
commonly known as wood-sorrels. It occurs naturally in many foods.
Excessive ingestion of oxalic acid or prolonged skin contact can be dangerous.
Physicochemical property
| Molecular weight: 126.07 g/mol | Appearance: white transparent crystal or powder, industrial products may be slightly yellow due to impurities. |
| Odor: Tasteless or slightly sour. | Density: 1.65 g/cm³ (20°C). |
| Melting point: The dihydrate lost its crystalline water at 101-102°C and was converted to anhydrous oxalic acid (H₂C₂O₄). Anhydrous oxalic acid sublimates at about 189.5°C and decomposes at high temperatures. |
| Solubility: Water: soluble in cold water (about 10 g/100 mL, 20°C), hot water solubility is higher. Ethanol: slightly soluble (approx. 5.7g /100 mL, 20°C) |
| Acid: Binaric acid, acidic stronger than acetic acid (pKa₁=1.25, pKa₂=4.14); It can react with bases, metal oxides, carbonates to form salts (such as sodium oxalate, calcium oxalate). |
| Reducibility: Under acidic conditions can be oxidized by strong oxidants (such as potassium permanganate) to produce CO₂ and H₂O |
| Complexation: Oxalate (C₂O₄²⁻) forms a soluble complex with metal ions (e.g. Fe³+, Al³+). It is used in metal cleaning or rust removal. |
| Thermal decomposition: Decomposition when heated above 150°C, producing CO, CO₂ and H₂O: |
Our manufacturing process
Oxalic acid is produced primarily by oxidizing carbohydrates or glucose with nitric acid or air in the presence of vanadium pentoxide.
Another method is to regenerate nitric acid using oxygen, using a variety of precursors, including glycolic acid and glycol.
As of 2011, only the Japanese company Mitsubishi has used this process.
A newer method requires oxidative carbonylation of alcohols to obtain dioxalate:
4 ROH + 4 CO + O 2 → 2 (CO 2 R) 2 + 2 H 2 O
These diesters are then hydrolyzed to oxalic acid. About 120,000 tons are produced annually.
Historically, oxalic acid was prepared by applying a caustic base (such as sodium hydroxide or potassium hydroxide)
to sawdust and then acidifying the oxalate with an inorganic acid (such as sulfuric acid).
Oxalic acid can also be formed by heating sodium formate in the presence of an alkaline catalyst.
Application
The main uses of oxalic acid include cleaning or bleaching, especially for rust removal (iron complexing agent).
Its use in rust remover is due to the fact that it forms a stable water-soluble salt with trivalent iron, namely the iron oxalate ion.
Oxalic acid is an ingredient in some teeth whitening products. About 25% of oxalic acid is used as a mordant in the dyeing process.
It is also used in bleach, especially for pulping wood, cork, straw, rattan, feathers, as well as for rust removal
and other cleaning, for baking powder, and as a third reagent in silica analysis instruments.
Product Advantages of Riel Chemical
1. Technical advantages
Mature production technology: Riel Chemical has more than 20 years of experience in the field of nitric acid production,
its production of concentrated nitric acid and dilute nitric acid products of stable quality, better than national standards,
to meet the needs of rare earth, electronics, reagents and other high-end industries.
2. Product quality advantage
High standard quality control: Riel Chemical's product quality is strictly controlled, and its potassium nitrate,
magnesium nitrate and other products are not only better than the national excellent product standards,
but also obtained the EU REACH certification, which can meet the needs of high-end applications.
Environmental protection and sustainable development: The company focuses on green manufacturing,
practices environmental protection concepts through resource recycling and waste reduction,
and is committed to building "China green chemical brand".
3. Industrial chain advantage
Integrated industrial chain layout: Riel Chemical has formed a complete industrial chain from nitric acid
to potassium nitrate, magnesium nitrate, nitro water-soluble fertilizer and other products,
which not only improves production efficiency, but also enhances market competitiveness.
Strong industrial chain extension ability: the company is supported by nitric acid technology,
and continues to expand business upstream and downstream, for example, by raising investment projects
to further extend to the integration pattern of "nitric acid-high-purity nitrate-molten salt",
creating new growth points for future development.
4. Market and customer advantages
Extensive supply and marketing network: Rier Chemical has established long-term
and stable cooperative relations with upstream and downstream quality customers
and suppliers to ensure the stable supply of raw materials and product sales channels.
International market layout: The company's products not only occupy an important position in the domestic market,
but also exported to the Middle East, Western Europe, Southeast Asia,
the United States and other more than 20 countries and regions,
becoming a stable upstream supplier of multinational companies.
5. Environmental protection and energy saving advantages
Energy saving and environmental protection technology: Through the design of circulating water process route,
Riel Chemical reduces the energy consumption of water, electricity and steam,
and realizes an efficient and low-consumption production mode.
Green manufacturing concept: The company integrates environmental protection
and sustainable development into the strategic layout,
and meets the high requirements of society for environmental protection by improving the level of cleaner production.
It belongs to surface treatment - rust removal expert
10% oxalic acid solution:
The rust removal speed of carbon steel is 30% faster than that of hydrochloric acid
Zero corrosion of the metal substrate
The treated surface can be directly electroplated.
Textile bleaching - Guardians of Natural fabrics
Application advantages in cotton and linen bleaching:
The whiteness has been increased by more than 40%
Fiber strength loss is less than 5%
More environmentally friendly than chlorine-based bleach
Rare earth extraction - High-efficiency extractant
In the rare earth separation process:
The extraction efficiency reaches 99.2%
It can be recycled more than 5 times
It costs 35% less than P507.
FAQ
1.What is your payment term?
We can accept T/T and L/C at sight as payment term.
2.Are you able to deliver on time?
Of course! we specialised in this line for many years,
many customer make a deal with me because we can deliver the goods on time and keep the goods top quality!
3.Do you provide free sample?
Yes, we can provide free sample . You only need to take the express fee.
4.How about the price?Can you make it cheaper?
We always take the customer’s benefit as the top priority.
Price is negotiable under different conditions, we are assuring you to get the most competitive price.
5.Can I visit your company and factory in China?
Sure. You are very welcomed to visit our company in Weifang, China.
(We will have someone responsible for picking up and dropping off at Weifang Airport)
6.What if there is a quality problem?
We have a professional and perfect after-sales service team, timely for you to deal with all problems.
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Cas 6153-56-6 99.6% Oxalic Acid The All Rounder of Industrial Cleaning And Metal Processing Images
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