Riel Chemical Co., Ltd.
| Payment Terms | L/C, T/T |
| Supply Ability | 50 tons per day |
| Delivery Time | 5 work day |
| Packaging Details | 25 kg polyethylene woven bag, moisture-proof, easy to transport |
| CAS | 6153-56-6 |
| EINECS | 205-634-3 |
| Appearance | White powder or crystal |
| Crystalline hydrate | Dihydrate |
| Life span | two years |
| Molecular weight | 90.0349 |
| Density | 1.772 g/cm³ |
| Brand Name | Riel Chemical |
| Model Number | 99.6% |
| Certification | SGS, ISO9001, CE |
| Place of Origin | Weifang |
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Product Specification
| Payment Terms | L/C, T/T | Supply Ability | 50 tons per day |
| Delivery Time | 5 work day | Packaging Details | 25 kg polyethylene woven bag, moisture-proof, easy to transport |
| CAS | 6153-56-6 | EINECS | 205-634-3 |
| Appearance | White powder or crystal | Crystalline hydrate | Dihydrate |
| Life span | two years | Molecular weight | 90.0349 |
| Density | 1.772 g/cm³ | Brand Name | Riel Chemical |
| Model Number | 99.6% | Certification | SGS, ISO9001, CE |
| Place of Origin | Weifang | ||
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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.
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: | |
Oxalic acid cleaning role
1. Metal cleaning
Rust removal: oxalic acid can react with rust (iron oxide) to produce soluble compounds,
which are often used to remove rust on metal surfaces.
Surface treatment: Used to clean stainless steel, copper, aluminum and other metals,
restore luster and remove the oxide layer.
2. Stone cleaning
Marble and granite: oxalic acid can remove stains and scale on the surface of the stone,
but it needs to be used carefully to avoid corrosion.
3. Wood cleaning
Bleaching: Oxalic acid is used to bleach wood, remove stains and discoloration, and restore the original color.
4. Textile cleaning
Stain removal: Oxalic acid can remove rust and ink stains on clothing, often used in laundry and home cleaning.
5. Industrial equipment cleaning
Boilers and pipes: Oxalic acid is used to remove scale and sediment and maintain equipment efficiency.
6. Clean your home
Bathroom and kitchen: Oxalic acid can remove scale, soap scale and mineral deposits,
and is often used to clean tiles, toilets and sinks.
Precautions for use
Protective measures: oxalic acid is corrosive, wear gloves and goggles when using,
avoid contact with skin and eyes.
Ventilation: Ventilation should be maintained during use to avoid inhaling steam.
Concentration control: Adjust the concentration according to the cleaning object to avoid excessive corrosion.
Neutralization treatment: After use, it is necessary to neutralize and properly handle the waste liquid to
prevent environmental pollution.
Sum up
Oxalic acid is widely used in cleaning, especially in the cleaning of metal, stone, wood and textiles,
but attention should be paid to safety and environmental protection when used.
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.
Company Details
Business Type:
Manufacturer,Exporter
Year Established:
2005
Total Annual:
4500000-5000000
Employee Number:
>121
Ecer Certification：
Verified Supplier
Riel Chemicals – Leading Enterprise in Basic Chemical Manufacturing Who we are ? Established in 2005 and headquartered in Weifang City, Shandong Province—a hub of China’s chemical industry—Riel Chemicals is a national high-tech enterprise specializing in the R&D, prod... Riel Chemicals – Leading Enterprise in Basic Chemical Manufacturing Who we are ? Established in 2005 and headquartered in Weifang City, Shandong Province—a hub of China’s chemical industry—Riel Chemicals is a national high-tech enterprise specializing in the R&D, prod...
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