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Ahmed KhanI'm a trader from Pakistan. I have bought sodium hempetaphosphate with Manager Hu and worked with him for 3 times. THKs Hu, now I have become a local agent. Riel Chemical is indeed a trusted partner. Highly recommended for friends who need high quality chemical products.
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Maria J GarciaOverall, I was impressed. Whether it is product details or service response speed, it is done very well, and customers are satisfied. Warmly tips: Could you guys add more payment methods?that would be great.
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LabrekeoLa vitesse de livraison est très satisfaisante et presque aucune inquiétude. Chaque fois que la coopération fonctionne sans à-coup. Recommandez sincèrement à d’autres acheteurs!
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محمد لاگولدشریک خوب، پیدا کردن چنین تامین کننده ای عالی است، برای شما آرزوی موفقیت دارم
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JackThe cooperation with Riel Chemical Co., Ltd. is our most sensible choice. Your team's efficiency, professionalism and innovative spirit are impressive, and we are looking forward to further cooperation in the future! -- Jack Sales manager
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ອາ ລິ ສໄປ ຈົນ ສຸດ ຂີດ, ຂອບ ໃຈ ຫລາຍໆ ທີ່ ມີ ທ່ານ! ບໍ່ ວ່າ ຈະ ເປັນ ການ ສະຫນັບສະຫນູນ ຢ່າງ ເຕັມທີ່ ໃນ ເວລາ ທີ່ ສໍາຄັນ ຫລື ການ ເອົາ ໃຈ ໃສ່ ຢ່າງ ລະມັດລະວັງ ຕໍ່ ລາຍ ລະອຽດ ຂອງ ການ ຮັບ ໃຊ້ ປະຈໍາ ວັນ, ເຮົາ ຮູ້ສຶກ ວ່າ ໄດ້ ຮັບ ຄວາມ ໄວ້ ວາງ ໃຈ. ຂໍ ໃຫ້ ມິດຕະພາບ ຍືນ ຍົງ ຕະຫລອດ ໄປ ແລະ ການ ຮ່ວມ ໄມ້ ຮ່ວມ ມື ຈະ ຍືນ ຍົງ ຕະຫລອດ ໄປ ——[ທີມການຄ້າເຄມີຂອງລາວ]
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Mr. ZhaoWe have been cooperating with Riel Chemical for five years. The product quality has always been perfect and the usage effect is good. Your company's sales manager is also particularly polite
Sewage Treatment Oxalic Acid Rust Remover Descaling 99.6 % Industrial Grade
Place of Origin | Weifang, Shandong |
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Brand Name | Riel Chemical |
Certification | SGS,9001,ISO |
Model Number | 99.6% |
Minimum Order Quantity | 1Tons |
Price | USD150-260FOB |
Packaging Details | 25kg polyethylene woven bag,moisture-proof,easy to transport. |
Delivery Time | 5 works |
Payment Terms | L/C, T/T |
Supply Ability | 50Tons perday |

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xProduct Details
CAS | 6153-56-6 | EINECS NO | 205-634-3 |
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Grade Standard | Industrial Grade | Application | Pickling, Iron Removal Reducing Agent, Bleaching |
Shelf Life | 2years | Solubility | Water Soluble |
Warning Of Dangerous Goods | Slightly Corrosive | Smell | Odorless Solid |
Highlight | sewage treatment oxalic acid rust remover,industrial oxalic acid rust remover,industrial oxalic acid as rust remover |
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20 GP Container | Maximum load (tons) | |
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With tray | 22 | |
No tray | 25 |
Product Description
Industrial Grade Oxalic Acid 99.6% for Sewage Treatment and Rust Removal
Product Specifications
Attribute | Value |
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CAS | 6153-56-6 |
EINECS NO | 205-634-3 |
Grade Standard | Industrial Grade |
Application | Pickling, iron removal reducing agent, bleaching |
Shelf Life | 2 years |
Solubility | Water Soluble |
Warning | Slightly corrosive |
Smell | Odorless solid |
Key Attributes
- Chemical formula: C₂H₂O₄*2H₂O
- CAS: 6153-56-6
- Purity: 99.6%
Production Standard (GB/T1626-2008)
No. | Items for detecting and analyzing | Standard value |
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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 Properties
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) | |
Chemical properties: 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). |

Applications
- Detergent: Rust remover for metal surfaces and cleaning agent for toilets, tiles, etc.
- Industrial applications: Bleach in textile and wood industries, metal and marble polishing.
- Chemical reagents: Reducing agent and complexing agent for titration analysis, catalyst in chemical reactions.
- Medical field: Laboratory reagents for compound preparation (historical use as hemostatic agent).
- Other uses: Scale remover for boilers and pipes, wood preservative treatment.
Safety Precautions
- Toxicity: Harmful when ingested or inhaled, can cause skin and eye irritation.
- Storage: Store in cool, dry place away from incompatible substances.

Frequently Asked Questions
What is your payment term?
We accept T/T and L/C at sight as payment terms.
Are you able to deliver on time?
Yes, we specialize in this product line and maintain strict quality control to ensure timely delivery of top-quality goods.
Do you provide free samples?
Yes, we provide free samples with the customer responsible for express shipping fees.
How about the price? Can you make it cheaper?
We prioritize customer benefits and offer competitive, negotiable pricing based on order conditions.
Can I visit your company and factory in China?
Yes, we welcome visits to our facility in Weifang, China, with airport pickup/dropoff service provided.
What if there is a quality problem?
Our professional after-sales team promptly addresses all quality concerns with comprehensive support.
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