| CAS No.: | 144-62-7 |
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| Formula: | C2H2O4 |
| EINECS: | 205-634-3 |
| Type: | Pharmaceutical Intermediates |
| Appearance: | Liquid |
| Quality: | Industrial |
| Samples: |
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| Customization: |
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Colorless transparent crystal, often containing two molecules of crystal water. When heated to 98 ~ 100ºC, oxalic acid hydrate loses crystal water. Anhydrous oxalic acid is a colorless, odorless solid with delixing properties. It has two crystal forms, diamond and monoclinic. At room temperature, rhombic oxalic acid crystals are thermodynamically stable, while monoclinic oxalic acid crystals are thermodynamically metastable. The melting point and density of rhombic oxalic acid crystals are slightly higher than that of monoclinic oxalic acid crystals. Anhydrous oxalic acid melting point 189.5ºC (decomposition). Partial decomposition begins at 157ºC I When accelerated heating, all oxalic acid is decomposed to form formic acid, carbon monoxide and water. Soluble in water and alcohol, slightly soluble in ether, insoluble in benzene, chloroform and petroleum ether. Risk of burning in high heat, open flame or contact with oxidants. Decomposition by heating produces toxic gases.
Preparation
The furnace gas is refined under pressure and countercurrent contact with sodium hydroxide solution at a certain temperature to produce sodium formate. Sodium formate aqueous solution was concentrated by evaporation and separated by centrifuge to obtain sodium formate crystal. The sodium formate is converted into sodium oxalate in the calciner, the sodium carbonate is removed by washing and filtration, and the lime is added to the reaction. The resulting calcium oxalate is leached and broken down with sulfuric acid. Calcium sulfate is leached and oxalic acid crystals obtained are refined by recrystallization. Or with a mixture of 30% ~ 40% sulfuric acid and 20% ~ 25% nitric acid and vanadium pentoxide catalyst, under a certain temperature and pressure to oxidize glycol. Oxalic acid can also be obtained from carbohydrates such as glucose, sucrose, starch, dextrin and syrup by oxidation of nitric acid and sulfuric acid in the presence of vanadium catalyst. The crude product is redissolved with mother liquor and hot water, and then obtained by degreasing, separation, filtration and recrystallization.
Use
Mainly used as reducing agent and bleach, dyeing industry mordant, also used to extract rare metals, synthesis of various oxalates, oxalates and oxalylammonium and so on.
| Molecular Formula | C2H2O4 |
| Molar Mass | 90.03 |
| Density | 0.99 g/mL at 25 °C |
| Melting Point | 189-191ºC |
| Boling Point | 365.1°C at 760 mmHg |
| Flash Point | 188.8°C |
| Water Solubility | 90 g/L (20ºC) |
| Solubility | Soluble in water and ethanol, insoluble in benzene and chloroform. |
| Vapor Presure | 2.51E-06mmHg at 25°C |
| Appearance | White crystal |
| Storage Condition | 2-8ºC |
| MDL | MFCD00002573 |
25kg/bag,27tons without pallet per 20'FCL
Located in Guangrao County of Dongying City in the central city of the Yellow River Delta of China, Dongying Hengyu Chemical Co., Ltd enjoys superior geographical location, developed economy and convenient transportation. At present, we are a diversified & integrated enterprise specializing in the research and development, production and sales of chemical products.
Now, our business scope mainly involves pharmaceuticals, pesticide intermediates and fine chemicals and other fields. Under the support of strong technical force, advanced testing instruments and well-operated production equipment, as well as a work team with professional knowledges and rich sales experiences, we have successfully established and founded the markets for our products, which own great market potential.
Our main products are: dichloroacetyl chloride, acetyl chloride, trichloroethylene, trimethylacetyl chloride, trimethyl orthoacetate, n-butyryl chloride, aluminum chloride (anhydrous), trimethyl orthoformate, chloroacetyl chloride, phosphorous acid, N,N-dimethylformamide, propionic acid, cyclohexanone, isobutyryl chloride, trichloroacetyl chloride and other products.
Sticking to such service tenet of "reputation first, integrity based, getting survival by excellent quality", taking the quality of customers as the lifeblood of enterprises and enterprise management as the foundation, as well as focusing on honest business, we work hard to provide customers with high-quality products and thoughtful services.
We look forward to maintaining mutual-trusting, mutual-benefited, win-win and stable cooperative relations with friends at home and abroad, and working together for achieving a long-term development!
1.Q:Are you manufacturer?
A: As an integrated enterprise, we have our own production lines Dichloroacetyl chloride. Meanwhile we are one of the experienced distributors for other chemicals such as Methylene Chloride, Chloroform, Aniline oil, cyclohexanone, Dimethyl Formamide, Propylene Glycol, Ethylene Glycol, Dimethyl Carbonate, etc. We have competitive price benefited by ready stock and good relations with some leading chemical manufacturers.
2.Can I get samples ?
Yes, we can supply specified quantity free sample, you pay for the freight charge only.
3.Which documents do you support?
We can supply COA, TDS, MSDS and so on.
4.What is your MOQ?
A: Normally our MOQ is 20'FCL for each product. Other quantity kindly contact us for sure.
5. How can you guarantee the quality of your products?
(1)Our staff are all experienced in chemical products or related major background, they are well trained before quotation.
(2) Free sample or pre- shipment sample are available for our new cooperation before you place commercial order. We are sure the same specification commercial products as sample to customers.
(3) Third Party Inspection like SGS can be arranged according to your requirement before shipping.
(4) On-Spot QC in our APPROVED associated production bases with necessary certification like GMP, ISO etc.
6. How to pay?
PI will be sent firstly after our aligned products specification. Payment by T/T, X-Transfer ,LC and so on.
7.Q :Which kind of payment terms do you accept?
A:We prefer TT, LC payment terms. Other payment terms are flexible to be further discussed.
8.Q: What kind of package do you have?
A: We have various of packages to meet needs of our customers,like Iron drums,plastic drums, IBC tanks, Flexitank, ISO TANK and bags etc.
9.Q:What is your after-sales service?
Dongying Hengyu CHEMICAL aim to keep long term cooperation with all the customers, will sign a legally binding sales contract with customers for every order. If you have doubt or concern on our products or service, pls feel free to contact with us.
10.Q: What's your delivery time?
A: Usually we will arrange the shipment in 7 -15 days.
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