disodium ethanedioate
Sodium oxalate
CAS: 62-76-0
Molecular Formula: C2Na2O4
disodium ethanedioate - Names and Identifiers
disodium ethanedioate - Physico-chemical Properties
| Molecular Formula | C2Na2O4 |
| Molar Mass | 134 |
| Density | 2.34 |
| Melting Point | 250-270 °C |
| Boling Point | 365.1°C at 760 mmHg |
| Flash Point | 188.8°C |
| Water Solubility | 37 g/L (20 ºC) |
| Solubility | H2O: 0.1M at20°C, clear, colorless |
| Vapor Presure | 2.51E-06mmHg at 25°C |
| Appearance | White crystal |
| Color | White |
| Merck | 14,8650 |
| BRN | 3631622 |
| PH | 7-8.5 (25℃, 2.5% in H2O) |
| Storage Condition | 密封于阴凉、干燥处保存，按一般化学品规定贮运。 |
| Stability | Stability Stable; hygroscopic. Incompatible with strong oxidizing agents. |
| Sensitive | Hygroscopic |
| MDL | MFCD00012465 |
| Physical and Chemical Properties | Density 2.34 melting point 250-270°C water-soluble 37g/L (20°C) |
| Use | Used as a standard reagent for calibration of potassium permanganate solution and fabric, tanning agent, etc |
| Caution | It is corrosive. Avoid contact with skin and eyes. |
disodium ethanedioate - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R21/22 - Harmful in contact with skin and if swallowed. R34 - Causes burns |
| Safety Description | S24/25 - Avoid contact with skin and eyes. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| UN IDs | 3282 |
| WGK Germany | 1 |
| RTECS | KI1750000 |
| FLUKA BRAND F CODES | 21 |
| TSCA | No |
| HS Code | 29171100 |
| Hazard Class | 6.1(b) |
| Packing Group | III |
| Toxicity | LD50 orally in Rabbit: 375 mg/kg |
disodium ethanedioate - Upstream Downstream Industry
| Raw Materials | Oxalic acid Sodium carbonate Sodium hydroxide |
disodium ethanedioate - Nature
Open Data Verified Data
colorless crystal or white crystalline powder. Tasteless. Dissolved in 27 parts of water, 16 parts of boiling water, the aqueous solution is neutral. Insoluble in ethanol, ether. Decomposition to sodium carbonate and carbon monoxide at 250-270 °c.
Last Update：2024-01-02 23:10:35
disodium ethanedioate - Preparation Method
Open Data Verified Data
oxalic acid dihydrate was dissolved in water, heated, and sodium hydroxide solution was added dropwise to precipitate sodium oxalate crystals, and then washed with water and anhydrous ethanol successively, and dried to obtain pure sodium oxalate.
Last Update：2022-01-01 09:25:30
disodium ethanedioate - Introduction
No smell. It's hygroscopic. Insoluble in water (27 parts of water, 16 parts of boiling water), insoluble in alcohol and ether, its aqueous solution is nearly neutral. It's irritating.
Last Update：2022-10-16 17:27:16
disodium ethanedioate - Preparation method
Open Data Verified Data
1. Carbon monoxide and sodium hydroxide react at 160 ℃ and 2MPa to produce sodium formate, which is then dehydrogenated at 400 ℃ to obtain sodium oxalate. Purify by recrystallization with water.
2. Slowly add the sodium hydroxide solution to the oxalic acid aqueous solution at 70-80 ℃ with continuous stirring until the phenolphthalein undergoes a strong alkaline reaction and the temperature remains constant. After the reaction is complete, quickly filter out sodium oxalate crystals, wash with water until the pH value is qualified, wash with a small amount of ethanol, and vigorously filter. Then, under continuous stirring, dry at 150-200 ℃.
Last Update：2023-12-06 11:16:33
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Raw Materials for disodium ethanedioate