Oxalic acid dihydrate powder Raw Materials CAS 6153-56-6

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Uses and synthesis of Oxalic acid dihydrate powder

Oxalic acid dihydrate powder is also known as "蓚酸", the scientific name is "乙二酸", the molecular formula is (COOH)2-2H2O. The molecular formula is (COOH)2-2H2O.Oxalic acid dihydrate Raw Materials is colourless transparent monoclinic crystals, often in the form of calcium salts in rhubarb and other plants.

Oxalic acid dihydrate CAS 6153-56-6 has strong acidity, not easy to burn, toxic, soluble in hot water, ethanol and glycerol, slightly soluble in ether, harmful to eyes, corrosive effect on the skin, water has a stronger effect, people can be poisoned to death by taking 2 grams.

Applications / Functions of Oxalic acid dihydrate powder

Oxalic acid dihydrate Raw Materials is used as complexing agent in acid tin plating, Oxalic acid dihydrate Raw Materials and tin tetrachloride form a complexing salt dissolved in tin plating solution. Generally the amount added is 24-25 g/L.

Oxalic acid dihydrate powder can also be used for polishing copper parts. It is also used in oxalic acid anodic oxidation and hard anodic oxidation solutions for aluminium, as well as in electroplating solutions such as sulphate iron plating and brush plating.

Physicochemical Property of Oxalic acid dihydrate powder

Oxalic acid dihydrate CAS 6153-56-6 is a colourless transparent monoclinic crystal. Usually exists in dihydrate. Melting point 101～102 ℃. Relative density (19 ℃) 1.65, refractive index 1.440, soluble in water, slightly soluble in ether and ethanol. 157 ℃ sublimation. It is easy to weather and lose water into anhydrous oxalic acid.

Production methodprocess of Oxalic acid dihydrate powder

1. Oxidation of ethylene glycol is added into the reactor and oxidised by air at 130 °C. After post-treatment, Oxalic acid is obtained. Oxalic acid dihydrate Raw Materials can be obtained after post-treatment.
2. Or add ethylene glycol and water into the reaction kettle, heat to 80～85℃, add 98% nitric acid under vigorous stirring, react for 4h, then cool down to 25℃ and filter, crystallise Oxalic acid dihydrate powder.
3. Propylene oxidation method will be 60% ~ 70% of the nitric acid into the reactor, at 10 ~ 40 ℃ through the jen-ene, (both dosage ratio of 1 ︰ 0.1) stirring dissolved after heating to 50 ~ 65 ℃, the discharge of nitrogen oxide. Cooled to 20 ℃ crystallisation and filtration, dried Oxalic acid dihydrate CAS 6153-56-6.

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