Relative molecular weight of oxalic acid

The relative molecular weight of oxalic acid is 90.0349.

Oxalic acid is an organic substance with the chemical formula C? h？ o？ It is a metabolic product of organisms and a binary weak acid, which is widely distributed in plants, animals and fungi and plays different functions in different living bodies.

The characteristics of oxalic acid are:

Colorless monoclinic or prismatic crystals or white powder, oxidized oxalic acid has no smell, and synthesized oxalic acid has smell. 150 ~ 160℃ sublimation. Weathering in dry hot air. 1g is soluble in 7mL of water, 2mL of boiling water, 2.5mL of ethanol, 1.8mL of boiling ethanol, 100mL of ether and 5.5mL of glycerol, but insoluble in benzene, chloroform and petroleum ether.

The pH value of 0. 1mol/L solution is 1.3. Relative density (water = 1) 1.653. The melting point is101~102℃ (187℃, anhydrous). Low toxicity, LD50 (rabbit, transdermal) 2000mg/kg.

According to the ecological data of oxalic acid:

This substance may be harmful to the environment, so pay special attention to water bodies.

This product is highly irritating and corrosive. Its dust or concentrated solution will cause serious harm to skin, eyes or mucous membrane. It is highly toxic and corrosive. The minimum lethal dose of oxalic acid is 7 1mg/kg for human and15 ~ 30g for adults.

If people take 5g oxalic acid orally, they will have symptoms such as gastroenteritis, collapse, convulsion and shock.

Chronic poisoning caused by inhalation of oxalic acid vapor has symptoms such as extreme weakness, nasal mucosa ulcer, cough, general pain, vomiting, weight loss, and protein in urine.