Ethanedioic acid.
Molecular formula : C2H2O4 /C2H2O4 .2H2O (?)
MW : 90.04
CAS No. :144-62-7
Nature transparent colorless crystals or a white powder, odorless, The findings. 1.650g/cm3 density. 101 ° C melting point. The boiling point of 150 ° C (sublimation). Slightly soluble in water, soluble in water, alcohol, ether-soluble, non-soluble in benzene. In dry air heating or small crystal water will be lost. The organic acids are strong acid, alkali and the Sino-and role. With reductive. With sulfuric acid role lose moisture, the foundation decomposed into dioxide and carbon monoxide. And the role of oxidant easily oxidized into carbon dioxide and water. Toxic to the skin, mucous membrane and stimulate corrosion vulnerable by the epidermis, mucosal absorption cause poisoning. Air maximum allowable concentration of 1m g/m3.
what is CAS no.???
ReplyDeleteJesslyn > I couldn't quite understand those information about ethanedioic acid. Could you please rephrase them? Anyway what are the properties of ethanedioic acid that make you think that it is a good choice for standardisation of alkali(NaOH)? (Why we do not use HCl or H2SO4 to standardise) =)
ReplyDeleteNyxen> CAS No. is a internationally recognized code system that scientists use to identify a specific chemical (just like IC no.). Sometimes a chemical has several way of naming, in this case, ethanedioic acid is also known as oxalic acid. So the CAS No. makes it easier for scientists to search for certain chemicals in the database.
-Mr Tan
Eh Jess, I can see that you are using powderful scientific terms n all but, really, I catch no ball.
ReplyDeleteBtw, did you noe that oxalic acid is 3000 times stronger than acetic acid?