Raw powder quality

[Vin2]

What makes raw powders have better quality than others? If the melting point is spot on than shouldn't it be 100% of the substance?

 

[ronrr]

i dont think so different chemicals can melt at the same temp but good question

 

[Ligand]

melting point tests can be inaccurate in a home lab unless you have capillary tubes and a good set up. You can do a pretty good melt point test without those but most people do it incorrectly. The melt point test is not an effective way of determining purity of a sample. I think the closest thing for identifying purity would be a mass spec