Hi there,
As I couldn't get my hands on the typically suggested naphthas or even more pure chemical compounds (in Sweden) I resorted to 'medicinal bensine' (with an 'i'!). It is the stuff that you can get in pharmacies and is usually used to clean up wounds or residue from plaster etc.
Given that it is sold in pharmacies I thought that it was somehow medical grade and would evaporate clean, and also the msds looks quite promising as it even states that there should be less than 0.1% benzene in it. However, performing an evap test on a petri dish, I found a very slight residue (just a very thin line at the outer margin, almost not visible).
Now my suspicion is that this residue is less a problem of the solvent than it is caused by uncleanliness of the petri dish. I was wondering whether this is likely; and how to actually properly clean your evaporation surface before doing an evap test. My best effort (which I suspect is not going to cut it) was to use soap, water and (1) dry it on air (2) with a freshly washed cloth (3) or with paper towel. All of the three methods left me with some residue after evaporation.
The product I am using is 'Unimedic Medicinsk Bensin' and here comes the MSDS, in case that helps.
Thank you so much for helping out here and many blessings!
As I couldn't get my hands on the typically suggested naphthas or even more pure chemical compounds (in Sweden) I resorted to 'medicinal bensine' (with an 'i'!). It is the stuff that you can get in pharmacies and is usually used to clean up wounds or residue from plaster etc.
Given that it is sold in pharmacies I thought that it was somehow medical grade and would evaporate clean, and also the msds looks quite promising as it even states that there should be less than 0.1% benzene in it. However, performing an evap test on a petri dish, I found a very slight residue (just a very thin line at the outer margin, almost not visible).
Now my suspicion is that this residue is less a problem of the solvent than it is caused by uncleanliness of the petri dish. I was wondering whether this is likely; and how to actually properly clean your evaporation surface before doing an evap test. My best effort (which I suspect is not going to cut it) was to use soap, water and (1) dry it on air (2) with a freshly washed cloth (3) or with paper towel. All of the three methods left me with some residue after evaporation.
The product I am using is 'Unimedic Medicinsk Bensin' and here comes the MSDS, in case that helps.
Thank you so much for helping out here and many blessings!
