2 ms·
Interesting! However on Sigma-Aldrich website it says: technical grade, 60% How do you get from 60% to 99%? Do you have to (for pharmaceutical grade)? What ar
by sigmahead 7y ago
Interesting! However on Sigma-Aldrich website it says:
technical grade, 60%
How do you get from 60% to 99%? Do you have to (for pharmaceutical grade)?
What are the remaining 40%? poison? harmless byproducts?
- greatpatton 7y agoYou can buy the 97% version. Then a quick analysis (IR specter, NMR) will give you an idea of the contaminants if they are not specified by the manufacturer. Based on that you can take additional step to purify the product (extraction, chromatography, etc.) to the required level. The yield may not be perfect making overall cost a little bit higher, but this is really basic organic chemistry.