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?
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?