Why 99.995% DMSO Matters (And Why 99.9% Isn't Actually The Same)

At first glance, 99.9% and 99.995% look nearly identical. Both round to 'basically 100 percent.' Both are commonly labeled 'pharmaceutical grade.' And both are sold at prices that suggest they're interchangeable.
They're not. And for DMSO specifically — where purity isn't a nice-to-have but the defining property of the product — the difference matters.

H2s to cover

•The math behind the decimals
•Why DMSO purity is uniquely important
•How the industry got comfortable with 99.9%
•What trace contaminants actually look like
•How to read a DMSO certificate of analysis