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What does 99% pure mean? What is the other 1%?

143 views 10 replies 8 participants last post by  DrRinse 
#1 · (Edited by Moderator)
Hi!

I've seen powders/substances advertised as 99%+ pure, or 98%, 95%, etc.... What are the remaining %s then. Is it fillers, impurities. Possibly toxic?

Cheers!
 
#11 ·
I think It's usually arse-covering (a bit like dettol advertising 'kills 99% bacteria' so that if it's tested they can point to the label and say that's the 1% it doesn't kill).

nothing is ever 100% pure so it's to be expected
It's exactly that ^^^^^ Even suppliers of analytical grade chemicals like Sigma-Aldrich can't claim absolute 100% purity. It's listed as ≥99.0%
 
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