67% vs. 70% Nitric Acid

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Finmad

Member
Joined
Dec 29, 2021
Messages
5
Location
Florida
I have been refining for about 12 months using Nitric at 70%. I found a local supplier with 67% at a good price. Is there any reason why I could not use 67%? It may be a stupid question, but with chemistry, sometimes the logical obvious is wrong....
 
I think they are both at the azeotrope of 68%
The first supplier may have just rounded off the number, and the second one may be one the conservative side to be sure.
I could be wrong but that little difference won't matter much.
I use 50% HNO3 +/- :unsure: Works fine and is often diluted more in the processes it's used in.
 
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