Hello Rich,

To the best of my knowledge, I am not aware of a statement to that affect in 
any IPC document that I have read.  If there is such a statement, then I 
would say it is an erroneous one and needs to be addressed.  There is HPLC 
grade IPA, which usually refers to 99.5% or higher purity.  There is also 
Electronic-grade IPA, which has the same purity as HPLC.  Then there is 
Technical grade IPA, which I believe is usually classified as anything above 
90% purity.  IPA is a chemical and its percentage of purity doesn't define 
whether or not it is still an "IPA",  it's chemical formula defines that. 
The % only defines how much junk is left behind in the solvent.  Now, there 
are IPC methods that deal with the percentage of the starting IPA, such as 
the ROSE and Ion Chromatography methods, and the reason is to minimize 
adding error into the measurement system that could skew the results for an 
actual sample.  If there is a statement as you indicate below, can you ask 
whoever told you that which IPC document states such a thing?  If not, I 
wonder if someone might have misread that part of the document

Best Regards,

Joe Russeau



-----Original Message----- 
From: Richard Kraszewski
Sent: Wednesday, June 28, 2017 4:48 PM
To: [log in to unmask]
Subject: [TN] IPC definition of alcohol

I have been lead to believe that there is a definition within IPC 
documentation  for  IPA (isopropyl alcohol).
That it defines that anything greater than  "XX%"  IPA shall be considered 
IPA.

Any thoughts?


Rich  Kraszewski
Senior Staff Process Engineer
Plexus Engineering Solutions
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[log in to unmask]


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