When I answered this question for you yesterday, I simply defined the word synthesis for you. I have never used a term "chemical for synthesis" to determine the purity of a chemical. Here is a site that gives the various grades and their definitions that I have used in my career.
http://secure.sciencecompany.com/Chemical-Grade-Designations-W53.aspx
However, here is an extended list by another vendor which may come closer to answering your question.
http://www.reagents.com/products/reagents/grades.html
Note that your question today is not phrased the same as when you asked yesterday. Yesterday the emphasis, I thought, was on synthesis. Today, the emphasis appears to be on the use of these chemicals for analytical testing. As an analytical chemist I would not want to use them for analytical testing. I want to use primary standard grade, AR(ACS), Reagent Grade (ACS), or GR for my work.
How does a "chemical for synthesis" compare with the same chemical(ACS grade)when used in analytical testing?
Posted by candy on Tuesday, January 11, 2011 at 2:10pm.
Chemicals are supplied in different grades,e.g. ACS,AR...etc.What do we mean when we say that the chemical is for synthesis?
• Chemistry - DrBob222, Tuesday, January 11, 2011 at 5:38pm
We mean that the chemical in question is suitable to use for synthesis (making some other compound).
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