woelen
Super Administrator
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LR grade and AR grade
I purchased some chemicals from a UK-based seller. Some of these chems are marked as "LR grade", and some others as "AR grade". I have an idea of what
these are, but this only is a vague idea, I would like to know a precise definition of these.
What is the precise meaning of these grades? Are they about how the chemicals can be used, or are they absolute meaasures of the maximum amount of
impurity in the chemicals?
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YT2095
International Hazard
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LR =Lab reagent AR=Analytical reagent, take a look here also: http://www.chemicals-technology.com/contractors/laboratories...
\"In a world full of wonders mankind has managed to invent boredom\" - Death
Twinkies don\'t have a shelf life. They have a half-life! -Caine (a friend of mine)
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The_Davster
A pnictogen
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What my text states, is that LR, laboratory reagent, usually is of no less purity than 99%, wheras AR, analytical reagent, is upwards of 99%.
AR grade in my opinion is of no use to the home-chemist, unless you have an analytical obsession and like titrating stuff down to 4 sugnificant
digits.
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