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If you are referring to chemical purity by grade, I suggest you research the following terms:

ACS Grade (American Chemical Society) - highest level of purity

Reagent grade - Almost as stringent as ACS

USP Grade - Equivalent to ACS for many drugs

NF Grade (National Formulary) - Equivalent to ACS for many drugs

Laboratory Grade

Purified Grade

Technical Grade

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Jon Zwanzig

Lvl 2
3y ago

What else can I help you with?