![]() ![]() For example, chemical grades for food and pharmaceutical chemicals may involve detecting impurities related to toxicity, metals and bioactive impurities. While that is true,Ĭertain chemical grades are also going to be tailored to a specific procedure, application or market. Now, this idea goes deeper than simply having grades represent a level of purity. ![]() Simply put, reagent grades relate to certain specifications and whether a chemical meets those specifications. To answer how much these chemical grades really matter, we need to look at why these different reagent grades were put into place – or what their general purpose is. The General Purpose of Different Chemical Grades: By the end of the article, you’ll have a much better idea about how to judge chemicals and what you can get away with substituting when needed. Then I’ll go into some of the more common grades and what they mean. I’ll go into the fundamentals about how these grades originated and what their purpose is for being differentiated from one another. So, I approached this topic in two primary ways to simplify what these different chemical grades really mean and why it matters. These are great questions when it comes to buying reagents, and it’s a subject that can be a little tedious to research. If you only use molecular biology grade, will using HPLC grade be a problem? What do these reagent grades even mean? How much do these grades really matter? Whether it’s in a chemical’s title or its description, there is usually a note about a reagent’s grade. ![]()
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