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What is difference between Related Substance & Impurity
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related substances mean process related compounds and degradation compounds of drug substances or products.
Impurity profile is a description of the identified and unidentified impurities present in a typical batch of API or products.(Terms such as byproduct, transformation products, degradation products, interaction products, esidual solvents,related products and toxic impurities)
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Answer / j.asghari
Hi,what's differ related and impurity in drug substances
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Organic Chemistry 
