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What is difference between Related Substance & Impurity 
 Question Submitted By :: Analytical-Chemistry
I also faced this Question!!     Answer Posted By  
# 1
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)
Is This Answer Correct ?    41 Yes 5 No

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