Novo Nordisk has filed nine lawsuits against medical spas, wellness clinics and pharmacies for allegedly selling impure ...

Key fact An impure substance is a type of mixture, so melting points can be used to find out if a substance is pure or impure. Impure substances tend to have a slightly lower melting point than ...

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In chemistry this is not considered 'pure' and is a mixture. Miss Fong: Today we're going to be looking at pure and impure substances and how we can test for purity. First, let's cover the basics.