The use of chemical weapons is prohibited by international law.

I am majoring in biochemistry at university.

I love organic chemistry classes.

My major is chemical engineering.

Analytical chemistry is a science that reveals the composition and structure of substances.

I am majoring in physical chemistry at university.

Chemical pollution has a serious impact on the health of the Earth.

This reaction occurs through a chemical process.

He is an excellent chemist who made many discoveries.

He is an expert in petrochemistry.