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.

The study of organic compounds is an important field in chemistry.

Kazumoto is my best friend.

His illness is due to a genetic cause.

Kiki is my best friend.

Koki is my best friend.

Kita is my best friend.