How to say "substance, matter" in Russian?

Вещество

"substance, matter" is Вещество in Russian.

Вещество means "substance, matter" in English.

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Word #2018 of 4,000 by frequency in Russian — level B2.

Example

Химик добавил ядовитое вещество в раствор.

The chemist added a poisonous substance to the solution.