Meanings of such poisons in English

I had heard of such poisons, and here, in very truth, was one of them at work.

Some of them had heard, somewhere or other, that it was usual to make preliminary experiments with such poisons on the brute-beasts.

Perhaps a series of such poisons was hidden in the chemical world, perfectly designed to obliterate cancer cells but spare normal cells.

If a strong man is so much affected by this poison, how much less can a boy resist the inroads of such poisons?

You may well live in enlightened areas of the world, with governments that keep you safe from such poisons, but BuzzFeed only scratched the surface.

Such poisons are known as disinfectants.